/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/array-eq-symm.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 03:48:20,643 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 03:48:20,644 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 03:48:20,665 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 03:48:20,705 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-06-05 03:48:20,732 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 03:48:20,732 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 03:48:20,732 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 03:48:20,733 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 03:48:20,734 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 03:48:20,734 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 03:48:20,734 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 03:48:20,734 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 03:48:20,735 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 03:48:20,735 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 03:48:20,735 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 03:48:20,735 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 03:48:20,735 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 03:48:20,735 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 03:48:20,736 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 03:48:20,736 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 03:48:20,736 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 03:48:20,736 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 03:48:20,736 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 03:48:20,736 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 03:48:20,736 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 03:48:20,736 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 03:48:20,736 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 03:48:20,736 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 03:48:20,736 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 03:48:20,736 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 03:48:20,737 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 03:48:20,737 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 03:48:20,737 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 03:48:20,737 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 03:48:20,737 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 03:48:20,737 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 03:48:20,966 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 03:48:20,978 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 03:48:20,980 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 03:48:20,980 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 03:48:20,981 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 03:48:20,981 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/array-eq-symm.wvr.bpl [2021-06-05 03:48:21,007 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/array-eq-symm.wvr.bpl' [2021-06-05 03:48:21,038 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 03:48:21,060 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 03:48:21,060 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 03:48:21,061 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 03:48:21,061 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 03:48:21,069 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:48:21" (1/1) ... [2021-06-05 03:48:21,073 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:48:21" (1/1) ... [2021-06-05 03:48:21,078 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 03:48:21,078 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 03:48:21,078 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 03:48:21,079 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 03:48:21,083 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:48:21" (1/1) ... [2021-06-05 03:48:21,083 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:48:21" (1/1) ... [2021-06-05 03:48:21,084 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:48:21" (1/1) ... [2021-06-05 03:48:21,084 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:48:21" (1/1) ... [2021-06-05 03:48:21,085 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:48:21" (1/1) ... [2021-06-05 03:48:21,087 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:48:21" (1/1) ... [2021-06-05 03:48:21,088 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:48:21" (1/1) ... [2021-06-05 03:48:21,088 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 03:48:21,089 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 03:48:21,089 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 03:48:21,089 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 03:48:21,090 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:48:21" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 03:48:21,129 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 03:48:21,129 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 03:48:21,130 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 03:48:21,130 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 03:48:21,130 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 03:48:21,130 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 03:48:21,130 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 03:48:21,130 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 03:48:21,130 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 03:48:21,131 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 03:48:21,238 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 03:48:21,238 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 03:48:21,239 INFO L202 PluginConnector]: Adding new model array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 03:48:21 BoogieIcfgContainer [2021-06-05 03:48:21,239 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 03:48:21,240 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 03:48:21,240 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 03:48:21,242 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 03:48:21,242 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:48:21" (1/2) ... [2021-06-05 03:48:21,243 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72faa977 and model type array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 03:48:21, skipping insertion in model container [2021-06-05 03:48:21,243 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 03:48:21" (2/2) ... [2021-06-05 03:48:21,243 INFO L111 eAbstractionObserver]: Analyzing ICFG array-eq-symm.wvr.bpl [2021-06-05 03:48:21,247 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 03:48:21,247 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 03:48:21,247 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 03:48:21,247 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 03:48:21,281 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-06-05 03:48:21,295 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-05 03:48:21,307 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 03:48:21,307 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 03:48:21,307 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 03:48:21,307 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 03:48:21,307 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 03:48:21,307 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 03:48:21,307 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 03:48:21,307 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 03:48:21,313 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 28 places, 25 transitions, 66 flow [2021-06-05 03:48:21,326 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 55 states, 53 states have (on average 2.207547169811321) internal successors, (117), 54 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:21,327 INFO L276 IsEmpty]: Start isEmpty. Operand has 55 states, 53 states have (on average 2.207547169811321) internal successors, (117), 54 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:21,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-06-05 03:48:21,338 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:48:21,339 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:48:21,339 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:48:21,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:48:21,342 INFO L82 PathProgramCache]: Analyzing trace with hash 1540416471, now seen corresponding path program 1 times [2021-06-05 03:48:21,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:48:21,347 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967343408] [2021-06-05 03:48:21,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:48:21,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:48:21,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:48:21,473 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:48:21,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967343408] [2021-06-05 03:48:21,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967343408] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 03:48:21,474 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 03:48:21,474 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 03:48:21,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406056703] [2021-06-05 03:48:21,477 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 03:48:21,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:48:21,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 03:48:21,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 03:48:21,511 INFO L87 Difference]: Start difference. First operand has 55 states, 53 states have (on average 2.207547169811321) internal successors, (117), 54 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:21,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:48:21,570 INFO L93 Difference]: Finished difference Result 102 states and 226 transitions. [2021-06-05 03:48:21,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 03:48:21,571 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-06-05 03:48:21,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:48:21,578 INFO L225 Difference]: With dead ends: 102 [2021-06-05 03:48:21,578 INFO L226 Difference]: Without dead ends: 95 [2021-06-05 03:48:21,579 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 03:48:21,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-06-05 03:48:21,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 82. [2021-06-05 03:48:21,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.2839506172839505) internal successors, (185), 81 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:21,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 185 transitions. [2021-06-05 03:48:21,622 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 185 transitions. Word has length 11 [2021-06-05 03:48:21,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:48:21,622 INFO L482 AbstractCegarLoop]: Abstraction has 82 states and 185 transitions. [2021-06-05 03:48:21,622 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:21,622 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 185 transitions. [2021-06-05 03:48:21,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 03:48:21,625 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:48:21,625 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:48:21,625 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 03:48:21,625 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:48:21,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:48:21,629 INFO L82 PathProgramCache]: Analyzing trace with hash -214361416, now seen corresponding path program 1 times [2021-06-05 03:48:21,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:48:21,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145380977] [2021-06-05 03:48:21,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:48:21,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:48:21,689 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:48:21,689 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:48:21,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145380977] [2021-06-05 03:48:21,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145380977] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 03:48:21,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 03:48:21,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 03:48:21,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463416491] [2021-06-05 03:48:21,691 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 03:48:21,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:48:21,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 03:48:21,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 03:48:21,692 INFO L87 Difference]: Start difference. First operand 82 states and 185 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:21,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:48:21,744 INFO L93 Difference]: Finished difference Result 160 states and 352 transitions. [2021-06-05 03:48:21,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 03:48:21,745 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 03:48:21,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:48:21,746 INFO L225 Difference]: With dead ends: 160 [2021-06-05 03:48:21,746 INFO L226 Difference]: Without dead ends: 160 [2021-06-05 03:48:21,747 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 03:48:21,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-06-05 03:48:21,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 94. [2021-06-05 03:48:21,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.3118279569892475) internal successors, (215), 93 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:21,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 215 transitions. [2021-06-05 03:48:21,753 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 215 transitions. Word has length 14 [2021-06-05 03:48:21,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:48:21,754 INFO L482 AbstractCegarLoop]: Abstraction has 94 states and 215 transitions. [2021-06-05 03:48:21,754 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:21,754 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 215 transitions. [2021-06-05 03:48:21,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 03:48:21,755 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:48:21,755 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:48:21,755 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 03:48:21,755 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:48:21,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:48:21,755 INFO L82 PathProgramCache]: Analyzing trace with hash 110711837, now seen corresponding path program 1 times [2021-06-05 03:48:21,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:48:21,756 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265932414] [2021-06-05 03:48:21,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:48:21,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:48:21,781 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:48:21,781 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:48:21,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265932414] [2021-06-05 03:48:21,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265932414] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 03:48:21,782 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 03:48:21,782 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 03:48:21,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897494463] [2021-06-05 03:48:21,782 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 03:48:21,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:48:21,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 03:48:21,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 03:48:21,783 INFO L87 Difference]: Start difference. First operand 94 states and 215 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:21,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:48:21,825 INFO L93 Difference]: Finished difference Result 171 states and 385 transitions. [2021-06-05 03:48:21,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 03:48:21,826 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 03:48:21,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:48:21,827 INFO L225 Difference]: With dead ends: 171 [2021-06-05 03:48:21,827 INFO L226 Difference]: Without dead ends: 163 [2021-06-05 03:48:21,827 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 03:48:21,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-06-05 03:48:21,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 116. [2021-06-05 03:48:21,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 2.2956521739130435) internal successors, (264), 115 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:21,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 264 transitions. [2021-06-05 03:48:21,834 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 264 transitions. Word has length 14 [2021-06-05 03:48:21,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:48:21,834 INFO L482 AbstractCegarLoop]: Abstraction has 116 states and 264 transitions. [2021-06-05 03:48:21,834 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:21,834 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 264 transitions. [2021-06-05 03:48:21,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 03:48:21,835 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:48:21,835 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:48:21,835 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 03:48:21,835 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:48:21,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:48:21,836 INFO L82 PathProgramCache]: Analyzing trace with hash -632263843, now seen corresponding path program 2 times [2021-06-05 03:48:21,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:48:21,836 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15610409] [2021-06-05 03:48:21,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:48:21,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:48:21,874 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:48:21,874 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:48:21,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15610409] [2021-06-05 03:48:21,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15610409] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:48:21,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769264784] [2021-06-05 03:48:21,874 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:48:21,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:48:21,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:48:21,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 03:48:21,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:48:22,051 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:48:22,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769264784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:48:22,052 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:48:22,052 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-06-05 03:48:22,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420552950] [2021-06-05 03:48:22,052 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 03:48:22,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:48:22,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 03:48:22,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 03:48:22,053 INFO L87 Difference]: Start difference. First operand 116 states and 264 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:22,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:48:22,095 INFO L93 Difference]: Finished difference Result 141 states and 326 transitions. [2021-06-05 03:48:22,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 03:48:22,095 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 03:48:22,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:48:22,096 INFO L225 Difference]: With dead ends: 141 [2021-06-05 03:48:22,096 INFO L226 Difference]: Without dead ends: 141 [2021-06-05 03:48:22,096 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 39.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 03:48:22,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-06-05 03:48:22,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 103. [2021-06-05 03:48:22,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.2941176470588234) internal successors, (234), 102 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:22,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 234 transitions. [2021-06-05 03:48:22,101 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 234 transitions. Word has length 14 [2021-06-05 03:48:22,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:48:22,101 INFO L482 AbstractCegarLoop]: Abstraction has 103 states and 234 transitions. [2021-06-05 03:48:22,101 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:22,101 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 234 transitions. [2021-06-05 03:48:22,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 03:48:22,102 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:48:22,102 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:48:22,302 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:48:22,303 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:48:22,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:48:22,303 INFO L82 PathProgramCache]: Analyzing trace with hash -1209640048, now seen corresponding path program 2 times [2021-06-05 03:48:22,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:48:22,303 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417372673] [2021-06-05 03:48:22,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:48:22,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:48:22,326 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:48:22,327 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:48:22,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417372673] [2021-06-05 03:48:22,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417372673] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 03:48:22,327 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 03:48:22,327 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 03:48:22,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528641438] [2021-06-05 03:48:22,327 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 03:48:22,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:48:22,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 03:48:22,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 03:48:22,328 INFO L87 Difference]: Start difference. First operand 103 states and 234 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:22,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:48:22,365 INFO L93 Difference]: Finished difference Result 144 states and 331 transitions. [2021-06-05 03:48:22,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 03:48:22,365 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 03:48:22,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:48:22,366 INFO L225 Difference]: With dead ends: 144 [2021-06-05 03:48:22,366 INFO L226 Difference]: Without dead ends: 142 [2021-06-05 03:48:22,367 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 03:48:22,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-06-05 03:48:22,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 103. [2021-06-05 03:48:22,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.284313725490196) internal successors, (233), 102 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:22,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 233 transitions. [2021-06-05 03:48:22,377 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 233 transitions. Word has length 14 [2021-06-05 03:48:22,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:48:22,378 INFO L482 AbstractCegarLoop]: Abstraction has 103 states and 233 transitions. [2021-06-05 03:48:22,378 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:22,378 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 233 transitions. [2021-06-05 03:48:22,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 03:48:22,381 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:48:22,381 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:48:22,381 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-05 03:48:22,381 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:48:22,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:48:22,382 INFO L82 PathProgramCache]: Analyzing trace with hash -10930008, now seen corresponding path program 1 times [2021-06-05 03:48:22,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:48:22,382 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15449308] [2021-06-05 03:48:22,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:48:22,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:48:22,447 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:48:22,447 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:48:22,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15449308] [2021-06-05 03:48:22,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15449308] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:48:22,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171731895] [2021-06-05 03:48:22,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:48:22,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:48:22,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 03:48:22,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:48:22,560 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:48:22,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171731895] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:48:22,560 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:48:22,560 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4] total 6 [2021-06-05 03:48:22,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797244813] [2021-06-05 03:48:22,561 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 03:48:22,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:48:22,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 03:48:22,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 03:48:22,561 INFO L87 Difference]: Start difference. First operand 103 states and 233 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:22,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:48:22,632 INFO L93 Difference]: Finished difference Result 300 states and 674 transitions. [2021-06-05 03:48:22,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 03:48:22,633 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 03:48:22,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:48:22,634 INFO L225 Difference]: With dead ends: 300 [2021-06-05 03:48:22,638 INFO L226 Difference]: Without dead ends: 286 [2021-06-05 03:48:22,638 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 25.8ms TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 03:48:22,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-06-05 03:48:22,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 143. [2021-06-05 03:48:22,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 2.352112676056338) internal successors, (334), 142 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:22,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 334 transitions. [2021-06-05 03:48:22,650 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 334 transitions. Word has length 17 [2021-06-05 03:48:22,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:48:22,651 INFO L482 AbstractCegarLoop]: Abstraction has 143 states and 334 transitions. [2021-06-05 03:48:22,651 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:22,651 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 334 transitions. [2021-06-05 03:48:22,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 03:48:22,653 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:48:22,653 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:48:22,864 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:48:22,865 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:48:22,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:48:22,865 INFO L82 PathProgramCache]: Analyzing trace with hash -1675583288, now seen corresponding path program 1 times [2021-06-05 03:48:22,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:48:22,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142975540] [2021-06-05 03:48:22,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:48:22,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:48:22,900 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:48:22,900 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:48:22,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142975540] [2021-06-05 03:48:22,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142975540] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:48:22,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371743381] [2021-06-05 03:48:22,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:48:22,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:48:22,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 03:48:22,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:48:22,987 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:48:22,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371743381] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:48:22,988 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:48:22,988 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 6 [2021-06-05 03:48:22,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986685020] [2021-06-05 03:48:22,988 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 03:48:22,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:48:22,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 03:48:22,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 03:48:22,989 INFO L87 Difference]: Start difference. First operand 143 states and 334 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:23,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:48:23,032 INFO L93 Difference]: Finished difference Result 248 states and 569 transitions. [2021-06-05 03:48:23,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 03:48:23,033 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 03:48:23,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:48:23,035 INFO L225 Difference]: With dead ends: 248 [2021-06-05 03:48:23,035 INFO L226 Difference]: Without dead ends: 248 [2021-06-05 03:48:23,036 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 34.6ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 03:48:23,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-06-05 03:48:23,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 194. [2021-06-05 03:48:23,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 2.4248704663212437) internal successors, (468), 193 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:23,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 468 transitions. [2021-06-05 03:48:23,041 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 468 transitions. Word has length 17 [2021-06-05 03:48:23,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:48:23,041 INFO L482 AbstractCegarLoop]: Abstraction has 194 states and 468 transitions. [2021-06-05 03:48:23,041 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:23,041 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 468 transitions. [2021-06-05 03:48:23,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 03:48:23,042 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:48:23,042 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:48:23,247 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:48:23,247 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:48:23,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:48:23,248 INFO L82 PathProgramCache]: Analyzing trace with hash -1837184638, now seen corresponding path program 2 times [2021-06-05 03:48:23,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:48:23,248 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631523439] [2021-06-05 03:48:23,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:48:23,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:48:23,279 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:48:23,279 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:48:23,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631523439] [2021-06-05 03:48:23,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631523439] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 03:48:23,279 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 03:48:23,279 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 03:48:23,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690840135] [2021-06-05 03:48:23,280 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 03:48:23,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:48:23,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 03:48:23,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 03:48:23,280 INFO L87 Difference]: Start difference. First operand 194 states and 468 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:23,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:48:23,310 INFO L93 Difference]: Finished difference Result 311 states and 725 transitions. [2021-06-05 03:48:23,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 03:48:23,310 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 03:48:23,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:48:23,312 INFO L225 Difference]: With dead ends: 311 [2021-06-05 03:48:23,312 INFO L226 Difference]: Without dead ends: 304 [2021-06-05 03:48:23,312 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.3ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 03:48:23,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2021-06-05 03:48:23,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 252. [2021-06-05 03:48:23,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 2.4701195219123506) internal successors, (620), 251 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:23,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 620 transitions. [2021-06-05 03:48:23,319 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 620 transitions. Word has length 17 [2021-06-05 03:48:23,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:48:23,319 INFO L482 AbstractCegarLoop]: Abstraction has 252 states and 620 transitions. [2021-06-05 03:48:23,319 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:23,319 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 620 transitions. [2021-06-05 03:48:23,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 03:48:23,319 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:48:23,320 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:48:23,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-06-05 03:48:23,320 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:48:23,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:48:23,320 INFO L82 PathProgramCache]: Analyzing trace with hash -1678798648, now seen corresponding path program 1 times [2021-06-05 03:48:23,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:48:23,320 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273721799] [2021-06-05 03:48:23,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:48:23,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:48:23,357 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:48:23,357 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:48:23,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273721799] [2021-06-05 03:48:23,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273721799] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 03:48:23,357 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 03:48:23,357 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 03:48:23,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255520199] [2021-06-05 03:48:23,358 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 03:48:23,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:48:23,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 03:48:23,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 03:48:23,358 INFO L87 Difference]: Start difference. First operand 252 states and 620 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:23,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:48:23,394 INFO L93 Difference]: Finished difference Result 243 states and 574 transitions. [2021-06-05 03:48:23,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 03:48:23,395 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 03:48:23,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:48:23,395 INFO L225 Difference]: With dead ends: 243 [2021-06-05 03:48:23,396 INFO L226 Difference]: Without dead ends: 208 [2021-06-05 03:48:23,396 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.3ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 03:48:23,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-06-05 03:48:23,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 208. [2021-06-05 03:48:23,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 2.4009661835748792) internal successors, (497), 207 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:23,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 497 transitions. [2021-06-05 03:48:23,399 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 497 transitions. Word has length 17 [2021-06-05 03:48:23,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:48:23,399 INFO L482 AbstractCegarLoop]: Abstraction has 208 states and 497 transitions. [2021-06-05 03:48:23,399 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:23,399 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 497 transitions. [2021-06-05 03:48:23,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 03:48:23,400 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:48:23,400 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:48:23,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-06-05 03:48:23,400 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:48:23,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:48:23,400 INFO L82 PathProgramCache]: Analyzing trace with hash 1963262152, now seen corresponding path program 2 times [2021-06-05 03:48:23,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:48:23,400 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138993792] [2021-06-05 03:48:23,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:48:23,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:48:23,421 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:48:23,421 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:48:23,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138993792] [2021-06-05 03:48:23,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138993792] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 03:48:23,421 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 03:48:23,421 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 03:48:23,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306925303] [2021-06-05 03:48:23,421 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 03:48:23,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:48:23,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 03:48:23,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 03:48:23,422 INFO L87 Difference]: Start difference. First operand 208 states and 497 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:23,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:48:23,442 INFO L93 Difference]: Finished difference Result 222 states and 527 transitions. [2021-06-05 03:48:23,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 03:48:23,443 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 03:48:23,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:48:23,443 INFO L225 Difference]: With dead ends: 222 [2021-06-05 03:48:23,443 INFO L226 Difference]: Without dead ends: 222 [2021-06-05 03:48:23,444 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 11.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 03:48:23,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-06-05 03:48:23,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 222. [2021-06-05 03:48:23,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 2.3846153846153846) internal successors, (527), 221 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:23,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 527 transitions. [2021-06-05 03:48:23,447 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 527 transitions. Word has length 17 [2021-06-05 03:48:23,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:48:23,447 INFO L482 AbstractCegarLoop]: Abstraction has 222 states and 527 transitions. [2021-06-05 03:48:23,447 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:23,447 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 527 transitions. [2021-06-05 03:48:23,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 03:48:23,448 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:48:23,448 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:48:23,448 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-06-05 03:48:23,448 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:48:23,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:48:23,448 INFO L82 PathProgramCache]: Analyzing trace with hash 215291064, now seen corresponding path program 3 times [2021-06-05 03:48:23,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:48:23,448 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364449837] [2021-06-05 03:48:23,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:48:23,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:48:23,479 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:48:23,479 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:48:23,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364449837] [2021-06-05 03:48:23,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364449837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:48:23,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532459318] [2021-06-05 03:48:23,479 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:48:23,510 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 03:48:23,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:48:23,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 03:48:23,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:48:23,647 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:48:23,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532459318] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 03:48:23,648 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 03:48:23,648 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [5] total 12 [2021-06-05 03:48:23,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87464370] [2021-06-05 03:48:23,648 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 03:48:23,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:48:23,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 03:48:23,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:48:23,648 INFO L87 Difference]: Start difference. First operand 222 states and 527 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:23,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:48:23,782 INFO L93 Difference]: Finished difference Result 421 states and 987 transitions. [2021-06-05 03:48:23,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 03:48:23,782 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 03:48:23,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:48:23,784 INFO L225 Difference]: With dead ends: 421 [2021-06-05 03:48:23,784 INFO L226 Difference]: Without dead ends: 414 [2021-06-05 03:48:23,784 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 151.8ms TimeCoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2021-06-05 03:48:23,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-06-05 03:48:23,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 278. [2021-06-05 03:48:23,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 277 states have (on average 2.4151624548736463) internal successors, (669), 277 states have internal predecessors, (669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:23,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 669 transitions. [2021-06-05 03:48:23,789 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 669 transitions. Word has length 20 [2021-06-05 03:48:23,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:48:23,789 INFO L482 AbstractCegarLoop]: Abstraction has 278 states and 669 transitions. [2021-06-05 03:48:23,789 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:23,789 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 669 transitions. [2021-06-05 03:48:23,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 03:48:23,790 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:48:23,790 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:48:24,003 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:48:24,004 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:48:24,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:48:24,004 INFO L82 PathProgramCache]: Analyzing trace with hash -2043788104, now seen corresponding path program 4 times [2021-06-05 03:48:24,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:48:24,004 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125448261] [2021-06-05 03:48:24,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:48:24,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:48:24,041 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:48:24,041 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:48:24,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125448261] [2021-06-05 03:48:24,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125448261] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:48:24,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561046577] [2021-06-05 03:48:24,042 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:48:24,068 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:48:24,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:48:24,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 03:48:24,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:48:24,168 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:48:24,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561046577] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 03:48:24,168 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 03:48:24,168 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 8 [2021-06-05 03:48:24,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584330128] [2021-06-05 03:48:24,170 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 03:48:24,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:48:24,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 03:48:24,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-05 03:48:24,171 INFO L87 Difference]: Start difference. First operand 278 states and 669 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:24,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:48:24,283 INFO L93 Difference]: Finished difference Result 592 states and 1376 transitions. [2021-06-05 03:48:24,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 03:48:24,283 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 03:48:24,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:48:24,285 INFO L225 Difference]: With dead ends: 592 [2021-06-05 03:48:24,285 INFO L226 Difference]: Without dead ends: 592 [2021-06-05 03:48:24,286 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 62.2ms TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2021-06-05 03:48:24,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2021-06-05 03:48:24,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 376. [2021-06-05 03:48:24,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 375 states have (on average 2.541333333333333) internal successors, (953), 375 states have internal predecessors, (953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:24,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 953 transitions. [2021-06-05 03:48:24,294 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 953 transitions. Word has length 20 [2021-06-05 03:48:24,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:48:24,294 INFO L482 AbstractCegarLoop]: Abstraction has 376 states and 953 transitions. [2021-06-05 03:48:24,294 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:24,294 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 953 transitions. [2021-06-05 03:48:24,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 03:48:24,295 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:48:24,295 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:48:24,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-05 03:48:24,501 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:48:24,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:48:24,501 INFO L82 PathProgramCache]: Analyzing trace with hash -1610963566, now seen corresponding path program 5 times [2021-06-05 03:48:24,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:48:24,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034538729] [2021-06-05 03:48:24,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:48:24,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:48:24,549 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:48:24,550 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:48:24,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034538729] [2021-06-05 03:48:24,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034538729] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:48:24,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592944813] [2021-06-05 03:48:24,550 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:48:24,572 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 03:48:24,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:48:24,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 03:48:24,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:48:24,622 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:48:24,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592944813] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:48:24,623 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:48:24,623 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 6 [2021-06-05 03:48:24,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959065447] [2021-06-05 03:48:24,624 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 03:48:24,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:48:24,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 03:48:24,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 03:48:24,625 INFO L87 Difference]: Start difference. First operand 376 states and 953 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:24,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:48:24,754 INFO L93 Difference]: Finished difference Result 751 states and 1816 transitions. [2021-06-05 03:48:24,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 03:48:24,757 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 03:48:24,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:48:24,759 INFO L225 Difference]: With dead ends: 751 [2021-06-05 03:48:24,759 INFO L226 Difference]: Without dead ends: 751 [2021-06-05 03:48:24,759 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 57.2ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-06-05 03:48:24,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 751 states. [2021-06-05 03:48:24,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 751 to 527. [2021-06-05 03:48:24,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 527 states, 526 states have (on average 2.659695817490494) internal successors, (1399), 526 states have internal predecessors, (1399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:24,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 1399 transitions. [2021-06-05 03:48:24,770 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 1399 transitions. Word has length 20 [2021-06-05 03:48:24,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:48:24,770 INFO L482 AbstractCegarLoop]: Abstraction has 527 states and 1399 transitions. [2021-06-05 03:48:24,771 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:24,771 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 1399 transitions. [2021-06-05 03:48:24,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 03:48:24,773 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:48:24,773 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:48:24,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:48:24,985 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:48:24,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:48:24,985 INFO L82 PathProgramCache]: Analyzing trace with hash 1876435461, now seen corresponding path program 6 times [2021-06-05 03:48:24,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:48:24,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533004444] [2021-06-05 03:48:24,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:48:24,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:48:25,007 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:48:25,007 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:48:25,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533004444] [2021-06-05 03:48:25,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533004444] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:48:25,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313157063] [2021-06-05 03:48:25,008 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:48:25,034 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 03:48:25,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:48:25,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 03:48:25,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:48:25,074 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:48:25,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313157063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:48:25,074 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:48:25,074 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 5 [2021-06-05 03:48:25,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705231742] [2021-06-05 03:48:25,074 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 03:48:25,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:48:25,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 03:48:25,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 03:48:25,075 INFO L87 Difference]: Start difference. First operand 527 states and 1399 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:25,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:48:25,141 INFO L93 Difference]: Finished difference Result 960 states and 2485 transitions. [2021-06-05 03:48:25,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 03:48:25,141 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 03:48:25,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:48:25,145 INFO L225 Difference]: With dead ends: 960 [2021-06-05 03:48:25,145 INFO L226 Difference]: Without dead ends: 956 [2021-06-05 03:48:25,145 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 20.9ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 03:48:25,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 956 states. [2021-06-05 03:48:25,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 956 to 785. [2021-06-05 03:48:25,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 785 states, 784 states have (on average 2.752551020408163) internal successors, (2158), 784 states have internal predecessors, (2158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:25,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 785 states to 785 states and 2158 transitions. [2021-06-05 03:48:25,165 INFO L78 Accepts]: Start accepts. Automaton has 785 states and 2158 transitions. Word has length 20 [2021-06-05 03:48:25,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:48:25,165 INFO L482 AbstractCegarLoop]: Abstraction has 785 states and 2158 transitions. [2021-06-05 03:48:25,165 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:25,165 INFO L276 IsEmpty]: Start isEmpty. Operand 785 states and 2158 transitions. [2021-06-05 03:48:25,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 03:48:25,167 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:48:25,167 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:48:25,385 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:48:25,385 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:48:25,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:48:25,385 INFO L82 PathProgramCache]: Analyzing trace with hash 1254555051, now seen corresponding path program 7 times [2021-06-05 03:48:25,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:48:25,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523488037] [2021-06-05 03:48:25,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:48:25,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:48:25,409 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:48:25,409 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:48:25,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523488037] [2021-06-05 03:48:25,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523488037] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:48:25,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810523788] [2021-06-05 03:48:25,410 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:48:25,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:48:25,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 03:48:25,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:48:25,470 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:48:25,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810523788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:48:25,471 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:48:25,471 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 5 [2021-06-05 03:48:25,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684635204] [2021-06-05 03:48:25,471 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 03:48:25,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:48:25,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 03:48:25,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 03:48:25,472 INFO L87 Difference]: Start difference. First operand 785 states and 2158 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:25,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:48:25,546 INFO L93 Difference]: Finished difference Result 966 states and 2482 transitions. [2021-06-05 03:48:25,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 03:48:25,546 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 03:48:25,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:48:25,549 INFO L225 Difference]: With dead ends: 966 [2021-06-05 03:48:25,549 INFO L226 Difference]: Without dead ends: 966 [2021-06-05 03:48:25,550 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 32.4ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 03:48:25,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 966 states. [2021-06-05 03:48:25,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 966 to 785. [2021-06-05 03:48:25,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 785 states, 784 states have (on average 2.739795918367347) internal successors, (2148), 784 states have internal predecessors, (2148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:25,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 785 states to 785 states and 2148 transitions. [2021-06-05 03:48:25,569 INFO L78 Accepts]: Start accepts. Automaton has 785 states and 2148 transitions. Word has length 20 [2021-06-05 03:48:25,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:48:25,569 INFO L482 AbstractCegarLoop]: Abstraction has 785 states and 2148 transitions. [2021-06-05 03:48:25,569 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:25,569 INFO L276 IsEmpty]: Start isEmpty. Operand 785 states and 2148 transitions. [2021-06-05 03:48:25,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 03:48:25,571 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:48:25,571 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:48:25,785 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-05 03:48:25,785 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:48:25,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:48:25,785 INFO L82 PathProgramCache]: Analyzing trace with hash 322738604, now seen corresponding path program 8 times [2021-06-05 03:48:25,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:48:25,786 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710453493] [2021-06-05 03:48:25,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:48:25,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:48:25,815 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:48:25,815 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:48:25,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710453493] [2021-06-05 03:48:25,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710453493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:48:25,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151817529] [2021-06-05 03:48:25,816 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:48:25,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:48:25,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:48:25,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 03:48:25,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:48:25,877 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:48:25,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151817529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:48:25,877 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:48:25,877 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-05 03:48:25,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059676279] [2021-06-05 03:48:25,877 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 03:48:25,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:48:25,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 03:48:25,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 03:48:25,878 INFO L87 Difference]: Start difference. First operand 785 states and 2148 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:25,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:48:25,922 INFO L93 Difference]: Finished difference Result 861 states and 2300 transitions. [2021-06-05 03:48:25,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 03:48:25,922 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 03:48:25,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:48:25,925 INFO L225 Difference]: With dead ends: 861 [2021-06-05 03:48:25,925 INFO L226 Difference]: Without dead ends: 858 [2021-06-05 03:48:25,925 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 17.9ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 03:48:25,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 858 states. [2021-06-05 03:48:25,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 858 to 781. [2021-06-05 03:48:25,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 781 states, 780 states have (on average 2.7346153846153847) internal successors, (2133), 780 states have internal predecessors, (2133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:25,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 781 states to 781 states and 2133 transitions. [2021-06-05 03:48:25,952 INFO L78 Accepts]: Start accepts. Automaton has 781 states and 2133 transitions. Word has length 20 [2021-06-05 03:48:25,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:48:25,952 INFO L482 AbstractCegarLoop]: Abstraction has 781 states and 2133 transitions. [2021-06-05 03:48:25,952 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:25,952 INFO L276 IsEmpty]: Start isEmpty. Operand 781 states and 2133 transitions. [2021-06-05 03:48:25,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 03:48:25,953 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:48:25,953 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:48:26,171 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:48:26,171 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:48:26,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:48:26,171 INFO L82 PathProgramCache]: Analyzing trace with hash -1057166664, now seen corresponding path program 9 times [2021-06-05 03:48:26,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:48:26,171 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431464851] [2021-06-05 03:48:26,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:48:26,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:48:26,193 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:48:26,193 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:48:26,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431464851] [2021-06-05 03:48:26,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431464851] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:48:26,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430907702] [2021-06-05 03:48:26,193 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:48:26,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 03:48:26,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:48:26,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 03:48:26,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:48:26,255 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:48:26,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430907702] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:48:26,255 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:48:26,255 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-05 03:48:26,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662528412] [2021-06-05 03:48:26,255 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 03:48:26,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:48:26,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 03:48:26,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 03:48:26,256 INFO L87 Difference]: Start difference. First operand 781 states and 2133 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:26,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:48:26,323 INFO L93 Difference]: Finished difference Result 1114 states and 2914 transitions. [2021-06-05 03:48:26,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 03:48:26,324 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 03:48:26,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:48:26,327 INFO L225 Difference]: With dead ends: 1114 [2021-06-05 03:48:26,327 INFO L226 Difference]: Without dead ends: 1114 [2021-06-05 03:48:26,327 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 26.7ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 03:48:26,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1114 states. [2021-06-05 03:48:26,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1114 to 899. [2021-06-05 03:48:26,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 899 states, 898 states have (on average 2.771714922048998) internal successors, (2489), 898 states have internal predecessors, (2489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:26,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 2489 transitions. [2021-06-05 03:48:26,344 INFO L78 Accepts]: Start accepts. Automaton has 899 states and 2489 transitions. Word has length 20 [2021-06-05 03:48:26,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:48:26,344 INFO L482 AbstractCegarLoop]: Abstraction has 899 states and 2489 transitions. [2021-06-05 03:48:26,344 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:26,344 INFO L276 IsEmpty]: Start isEmpty. Operand 899 states and 2489 transitions. [2021-06-05 03:48:26,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 03:48:26,345 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:48:26,345 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:48:26,556 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-06-05 03:48:26,557 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:48:26,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:48:26,557 INFO L82 PathProgramCache]: Analyzing trace with hash -1634542869, now seen corresponding path program 10 times [2021-06-05 03:48:26,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:48:26,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906361898] [2021-06-05 03:48:26,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:48:26,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:48:26,580 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:48:26,581 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:48:26,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906361898] [2021-06-05 03:48:26,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906361898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:48:26,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253675584] [2021-06-05 03:48:26,581 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:48:26,605 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:48:26,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:48:26,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 03:48:26,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:48:26,640 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:48:26,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253675584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:48:26,640 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:48:26,641 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 5 [2021-06-05 03:48:26,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154926024] [2021-06-05 03:48:26,641 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 03:48:26,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:48:26,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 03:48:26,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 03:48:26,641 INFO L87 Difference]: Start difference. First operand 899 states and 2489 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:26,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:48:26,708 INFO L93 Difference]: Finished difference Result 1380 states and 3776 transitions. [2021-06-05 03:48:26,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 03:48:26,708 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 03:48:26,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:48:26,713 INFO L225 Difference]: With dead ends: 1380 [2021-06-05 03:48:26,713 INFO L226 Difference]: Without dead ends: 1370 [2021-06-05 03:48:26,713 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 29.4ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-06-05 03:48:26,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1370 states. [2021-06-05 03:48:26,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1370 to 1228. [2021-06-05 03:48:26,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1228 states, 1227 states have (on average 2.8247758761206194) internal successors, (3466), 1227 states have internal predecessors, (3466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:26,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1228 states to 1228 states and 3466 transitions. [2021-06-05 03:48:26,735 INFO L78 Accepts]: Start accepts. Automaton has 1228 states and 3466 transitions. Word has length 20 [2021-06-05 03:48:26,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:48:26,735 INFO L482 AbstractCegarLoop]: Abstraction has 1228 states and 3466 transitions. [2021-06-05 03:48:26,735 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:26,736 INFO L276 IsEmpty]: Start isEmpty. Operand 1228 states and 3466 transitions. [2021-06-05 03:48:26,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 03:48:26,737 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:48:26,737 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:48:26,953 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-05 03:48:26,953 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:48:26,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:48:26,953 INFO L82 PathProgramCache]: Analyzing trace with hash 2038544017, now seen corresponding path program 11 times [2021-06-05 03:48:26,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:48:26,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104079444] [2021-06-05 03:48:26,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:48:26,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:48:26,974 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:48:26,974 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:48:26,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104079444] [2021-06-05 03:48:26,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104079444] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:48:26,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263994291] [2021-06-05 03:48:26,975 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:48:27,002 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 03:48:27,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:48:27,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 03:48:27,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:48:27,035 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:48:27,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263994291] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:48:27,035 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:48:27,035 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 5 [2021-06-05 03:48:27,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498494026] [2021-06-05 03:48:27,035 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 03:48:27,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:48:27,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 03:48:27,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 03:48:27,036 INFO L87 Difference]: Start difference. First operand 1228 states and 3466 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:27,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:48:27,118 INFO L93 Difference]: Finished difference Result 1400 states and 3809 transitions. [2021-06-05 03:48:27,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 03:48:27,119 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 03:48:27,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:48:27,123 INFO L225 Difference]: With dead ends: 1400 [2021-06-05 03:48:27,123 INFO L226 Difference]: Without dead ends: 1400 [2021-06-05 03:48:27,123 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 29.2ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-06-05 03:48:27,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1400 states. [2021-06-05 03:48:27,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1400 to 1248. [2021-06-05 03:48:27,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1248 states, 1247 states have (on average 2.814755412991179) internal successors, (3510), 1247 states have internal predecessors, (3510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:27,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1248 states to 1248 states and 3510 transitions. [2021-06-05 03:48:27,142 INFO L78 Accepts]: Start accepts. Automaton has 1248 states and 3510 transitions. Word has length 20 [2021-06-05 03:48:27,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:48:27,143 INFO L482 AbstractCegarLoop]: Abstraction has 1248 states and 3510 transitions. [2021-06-05 03:48:27,143 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:27,143 INFO L276 IsEmpty]: Start isEmpty. Operand 1248 states and 3510 transitions. [2021-06-05 03:48:27,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 03:48:27,144 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:48:27,144 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:48:27,362 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-05 03:48:27,362 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:48:27,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:48:27,362 INFO L82 PathProgramCache]: Analyzing trace with hash 1106727570, now seen corresponding path program 12 times [2021-06-05 03:48:27,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:48:27,363 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144724847] [2021-06-05 03:48:27,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:48:27,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:48:27,385 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:48:27,385 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:48:27,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144724847] [2021-06-05 03:48:27,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144724847] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:48:27,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671241267] [2021-06-05 03:48:27,385 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:48:27,406 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 03:48:27,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:48:27,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 03:48:27,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:48:27,455 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:48:27,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671241267] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:48:27,455 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:48:27,455 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-05 03:48:27,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309503529] [2021-06-05 03:48:27,455 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 03:48:27,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:48:27,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 03:48:27,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 03:48:27,456 INFO L87 Difference]: Start difference. First operand 1248 states and 3510 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:27,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:48:27,500 INFO L93 Difference]: Finished difference Result 1485 states and 3980 transitions. [2021-06-05 03:48:27,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 03:48:27,501 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 03:48:27,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:48:27,505 INFO L225 Difference]: With dead ends: 1485 [2021-06-05 03:48:27,505 INFO L226 Difference]: Without dead ends: 1482 [2021-06-05 03:48:27,505 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 16.6ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-05 03:48:27,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1482 states. [2021-06-05 03:48:27,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1482 to 1250. [2021-06-05 03:48:27,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1250 states, 1249 states have (on average 2.8086469175340274) internal successors, (3508), 1249 states have internal predecessors, (3508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:27,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1250 states to 1250 states and 3508 transitions. [2021-06-05 03:48:27,525 INFO L78 Accepts]: Start accepts. Automaton has 1250 states and 3508 transitions. Word has length 20 [2021-06-05 03:48:27,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:48:27,526 INFO L482 AbstractCegarLoop]: Abstraction has 1250 states and 3508 transitions. [2021-06-05 03:48:27,526 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:27,526 INFO L276 IsEmpty]: Start isEmpty. Operand 1250 states and 3508 transitions. [2021-06-05 03:48:27,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 03:48:27,527 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:48:27,527 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:48:27,743 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:48:27,743 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:48:27,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:48:27,743 INFO L82 PathProgramCache]: Analyzing trace with hash 400971561, now seen corresponding path program 13 times [2021-06-05 03:48:27,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:48:27,743 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921166880] [2021-06-05 03:48:27,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:48:27,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:48:27,773 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:48:27,774 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:48:27,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921166880] [2021-06-05 03:48:27,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921166880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:48:27,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6542557] [2021-06-05 03:48:27,774 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:48:27,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:48:27,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 03:48:27,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:48:27,863 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:48:27,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6542557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:48:27,863 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:48:27,864 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 6 [2021-06-05 03:48:27,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585508480] [2021-06-05 03:48:27,865 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 03:48:27,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:48:27,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 03:48:27,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 03:48:27,865 INFO L87 Difference]: Start difference. First operand 1250 states and 3508 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:27,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:48:27,964 INFO L93 Difference]: Finished difference Result 1426 states and 3852 transitions. [2021-06-05 03:48:27,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 03:48:27,964 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 03:48:27,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:48:27,968 INFO L225 Difference]: With dead ends: 1426 [2021-06-05 03:48:27,968 INFO L226 Difference]: Without dead ends: 1426 [2021-06-05 03:48:27,969 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 42.6ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-06-05 03:48:27,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1426 states. [2021-06-05 03:48:27,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1426 to 1193. [2021-06-05 03:48:27,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1193 states, 1192 states have (on average 2.8003355704697985) internal successors, (3338), 1192 states have internal predecessors, (3338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:27,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1193 states to 1193 states and 3338 transitions. [2021-06-05 03:48:27,986 INFO L78 Accepts]: Start accepts. Automaton has 1193 states and 3338 transitions. Word has length 20 [2021-06-05 03:48:27,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:48:27,986 INFO L482 AbstractCegarLoop]: Abstraction has 1193 states and 3338 transitions. [2021-06-05 03:48:27,987 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:27,987 INFO L276 IsEmpty]: Start isEmpty. Operand 1193 states and 3338 transitions. [2021-06-05 03:48:27,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 03:48:27,988 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:48:27,988 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:48:28,203 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:48:28,204 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:48:28,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:48:28,204 INFO L82 PathProgramCache]: Analyzing trace with hash 1313790136, now seen corresponding path program 14 times [2021-06-05 03:48:28,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:48:28,204 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544822939] [2021-06-05 03:48:28,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:48:28,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:48:28,232 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:48:28,233 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:48:28,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544822939] [2021-06-05 03:48:28,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544822939] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:48:28,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136742554] [2021-06-05 03:48:28,233 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:48:28,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:48:28,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:48:28,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 03:48:28,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:48:28,286 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:48:28,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136742554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:48:28,286 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:48:28,286 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-05 03:48:28,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508638310] [2021-06-05 03:48:28,286 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 03:48:28,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:48:28,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 03:48:28,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 03:48:28,287 INFO L87 Difference]: Start difference. First operand 1193 states and 3338 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:28,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:48:28,343 INFO L93 Difference]: Finished difference Result 1396 states and 3748 transitions. [2021-06-05 03:48:28,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 03:48:28,344 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 03:48:28,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:48:28,348 INFO L225 Difference]: With dead ends: 1396 [2021-06-05 03:48:28,348 INFO L226 Difference]: Without dead ends: 1382 [2021-06-05 03:48:28,348 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 29.3ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 03:48:28,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1382 states. [2021-06-05 03:48:28,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1382 to 1217. [2021-06-05 03:48:28,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1217 states, 1216 states have (on average 2.7779605263157894) internal successors, (3378), 1216 states have internal predecessors, (3378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:28,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1217 states to 1217 states and 3378 transitions. [2021-06-05 03:48:28,364 INFO L78 Accepts]: Start accepts. Automaton has 1217 states and 3378 transitions. Word has length 20 [2021-06-05 03:48:28,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:48:28,365 INFO L482 AbstractCegarLoop]: Abstraction has 1217 states and 3378 transitions. [2021-06-05 03:48:28,365 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:28,365 INFO L276 IsEmpty]: Start isEmpty. Operand 1217 states and 3378 transitions. [2021-06-05 03:48:28,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 03:48:28,366 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:48:28,366 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:48:28,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-06-05 03:48:28,581 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:48:28,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:48:28,581 INFO L82 PathProgramCache]: Analyzing trace with hash -1149983723, now seen corresponding path program 1 times [2021-06-05 03:48:28,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:48:28,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451800520] [2021-06-05 03:48:28,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:48:28,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:48:28,621 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:48:28,622 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:48:28,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451800520] [2021-06-05 03:48:28,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451800520] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:48:28,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640425229] [2021-06-05 03:48:28,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:48:28,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:48:28,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 03:48:28,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:48:28,708 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:48:28,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640425229] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:48:28,708 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:48:28,708 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-06-05 03:48:28,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826839852] [2021-06-05 03:48:28,708 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 03:48:28,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:48:28,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 03:48:28,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 03:48:28,709 INFO L87 Difference]: Start difference. First operand 1217 states and 3378 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:28,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:48:28,977 INFO L93 Difference]: Finished difference Result 1620 states and 4189 transitions. [2021-06-05 03:48:28,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 03:48:28,978 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 03:48:28,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:48:28,982 INFO L225 Difference]: With dead ends: 1620 [2021-06-05 03:48:28,982 INFO L226 Difference]: Without dead ends: 1620 [2021-06-05 03:48:28,982 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 159.8ms TimeCoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2021-06-05 03:48:28,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1620 states. [2021-06-05 03:48:28,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1620 to 1363. [2021-06-05 03:48:28,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1363 states, 1362 states have (on average 2.6908957415565347) internal successors, (3665), 1362 states have internal predecessors, (3665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:29,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1363 states to 1363 states and 3665 transitions. [2021-06-05 03:48:29,000 INFO L78 Accepts]: Start accepts. Automaton has 1363 states and 3665 transitions. Word has length 23 [2021-06-05 03:48:29,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:48:29,001 INFO L482 AbstractCegarLoop]: Abstraction has 1363 states and 3665 transitions. [2021-06-05 03:48:29,001 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:29,001 INFO L276 IsEmpty]: Start isEmpty. Operand 1363 states and 3665 transitions. [2021-06-05 03:48:29,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 03:48:29,002 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:48:29,002 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:48:29,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:48:29,217 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:48:29,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:48:29,217 INFO L82 PathProgramCache]: Analyzing trace with hash -1870263307, now seen corresponding path program 15 times [2021-06-05 03:48:29,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:48:29,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819868495] [2021-06-05 03:48:29,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:48:29,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:48:29,251 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:48:29,251 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:48:29,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819868495] [2021-06-05 03:48:29,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819868495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:48:29,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449253112] [2021-06-05 03:48:29,251 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:48:29,281 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 03:48:29,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:48:29,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 03:48:29,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:48:29,323 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:48:29,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449253112] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:48:29,323 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:48:29,323 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-05 03:48:29,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608135639] [2021-06-05 03:48:29,323 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 03:48:29,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:48:29,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 03:48:29,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 03:48:29,324 INFO L87 Difference]: Start difference. First operand 1363 states and 3665 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:29,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:48:29,394 INFO L93 Difference]: Finished difference Result 1903 states and 5027 transitions. [2021-06-05 03:48:29,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 03:48:29,394 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 03:48:29,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:48:29,400 INFO L225 Difference]: With dead ends: 1903 [2021-06-05 03:48:29,400 INFO L226 Difference]: Without dead ends: 1896 [2021-06-05 03:48:29,400 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.3ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 03:48:29,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1896 states. [2021-06-05 03:48:29,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1896 to 1797. [2021-06-05 03:48:29,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1797 states, 1796 states have (on average 2.693207126948775) internal successors, (4837), 1796 states have internal predecessors, (4837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:29,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1797 states to 1797 states and 4837 transitions. [2021-06-05 03:48:29,427 INFO L78 Accepts]: Start accepts. Automaton has 1797 states and 4837 transitions. Word has length 23 [2021-06-05 03:48:29,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:48:29,427 INFO L482 AbstractCegarLoop]: Abstraction has 1797 states and 4837 transitions. [2021-06-05 03:48:29,427 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:29,427 INFO L276 IsEmpty]: Start isEmpty. Operand 1797 states and 4837 transitions. [2021-06-05 03:48:29,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 03:48:29,429 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:48:29,429 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:48:29,646 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-05 03:48:29,647 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:48:29,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:48:29,647 INFO L82 PathProgramCache]: Analyzing trace with hash -877014541, now seen corresponding path program 16 times [2021-06-05 03:48:29,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:48:29,647 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066747715] [2021-06-05 03:48:29,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:48:29,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:48:29,676 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 03:48:29,676 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:48:29,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066747715] [2021-06-05 03:48:29,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066747715] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:48:29,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945892590] [2021-06-05 03:48:29,676 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 03:48:29,708 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:48:29,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:48:29,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 03:48:29,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:48:29,750 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 03:48:29,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945892590] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:48:29,750 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:48:29,750 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-05 03:48:29,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971781872] [2021-06-05 03:48:29,751 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 03:48:29,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:48:29,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 03:48:29,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 03:48:29,752 INFO L87 Difference]: Start difference. First operand 1797 states and 4837 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:29,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:48:29,808 INFO L93 Difference]: Finished difference Result 2099 states and 5565 transitions. [2021-06-05 03:48:29,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 03:48:29,808 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 03:48:29,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:48:29,812 INFO L225 Difference]: With dead ends: 2099 [2021-06-05 03:48:29,812 INFO L226 Difference]: Without dead ends: 2092 [2021-06-05 03:48:29,812 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.7ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 03:48:29,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2092 states. [2021-06-05 03:48:29,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2092 to 1863. [2021-06-05 03:48:29,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1863 states, 1862 states have (on average 2.700859291084855) internal successors, (5029), 1862 states have internal predecessors, (5029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:29,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1863 states to 1863 states and 5029 transitions. [2021-06-05 03:48:29,839 INFO L78 Accepts]: Start accepts. Automaton has 1863 states and 5029 transitions. Word has length 23 [2021-06-05 03:48:29,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:48:29,840 INFO L482 AbstractCegarLoop]: Abstraction has 1863 states and 5029 transitions. [2021-06-05 03:48:29,840 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:29,840 INFO L276 IsEmpty]: Start isEmpty. Operand 1863 states and 5029 transitions. [2021-06-05 03:48:29,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 03:48:29,842 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:48:29,842 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:48:30,057 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-06-05 03:48:30,057 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:48:30,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:48:30,057 INFO L82 PathProgramCache]: Analyzing trace with hash 1516662741, now seen corresponding path program 1 times [2021-06-05 03:48:30,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:48:30,058 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664690725] [2021-06-05 03:48:30,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:48:30,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:48:30,106 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:48:30,106 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:48:30,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664690725] [2021-06-05 03:48:30,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664690725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:48:30,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729594105] [2021-06-05 03:48:30,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 03:48:30,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:48:30,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 11 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:48:30,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:48:30,189 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:48:30,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729594105] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:48:30,189 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:48:30,189 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-06-05 03:48:30,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490810075] [2021-06-05 03:48:30,189 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 03:48:30,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:48:30,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 03:48:30,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-05 03:48:30,190 INFO L87 Difference]: Start difference. First operand 1863 states and 5029 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:30,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:48:30,309 INFO L93 Difference]: Finished difference Result 1530 states and 4049 transitions. [2021-06-05 03:48:30,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 03:48:30,310 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 03:48:30,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:48:30,312 INFO L225 Difference]: With dead ends: 1530 [2021-06-05 03:48:30,312 INFO L226 Difference]: Without dead ends: 1391 [2021-06-05 03:48:30,313 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 66.6ms TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:48:30,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1391 states. [2021-06-05 03:48:30,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1391 to 1357. [2021-06-05 03:48:30,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1357 states, 1356 states have (on average 2.7109144542772863) internal successors, (3676), 1356 states have internal predecessors, (3676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:30,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1357 states to 1357 states and 3676 transitions. [2021-06-05 03:48:30,330 INFO L78 Accepts]: Start accepts. Automaton has 1357 states and 3676 transitions. Word has length 23 [2021-06-05 03:48:30,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:48:30,330 INFO L482 AbstractCegarLoop]: Abstraction has 1357 states and 3676 transitions. [2021-06-05 03:48:30,330 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:30,330 INFO L276 IsEmpty]: Start isEmpty. Operand 1357 states and 3676 transitions. [2021-06-05 03:48:30,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 03:48:30,332 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:48:30,332 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:48:30,545 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-06-05 03:48:30,545 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:48:30,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:48:30,545 INFO L82 PathProgramCache]: Analyzing trace with hash 2072587809, now seen corresponding path program 2 times [2021-06-05 03:48:30,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:48:30,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835620195] [2021-06-05 03:48:30,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:48:30,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:48:30,589 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:48:30,589 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:48:30,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835620195] [2021-06-05 03:48:30,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835620195] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:48:30,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911024273] [2021-06-05 03:48:30,590 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:48:30,617 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:48:30,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:48:30,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 03:48:30,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:48:30,671 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:48:30,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [911024273] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:48:30,672 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:48:30,672 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-06-05 03:48:30,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448027478] [2021-06-05 03:48:30,672 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 03:48:30,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:48:30,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 03:48:30,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-06-05 03:48:30,673 INFO L87 Difference]: Start difference. First operand 1357 states and 3676 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:30,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:48:30,811 INFO L93 Difference]: Finished difference Result 1538 states and 4021 transitions. [2021-06-05 03:48:30,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 03:48:30,811 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 03:48:30,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:48:30,814 INFO L225 Difference]: With dead ends: 1538 [2021-06-05 03:48:30,814 INFO L226 Difference]: Without dead ends: 1538 [2021-06-05 03:48:30,814 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 83.5ms TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:48:30,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1538 states. [2021-06-05 03:48:30,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1538 to 1383. [2021-06-05 03:48:30,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1383 states, 1382 states have (on average 2.703328509406657) internal successors, (3736), 1382 states have internal predecessors, (3736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:30,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1383 states to 1383 states and 3736 transitions. [2021-06-05 03:48:30,833 INFO L78 Accepts]: Start accepts. Automaton has 1383 states and 3736 transitions. Word has length 23 [2021-06-05 03:48:30,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:48:30,833 INFO L482 AbstractCegarLoop]: Abstraction has 1383 states and 3736 transitions. [2021-06-05 03:48:30,833 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:30,833 INFO L276 IsEmpty]: Start isEmpty. Operand 1383 states and 3736 transitions. [2021-06-05 03:48:30,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 03:48:30,834 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:48:30,834 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:48:31,050 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-05 03:48:31,050 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:48:31,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:48:31,050 INFO L82 PathProgramCache]: Analyzing trace with hash 1575503784, now seen corresponding path program 2 times [2021-06-05 03:48:31,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:48:31,050 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997271894] [2021-06-05 03:48:31,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:48:31,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:48:31,083 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:48:31,083 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:48:31,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997271894] [2021-06-05 03:48:31,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997271894] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:48:31,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951556112] [2021-06-05 03:48:31,083 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:48:31,104 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:48:31,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:48:31,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 03:48:31,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:48:31,149 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:48:31,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951556112] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:48:31,149 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:48:31,149 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 7 [2021-06-05 03:48:31,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316227171] [2021-06-05 03:48:31,149 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 03:48:31,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:48:31,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 03:48:31,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-06-05 03:48:31,150 INFO L87 Difference]: Start difference. First operand 1383 states and 3736 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:31,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:48:31,217 INFO L93 Difference]: Finished difference Result 1546 states and 4028 transitions. [2021-06-05 03:48:31,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 03:48:31,218 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 03:48:31,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:48:31,220 INFO L225 Difference]: With dead ends: 1546 [2021-06-05 03:48:31,220 INFO L226 Difference]: Without dead ends: 1526 [2021-06-05 03:48:31,220 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 41.0ms TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-05 03:48:31,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1526 states. [2021-06-05 03:48:31,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1526 to 1395. [2021-06-05 03:48:31,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1395 states, 1394 states have (on average 2.6886657101865135) internal successors, (3748), 1394 states have internal predecessors, (3748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:31,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1395 states to 1395 states and 3748 transitions. [2021-06-05 03:48:31,236 INFO L78 Accepts]: Start accepts. Automaton has 1395 states and 3748 transitions. Word has length 23 [2021-06-05 03:48:31,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:48:31,236 INFO L482 AbstractCegarLoop]: Abstraction has 1395 states and 3748 transitions. [2021-06-05 03:48:31,236 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:31,236 INFO L276 IsEmpty]: Start isEmpty. Operand 1395 states and 3748 transitions. [2021-06-05 03:48:31,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 03:48:31,238 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:48:31,238 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:48:31,453 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:48:31,453 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:48:31,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:48:31,453 INFO L82 PathProgramCache]: Analyzing trace with hash -1556804075, now seen corresponding path program 3 times [2021-06-05 03:48:31,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:48:31,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94380340] [2021-06-05 03:48:31,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:48:31,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:48:31,495 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:48:31,496 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:48:31,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94380340] [2021-06-05 03:48:31,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94380340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:48:31,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793420507] [2021-06-05 03:48:31,496 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:48:31,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 03:48:31,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:48:31,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 03:48:31,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:48:31,580 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:48:31,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793420507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:48:31,580 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:48:31,580 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-06-05 03:48:31,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315186344] [2021-06-05 03:48:31,580 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 03:48:31,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:48:31,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 03:48:31,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-06-05 03:48:31,581 INFO L87 Difference]: Start difference. First operand 1395 states and 3748 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:31,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:48:31,724 INFO L93 Difference]: Finished difference Result 1913 states and 4928 transitions. [2021-06-05 03:48:31,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 03:48:31,725 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 03:48:31,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:48:31,727 INFO L225 Difference]: With dead ends: 1913 [2021-06-05 03:48:31,727 INFO L226 Difference]: Without dead ends: 1913 [2021-06-05 03:48:31,727 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 68.9ms TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:48:31,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1913 states. [2021-06-05 03:48:31,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1913 to 1544. [2021-06-05 03:48:31,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1544 states, 1543 states have (on average 2.6824368114063515) internal successors, (4139), 1543 states have internal predecessors, (4139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:31,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1544 states to 1544 states and 4139 transitions. [2021-06-05 03:48:31,746 INFO L78 Accepts]: Start accepts. Automaton has 1544 states and 4139 transitions. Word has length 23 [2021-06-05 03:48:31,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:48:31,746 INFO L482 AbstractCegarLoop]: Abstraction has 1544 states and 4139 transitions. [2021-06-05 03:48:31,746 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:31,746 INFO L276 IsEmpty]: Start isEmpty. Operand 1544 states and 4139 transitions. [2021-06-05 03:48:31,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 03:48:31,748 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:48:31,748 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:48:31,963 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:48:31,964 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:48:31,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:48:31,964 INFO L82 PathProgramCache]: Analyzing trace with hash -56471083, now seen corresponding path program 3 times [2021-06-05 03:48:31,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:48:31,964 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544984472] [2021-06-05 03:48:31,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:48:31,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:48:31,998 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:48:31,998 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:48:31,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544984472] [2021-06-05 03:48:31,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544984472] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 03:48:31,998 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 03:48:31,998 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 03:48:31,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073806723] [2021-06-05 03:48:31,999 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 03:48:31,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:48:31,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 03:48:31,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 03:48:31,999 INFO L87 Difference]: Start difference. First operand 1544 states and 4139 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:32,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:48:32,036 INFO L93 Difference]: Finished difference Result 1492 states and 3879 transitions. [2021-06-05 03:48:32,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 03:48:32,037 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 03:48:32,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:48:32,039 INFO L225 Difference]: With dead ends: 1492 [2021-06-05 03:48:32,039 INFO L226 Difference]: Without dead ends: 1411 [2021-06-05 03:48:32,039 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.7ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 03:48:32,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1411 states. [2021-06-05 03:48:32,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1411 to 1381. [2021-06-05 03:48:32,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1381 states, 1380 states have (on average 2.6231884057971016) internal successors, (3620), 1380 states have internal predecessors, (3620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:32,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1381 states to 1381 states and 3620 transitions. [2021-06-05 03:48:32,055 INFO L78 Accepts]: Start accepts. Automaton has 1381 states and 3620 transitions. Word has length 23 [2021-06-05 03:48:32,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:48:32,055 INFO L482 AbstractCegarLoop]: Abstraction has 1381 states and 3620 transitions. [2021-06-05 03:48:32,055 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:32,055 INFO L276 IsEmpty]: Start isEmpty. Operand 1381 states and 3620 transitions. [2021-06-05 03:48:32,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 03:48:32,056 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:48:32,057 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:48:32,057 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2021-06-05 03:48:32,057 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:48:32,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:48:32,057 INFO L82 PathProgramCache]: Analyzing trace with hash -670007263, now seen corresponding path program 4 times [2021-06-05 03:48:32,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:48:32,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777392032] [2021-06-05 03:48:32,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:48:32,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:48:32,096 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:48:32,096 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:48:32,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777392032] [2021-06-05 03:48:32,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777392032] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:48:32,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163300193] [2021-06-05 03:48:32,096 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:48:32,135 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:48:32,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:48:32,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 03:48:32,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:48:32,194 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:48:32,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163300193] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:48:32,194 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:48:32,194 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-06-05 03:48:32,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607518489] [2021-06-05 03:48:32,194 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 03:48:32,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:48:32,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 03:48:32,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-06-05 03:48:32,195 INFO L87 Difference]: Start difference. First operand 1381 states and 3620 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:32,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:48:32,365 INFO L93 Difference]: Finished difference Result 1624 states and 4116 transitions. [2021-06-05 03:48:32,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 03:48:32,366 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 03:48:32,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:48:32,368 INFO L225 Difference]: With dead ends: 1624 [2021-06-05 03:48:32,368 INFO L226 Difference]: Without dead ends: 1612 [2021-06-05 03:48:32,368 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 80.4ms TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:48:32,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1612 states. [2021-06-05 03:48:32,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1612 to 1413. [2021-06-05 03:48:32,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1413 states, 1412 states have (on average 2.6203966005665724) internal successors, (3700), 1412 states have internal predecessors, (3700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:32,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1413 states to 1413 states and 3700 transitions. [2021-06-05 03:48:32,385 INFO L78 Accepts]: Start accepts. Automaton has 1413 states and 3700 transitions. Word has length 23 [2021-06-05 03:48:32,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:48:32,385 INFO L482 AbstractCegarLoop]: Abstraction has 1413 states and 3700 transitions. [2021-06-05 03:48:32,385 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:32,385 INFO L276 IsEmpty]: Start isEmpty. Operand 1413 states and 3700 transitions. [2021-06-05 03:48:32,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 03:48:32,387 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:48:32,387 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:48:32,603 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-06-05 03:48:32,603 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:48:32,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:48:32,603 INFO L82 PathProgramCache]: Analyzing trace with hash -819089257, now seen corresponding path program 17 times [2021-06-05 03:48:32,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:48:32,603 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077977964] [2021-06-05 03:48:32,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:48:32,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:48:32,626 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:48:32,626 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:48:32,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077977964] [2021-06-05 03:48:32,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077977964] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:48:32,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983365626] [2021-06-05 03:48:32,626 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:48:32,658 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 03:48:32,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:48:32,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 03:48:32,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:48:32,765 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:48:32,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983365626] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:48:32,765 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:48:32,765 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 9] total 11 [2021-06-05 03:48:32,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835736717] [2021-06-05 03:48:32,766 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 03:48:32,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:48:32,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 03:48:32,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:48:32,766 INFO L87 Difference]: Start difference. First operand 1413 states and 3700 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:33,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:48:33,185 INFO L93 Difference]: Finished difference Result 2940 states and 7390 transitions. [2021-06-05 03:48:33,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 03:48:33,185 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 03:48:33,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:48:33,189 INFO L225 Difference]: With dead ends: 2940 [2021-06-05 03:48:33,189 INFO L226 Difference]: Without dead ends: 2926 [2021-06-05 03:48:33,189 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 242.1ms TimeCoverageRelationStatistics Valid=161, Invalid=439, Unknown=0, NotChecked=0, Total=600 [2021-06-05 03:48:33,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2926 states. [2021-06-05 03:48:33,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2926 to 1583. [2021-06-05 03:48:33,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1583 states, 1582 states have (on average 2.618204804045512) internal successors, (4142), 1582 states have internal predecessors, (4142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:33,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1583 states to 1583 states and 4142 transitions. [2021-06-05 03:48:33,214 INFO L78 Accepts]: Start accepts. Automaton has 1583 states and 4142 transitions. Word has length 23 [2021-06-05 03:48:33,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:48:33,214 INFO L482 AbstractCegarLoop]: Abstraction has 1583 states and 4142 transitions. [2021-06-05 03:48:33,214 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:33,214 INFO L276 IsEmpty]: Start isEmpty. Operand 1583 states and 4142 transitions. [2021-06-05 03:48:33,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 03:48:33,216 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:48:33,216 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:48:33,428 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:48:33,429 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:48:33,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:48:33,429 INFO L82 PathProgramCache]: Analyzing trace with hash 1471910071, now seen corresponding path program 5 times [2021-06-05 03:48:33,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:48:33,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644544808] [2021-06-05 03:48:33,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:48:33,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:48:33,458 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:48:33,458 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:48:33,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644544808] [2021-06-05 03:48:33,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644544808] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:48:33,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794793286] [2021-06-05 03:48:33,458 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:48:33,494 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 03:48:33,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:48:33,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 03:48:33,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:48:33,556 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:48:33,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1794793286] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:48:33,557 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:48:33,557 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-06-05 03:48:33,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855447931] [2021-06-05 03:48:33,557 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 03:48:33,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:48:33,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 03:48:33,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 03:48:33,558 INFO L87 Difference]: Start difference. First operand 1583 states and 4142 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:33,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:48:33,826 INFO L93 Difference]: Finished difference Result 1758 states and 4409 transitions. [2021-06-05 03:48:33,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 03:48:33,826 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 03:48:33,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:48:33,829 INFO L225 Difference]: With dead ends: 1758 [2021-06-05 03:48:33,830 INFO L226 Difference]: Without dead ends: 1746 [2021-06-05 03:48:33,830 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 140.3ms TimeCoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2021-06-05 03:48:33,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1746 states. [2021-06-05 03:48:33,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1746 to 1437. [2021-06-05 03:48:33,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1437 states, 1436 states have (on average 2.597493036211699) internal successors, (3730), 1436 states have internal predecessors, (3730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:33,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1437 states to 1437 states and 3730 transitions. [2021-06-05 03:48:33,848 INFO L78 Accepts]: Start accepts. Automaton has 1437 states and 3730 transitions. Word has length 23 [2021-06-05 03:48:33,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:48:33,848 INFO L482 AbstractCegarLoop]: Abstraction has 1437 states and 3730 transitions. [2021-06-05 03:48:33,848 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:33,848 INFO L276 IsEmpty]: Start isEmpty. Operand 1437 states and 3730 transitions. [2021-06-05 03:48:33,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 03:48:33,849 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:48:33,849 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:48:34,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2021-06-05 03:48:34,065 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:48:34,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:48:34,065 INFO L82 PathProgramCache]: Analyzing trace with hash -1618050889, now seen corresponding path program 4 times [2021-06-05 03:48:34,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:48:34,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117809198] [2021-06-05 03:48:34,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:48:34,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:48:34,104 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:48:34,104 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:48:34,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117809198] [2021-06-05 03:48:34,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117809198] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:48:34,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70592402] [2021-06-05 03:48:34,104 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:48:34,135 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:48:34,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:48:34,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 03:48:34,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:48:34,188 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:48:34,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70592402] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:48:34,188 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:48:34,188 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-06-05 03:48:34,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816777547] [2021-06-05 03:48:34,190 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 03:48:34,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:48:34,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 03:48:34,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-05 03:48:34,190 INFO L87 Difference]: Start difference. First operand 1437 states and 3730 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:34,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:48:34,286 INFO L93 Difference]: Finished difference Result 1432 states and 3672 transitions. [2021-06-05 03:48:34,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 03:48:34,286 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 03:48:34,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:48:34,289 INFO L225 Difference]: With dead ends: 1432 [2021-06-05 03:48:34,289 INFO L226 Difference]: Without dead ends: 1365 [2021-06-05 03:48:34,289 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 69.4ms TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:48:34,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1365 states. [2021-06-05 03:48:34,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1365 to 1356. [2021-06-05 03:48:34,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1356 states, 1355 states have (on average 2.607380073800738) internal successors, (3533), 1355 states have internal predecessors, (3533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:34,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1356 states to 1356 states and 3533 transitions. [2021-06-05 03:48:34,303 INFO L78 Accepts]: Start accepts. Automaton has 1356 states and 3533 transitions. Word has length 23 [2021-06-05 03:48:34,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:48:34,303 INFO L482 AbstractCegarLoop]: Abstraction has 1356 states and 3533 transitions. [2021-06-05 03:48:34,303 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:34,304 INFO L276 IsEmpty]: Start isEmpty. Operand 1356 states and 3533 transitions. [2021-06-05 03:48:34,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 03:48:34,305 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:48:34,305 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:48:34,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:48:34,521 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:48:34,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:48:34,521 INFO L82 PathProgramCache]: Analyzing trace with hash 2131794949, now seen corresponding path program 18 times [2021-06-05 03:48:34,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:48:34,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935272438] [2021-06-05 03:48:34,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:48:34,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:48:34,570 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:48:34,570 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:48:34,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935272438] [2021-06-05 03:48:34,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935272438] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:48:34,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807484930] [2021-06-05 03:48:34,570 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:48:34,592 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 03:48:34,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:48:34,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 03:48:34,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:48:34,638 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:48:34,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807484930] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:48:34,639 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:48:34,639 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 03:48:34,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276268758] [2021-06-05 03:48:34,639 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 03:48:34,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:48:34,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 03:48:34,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-06-05 03:48:34,640 INFO L87 Difference]: Start difference. First operand 1356 states and 3533 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:34,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:48:34,784 INFO L93 Difference]: Finished difference Result 1715 states and 4244 transitions. [2021-06-05 03:48:34,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 03:48:34,784 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 03:48:34,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:48:34,786 INFO L225 Difference]: With dead ends: 1715 [2021-06-05 03:48:34,786 INFO L226 Difference]: Without dead ends: 1715 [2021-06-05 03:48:34,787 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 70.2ms TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:48:34,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1715 states. [2021-06-05 03:48:34,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1715 to 1404. [2021-06-05 03:48:34,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1404 states, 1403 states have (on average 2.6129722024233786) internal successors, (3666), 1403 states have internal predecessors, (3666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:34,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1404 states to 1404 states and 3666 transitions. [2021-06-05 03:48:34,802 INFO L78 Accepts]: Start accepts. Automaton has 1404 states and 3666 transitions. Word has length 26 [2021-06-05 03:48:34,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:48:34,802 INFO L482 AbstractCegarLoop]: Abstraction has 1404 states and 3666 transitions. [2021-06-05 03:48:34,802 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:34,802 INFO L276 IsEmpty]: Start isEmpty. Operand 1404 states and 3666 transitions. [2021-06-05 03:48:34,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 03:48:34,803 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:48:34,804 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:48:35,019 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-06-05 03:48:35,019 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:48:35,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:48:35,020 INFO L82 PathProgramCache]: Analyzing trace with hash 761307032, now seen corresponding path program 19 times [2021-06-05 03:48:35,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:48:35,020 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383801325] [2021-06-05 03:48:35,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:48:35,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:48:35,060 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:48:35,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:48:35,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383801325] [2021-06-05 03:48:35,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383801325] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:48:35,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45718299] [2021-06-05 03:48:35,060 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:48:35,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:48:35,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 03:48:35,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:48:35,136 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:48:35,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45718299] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:48:35,136 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:48:35,136 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 7 [2021-06-05 03:48:35,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172870212] [2021-06-05 03:48:35,136 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 03:48:35,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:48:35,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 03:48:35,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-06-05 03:48:35,137 INFO L87 Difference]: Start difference. First operand 1404 states and 3666 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:35,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:48:35,220 INFO L93 Difference]: Finished difference Result 2473 states and 6334 transitions. [2021-06-05 03:48:35,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 03:48:35,220 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 03:48:35,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:48:35,223 INFO L225 Difference]: With dead ends: 2473 [2021-06-05 03:48:35,223 INFO L226 Difference]: Without dead ends: 2455 [2021-06-05 03:48:35,223 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 38.3ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-06-05 03:48:35,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2455 states. [2021-06-05 03:48:35,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2455 to 2018. [2021-06-05 03:48:35,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2018 states, 2017 states have (on average 2.707982151710461) internal successors, (5462), 2017 states have internal predecessors, (5462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:35,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2018 states to 2018 states and 5462 transitions. [2021-06-05 03:48:35,247 INFO L78 Accepts]: Start accepts. Automaton has 2018 states and 5462 transitions. Word has length 26 [2021-06-05 03:48:35,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:48:35,247 INFO L482 AbstractCegarLoop]: Abstraction has 2018 states and 5462 transitions. [2021-06-05 03:48:35,247 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:35,247 INFO L276 IsEmpty]: Start isEmpty. Operand 2018 states and 5462 transitions. [2021-06-05 03:48:35,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 03:48:35,249 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:48:35,249 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:48:35,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:48:35,465 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:48:35,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:48:35,465 INFO L82 PathProgramCache]: Analyzing trace with hash -195885608, now seen corresponding path program 20 times [2021-06-05 03:48:35,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:48:35,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324583117] [2021-06-05 03:48:35,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:48:35,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:48:35,491 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:48:35,491 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:48:35,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324583117] [2021-06-05 03:48:35,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324583117] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:48:35,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908551998] [2021-06-05 03:48:35,491 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:48:35,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:48:35,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:48:35,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 03:48:35,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:48:35,565 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:48:35,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908551998] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:48:35,565 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:48:35,565 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 6 [2021-06-05 03:48:35,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373562819] [2021-06-05 03:48:35,565 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 03:48:35,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:48:35,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 03:48:35,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 03:48:35,566 INFO L87 Difference]: Start difference. First operand 2018 states and 5462 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:35,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:48:35,665 INFO L93 Difference]: Finished difference Result 2447 states and 6260 transitions. [2021-06-05 03:48:35,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 03:48:35,665 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 03:48:35,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:48:35,667 INFO L225 Difference]: With dead ends: 2447 [2021-06-05 03:48:35,667 INFO L226 Difference]: Without dead ends: 2447 [2021-06-05 03:48:35,667 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 42.2ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-06-05 03:48:35,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2447 states. [2021-06-05 03:48:35,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2447 to 1914. [2021-06-05 03:48:35,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1914 states, 1913 states have (on average 2.6905384213277577) internal successors, (5147), 1913 states have internal predecessors, (5147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:35,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1914 states to 1914 states and 5147 transitions. [2021-06-05 03:48:35,689 INFO L78 Accepts]: Start accepts. Automaton has 1914 states and 5147 transitions. Word has length 26 [2021-06-05 03:48:35,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:48:35,689 INFO L482 AbstractCegarLoop]: Abstraction has 1914 states and 5147 transitions. [2021-06-05 03:48:35,689 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:35,689 INFO L276 IsEmpty]: Start isEmpty. Operand 1914 states and 5147 transitions. [2021-06-05 03:48:35,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 03:48:35,691 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:48:35,691 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:48:35,900 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-06-05 03:48:35,901 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:48:35,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:48:35,901 INFO L82 PathProgramCache]: Analyzing trace with hash -1127702055, now seen corresponding path program 21 times [2021-06-05 03:48:35,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:48:35,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753947052] [2021-06-05 03:48:35,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:48:35,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:48:35,925 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:48:35,925 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:48:35,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753947052] [2021-06-05 03:48:35,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753947052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:48:35,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128030337] [2021-06-05 03:48:35,925 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:48:35,948 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 03:48:35,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:48:35,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 03:48:35,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:48:35,982 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:48:35,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128030337] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:48:35,983 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:48:35,983 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-05 03:48:35,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92660622] [2021-06-05 03:48:35,983 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 03:48:35,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:48:35,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 03:48:35,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 03:48:35,983 INFO L87 Difference]: Start difference. First operand 1914 states and 5147 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:36,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:48:36,049 INFO L93 Difference]: Finished difference Result 2092 states and 5497 transitions. [2021-06-05 03:48:36,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 03:48:36,050 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 03:48:36,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:48:36,052 INFO L225 Difference]: With dead ends: 2092 [2021-06-05 03:48:36,052 INFO L226 Difference]: Without dead ends: 2089 [2021-06-05 03:48:36,052 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 27.0ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 03:48:36,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2089 states. [2021-06-05 03:48:36,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2089 to 1899. [2021-06-05 03:48:36,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1899 states, 1898 states have (on average 2.684931506849315) internal successors, (5096), 1898 states have internal predecessors, (5096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:36,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1899 states to 1899 states and 5096 transitions. [2021-06-05 03:48:36,083 INFO L78 Accepts]: Start accepts. Automaton has 1899 states and 5096 transitions. Word has length 26 [2021-06-05 03:48:36,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:48:36,084 INFO L482 AbstractCegarLoop]: Abstraction has 1899 states and 5096 transitions. [2021-06-05 03:48:36,084 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:36,084 INFO L276 IsEmpty]: Start isEmpty. Operand 1899 states and 5096 transitions. [2021-06-05 03:48:36,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 03:48:36,088 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:48:36,088 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:48:36,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:48:36,304 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:48:36,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:48:36,304 INFO L82 PathProgramCache]: Analyzing trace with hash -1111998297, now seen corresponding path program 22 times [2021-06-05 03:48:36,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:48:36,304 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712645885] [2021-06-05 03:48:36,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:48:36,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:48:36,331 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:48:36,332 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:48:36,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712645885] [2021-06-05 03:48:36,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712645885] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:48:36,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317612377] [2021-06-05 03:48:36,332 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:48:36,353 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:48:36,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:48:36,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 03:48:36,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:48:36,396 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:48:36,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317612377] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:48:36,397 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:48:36,397 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-05 03:48:36,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056090236] [2021-06-05 03:48:36,397 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 03:48:36,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:48:36,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 03:48:36,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 03:48:36,398 INFO L87 Difference]: Start difference. First operand 1899 states and 5096 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:36,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:48:36,483 INFO L93 Difference]: Finished difference Result 2552 states and 6599 transitions. [2021-06-05 03:48:36,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 03:48:36,483 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 03:48:36,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:48:36,485 INFO L225 Difference]: With dead ends: 2552 [2021-06-05 03:48:36,485 INFO L226 Difference]: Without dead ends: 2552 [2021-06-05 03:48:36,486 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 35.9ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-05 03:48:36,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2552 states. [2021-06-05 03:48:36,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2552 to 2092. [2021-06-05 03:48:36,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2092 states, 2091 states have (on average 2.713534194165471) internal successors, (5674), 2091 states have internal predecessors, (5674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:36,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2092 states to 2092 states and 5674 transitions. [2021-06-05 03:48:36,509 INFO L78 Accepts]: Start accepts. Automaton has 2092 states and 5674 transitions. Word has length 26 [2021-06-05 03:48:36,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:48:36,509 INFO L482 AbstractCegarLoop]: Abstraction has 2092 states and 5674 transitions. [2021-06-05 03:48:36,509 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:36,509 INFO L276 IsEmpty]: Start isEmpty. Operand 2092 states and 5674 transitions. [2021-06-05 03:48:36,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 03:48:36,511 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:48:36,511 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:48:36,715 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-06-05 03:48:36,715 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:48:36,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:48:36,716 INFO L82 PathProgramCache]: Analyzing trace with hash -1689374502, now seen corresponding path program 23 times [2021-06-05 03:48:36,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:48:36,716 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214064241] [2021-06-05 03:48:36,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:48:36,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:48:36,740 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:48:36,740 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:48:36,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214064241] [2021-06-05 03:48:36,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214064241] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:48:36,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341010556] [2021-06-05 03:48:36,740 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:48:36,762 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 03:48:36,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:48:36,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 03:48:36,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:48:36,816 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:48:36,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341010556] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:48:36,817 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:48:36,817 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 7 [2021-06-05 03:48:36,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489741242] [2021-06-05 03:48:36,817 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 03:48:36,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:48:36,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 03:48:36,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 03:48:36,817 INFO L87 Difference]: Start difference. First operand 2092 states and 5674 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:36,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:48:36,903 INFO L93 Difference]: Finished difference Result 3728 states and 10027 transitions. [2021-06-05 03:48:36,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 03:48:36,904 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 03:48:36,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:48:36,907 INFO L225 Difference]: With dead ends: 3728 [2021-06-05 03:48:36,907 INFO L226 Difference]: Without dead ends: 3712 [2021-06-05 03:48:36,908 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 35.2ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-06-05 03:48:36,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3712 states. [2021-06-05 03:48:36,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3712 to 3201. [2021-06-05 03:48:36,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3201 states, 3200 states have (on average 2.8134375) internal successors, (9003), 3200 states have internal predecessors, (9003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:36,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3201 states to 3201 states and 9003 transitions. [2021-06-05 03:48:36,946 INFO L78 Accepts]: Start accepts. Automaton has 3201 states and 9003 transitions. Word has length 26 [2021-06-05 03:48:36,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:48:36,946 INFO L482 AbstractCegarLoop]: Abstraction has 3201 states and 9003 transitions. [2021-06-05 03:48:36,946 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:36,946 INFO L276 IsEmpty]: Start isEmpty. Operand 3201 states and 9003 transitions. [2021-06-05 03:48:36,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 03:48:36,948 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:48:36,949 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:48:37,164 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-06-05 03:48:37,164 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:48:37,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:48:37,165 INFO L82 PathProgramCache]: Analyzing trace with hash 1983712384, now seen corresponding path program 24 times [2021-06-05 03:48:37,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:48:37,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542476282] [2021-06-05 03:48:37,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:48:37,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:48:37,197 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:48:37,198 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:48:37,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542476282] [2021-06-05 03:48:37,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542476282] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:48:37,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965973334] [2021-06-05 03:48:37,198 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 03:48:37,221 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 03:48:37,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:48:37,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 03:48:37,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:48:37,261 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:48:37,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965973334] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:48:37,261 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:48:37,261 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 7 [2021-06-05 03:48:37,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403021749] [2021-06-05 03:48:37,262 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 03:48:37,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:48:37,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 03:48:37,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 03:48:37,262 INFO L87 Difference]: Start difference. First operand 3201 states and 9003 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:37,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:48:37,403 INFO L93 Difference]: Finished difference Result 3830 states and 10240 transitions. [2021-06-05 03:48:37,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 03:48:37,403 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 03:48:37,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:48:37,407 INFO L225 Difference]: With dead ends: 3830 [2021-06-05 03:48:37,407 INFO L226 Difference]: Without dead ends: 3830 [2021-06-05 03:48:37,407 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 45.9ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-06-05 03:48:37,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3830 states. [2021-06-05 03:48:37,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3830 to 3216. [2021-06-05 03:48:37,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3216 states, 3215 states have (on average 2.805909797822706) internal successors, (9021), 3215 states have internal predecessors, (9021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:37,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3216 states to 3216 states and 9021 transitions. [2021-06-05 03:48:37,451 INFO L78 Accepts]: Start accepts. Automaton has 3216 states and 9021 transitions. Word has length 26 [2021-06-05 03:48:37,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:48:37,451 INFO L482 AbstractCegarLoop]: Abstraction has 3216 states and 9021 transitions. [2021-06-05 03:48:37,451 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:37,451 INFO L276 IsEmpty]: Start isEmpty. Operand 3216 states and 9021 transitions. [2021-06-05 03:48:37,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 03:48:37,453 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:48:37,453 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:48:37,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:48:37,669 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:48:37,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:48:37,669 INFO L82 PathProgramCache]: Analyzing trace with hash 1051895937, now seen corresponding path program 25 times [2021-06-05 03:48:37,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:48:37,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754524010] [2021-06-05 03:48:37,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:48:37,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:48:37,696 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:48:37,696 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:48:37,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754524010] [2021-06-05 03:48:37,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754524010] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:48:37,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751038191] [2021-06-05 03:48:37,696 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:48:37,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:48:37,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 03:48:37,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:48:37,764 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:48:37,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751038191] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:48:37,765 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:48:37,765 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-05 03:48:37,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119243019] [2021-06-05 03:48:37,765 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 03:48:37,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:48:37,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 03:48:37,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 03:48:37,766 INFO L87 Difference]: Start difference. First operand 3216 states and 9021 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:37,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:48:37,846 INFO L93 Difference]: Finished difference Result 3629 states and 9839 transitions. [2021-06-05 03:48:37,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 03:48:37,846 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 03:48:37,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:48:37,850 INFO L225 Difference]: With dead ends: 3629 [2021-06-05 03:48:37,850 INFO L226 Difference]: Without dead ends: 3617 [2021-06-05 03:48:37,850 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 27.6ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-06-05 03:48:37,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3617 states. [2021-06-05 03:48:37,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3617 to 3079. [2021-06-05 03:48:37,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3079 states, 3078 states have (on average 2.7979207277452893) internal successors, (8612), 3078 states have internal predecessors, (8612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:37,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3079 states to 3079 states and 8612 transitions. [2021-06-05 03:48:37,884 INFO L78 Accepts]: Start accepts. Automaton has 3079 states and 8612 transitions. Word has length 26 [2021-06-05 03:48:37,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:48:37,884 INFO L482 AbstractCegarLoop]: Abstraction has 3079 states and 8612 transitions. [2021-06-05 03:48:37,884 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:37,884 INFO L276 IsEmpty]: Start isEmpty. Operand 3079 states and 8612 transitions. [2021-06-05 03:48:37,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 03:48:37,886 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:48:37,886 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:48:38,101 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-06-05 03:48:38,101 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:48:38,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:48:38,102 INFO L82 PathProgramCache]: Analyzing trace with hash 346139928, now seen corresponding path program 26 times [2021-06-05 03:48:38,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:48:38,102 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345059619] [2021-06-05 03:48:38,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:48:38,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:48:38,137 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:48:38,137 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:48:38,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345059619] [2021-06-05 03:48:38,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345059619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:48:38,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43617505] [2021-06-05 03:48:38,137 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:48:38,159 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:48:38,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:48:38,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 03:48:38,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:48:38,196 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:48:38,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43617505] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:48:38,197 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:48:38,197 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 7 [2021-06-05 03:48:38,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146040852] [2021-06-05 03:48:38,197 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 03:48:38,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:48:38,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 03:48:38,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-06-05 03:48:38,198 INFO L87 Difference]: Start difference. First operand 3079 states and 8612 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:38,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:48:38,319 INFO L93 Difference]: Finished difference Result 4208 states and 11364 transitions. [2021-06-05 03:48:38,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 03:48:38,320 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 03:48:38,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:48:38,324 INFO L225 Difference]: With dead ends: 4208 [2021-06-05 03:48:38,324 INFO L226 Difference]: Without dead ends: 4208 [2021-06-05 03:48:38,325 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 55.1ms TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:48:38,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4208 states. [2021-06-05 03:48:38,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4208 to 3506. [2021-06-05 03:48:38,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3506 states, 3505 states have (on average 2.8185449358059915) internal successors, (9879), 3505 states have internal predecessors, (9879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:38,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3506 states to 3506 states and 9879 transitions. [2021-06-05 03:48:38,383 INFO L78 Accepts]: Start accepts. Automaton has 3506 states and 9879 transitions. Word has length 26 [2021-06-05 03:48:38,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:48:38,383 INFO L482 AbstractCegarLoop]: Abstraction has 3506 states and 9879 transitions. [2021-06-05 03:48:38,383 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:38,383 INFO L276 IsEmpty]: Start isEmpty. Operand 3506 states and 9879 transitions. [2021-06-05 03:48:38,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 03:48:38,386 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:48:38,386 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:48:38,597 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:48:38,597 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:48:38,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:48:38,597 INFO L82 PathProgramCache]: Analyzing trace with hash 1258958503, now seen corresponding path program 27 times [2021-06-05 03:48:38,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:48:38,598 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955766749] [2021-06-05 03:48:38,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:48:38,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:48:38,627 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:48:38,628 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:48:38,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955766749] [2021-06-05 03:48:38,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955766749] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:48:38,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214961024] [2021-06-05 03:48:38,628 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:48:38,656 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 03:48:38,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:48:38,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 03:48:38,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:48:38,695 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:48:38,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214961024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:48:38,695 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:48:38,695 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-05 03:48:38,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711467051] [2021-06-05 03:48:38,695 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 03:48:38,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:48:38,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 03:48:38,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 03:48:38,696 INFO L87 Difference]: Start difference. First operand 3506 states and 9879 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:38,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:48:38,788 INFO L93 Difference]: Finished difference Result 3876 states and 10634 transitions. [2021-06-05 03:48:38,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 03:48:38,793 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 03:48:38,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:48:38,797 INFO L225 Difference]: With dead ends: 3876 [2021-06-05 03:48:38,797 INFO L226 Difference]: Without dead ends: 3864 [2021-06-05 03:48:38,797 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 42.3ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-06-05 03:48:38,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3864 states. [2021-06-05 03:48:38,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3864 to 3527. [2021-06-05 03:48:38,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3527 states, 3526 states have (on average 2.811401020986954) internal successors, (9913), 3526 states have internal predecessors, (9913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:38,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3527 states to 3527 states and 9913 transitions. [2021-06-05 03:48:38,839 INFO L78 Accepts]: Start accepts. Automaton has 3527 states and 9913 transitions. Word has length 26 [2021-06-05 03:48:38,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:48:38,839 INFO L482 AbstractCegarLoop]: Abstraction has 3527 states and 9913 transitions. [2021-06-05 03:48:38,839 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:38,839 INFO L276 IsEmpty]: Start isEmpty. Operand 3527 states and 9913 transitions. [2021-06-05 03:48:38,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 03:48:38,841 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:48:38,842 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:48:39,049 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-06-05 03:48:39,049 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:48:39,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:48:39,050 INFO L82 PathProgramCache]: Analyzing trace with hash -1264613717, now seen corresponding path program 28 times [2021-06-05 03:48:39,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:48:39,050 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539739221] [2021-06-05 03:48:39,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:48:39,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:48:39,082 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:48:39,082 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:48:39,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539739221] [2021-06-05 03:48:39,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539739221] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:48:39,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547020643] [2021-06-05 03:48:39,082 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:48:39,104 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:48:39,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:48:39,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 03:48:39,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:48:39,174 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:48:39,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547020643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:48:39,174 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:48:39,174 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-06-05 03:48:39,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883784908] [2021-06-05 03:48:39,175 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 03:48:39,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:48:39,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 03:48:39,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-06-05 03:48:39,175 INFO L87 Difference]: Start difference. First operand 3527 states and 9913 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:39,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:48:39,342 INFO L93 Difference]: Finished difference Result 4288 states and 11605 transitions. [2021-06-05 03:48:39,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 03:48:39,342 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 03:48:39,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:48:39,346 INFO L225 Difference]: With dead ends: 4288 [2021-06-05 03:48:39,346 INFO L226 Difference]: Without dead ends: 4288 [2021-06-05 03:48:39,346 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 90.8ms TimeCoverageRelationStatistics Valid=77, Invalid=105, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:48:39,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4288 states. [2021-06-05 03:48:39,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4288 to 3636. [2021-06-05 03:48:39,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3636 states, 3635 states have (on average 2.817881705639615) internal successors, (10243), 3635 states have internal predecessors, (10243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:39,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3636 states to 3636 states and 10243 transitions. [2021-06-05 03:48:39,386 INFO L78 Accepts]: Start accepts. Automaton has 3636 states and 10243 transitions. Word has length 26 [2021-06-05 03:48:39,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:48:39,386 INFO L482 AbstractCegarLoop]: Abstraction has 3636 states and 10243 transitions. [2021-06-05 03:48:39,386 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:39,386 INFO L276 IsEmpty]: Start isEmpty. Operand 3636 states and 10243 transitions. [2021-06-05 03:48:39,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 03:48:39,388 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:48:39,388 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:48:39,589 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-06-05 03:48:39,589 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:48:39,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:48:39,589 INFO L82 PathProgramCache]: Analyzing trace with hash -535116392, now seen corresponding path program 29 times [2021-06-05 03:48:39,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:48:39,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518899333] [2021-06-05 03:48:39,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:48:39,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:48:39,618 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:48:39,618 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:48:39,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518899333] [2021-06-05 03:48:39,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518899333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:48:39,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098675763] [2021-06-05 03:48:39,618 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:48:39,640 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 03:48:39,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:48:39,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 03:48:39,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:48:39,682 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:48:39,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098675763] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:48:39,682 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:48:39,682 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 8 [2021-06-05 03:48:39,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892755845] [2021-06-05 03:48:39,682 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 03:48:39,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:48:39,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 03:48:39,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-05 03:48:39,682 INFO L87 Difference]: Start difference. First operand 3636 states and 10243 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:39,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:48:39,812 INFO L93 Difference]: Finished difference Result 4890 states and 13623 transitions. [2021-06-05 03:48:39,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 03:48:39,812 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 03:48:39,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:48:39,816 INFO L225 Difference]: With dead ends: 4890 [2021-06-05 03:48:39,816 INFO L226 Difference]: Without dead ends: 4858 [2021-06-05 03:48:39,817 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 48.5ms TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:48:39,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4858 states. [2021-06-05 03:48:39,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4858 to 4449. [2021-06-05 03:48:39,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4449 states, 4448 states have (on average 2.8424010791366907) internal successors, (12643), 4448 states have internal predecessors, (12643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:39,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4449 states to 4449 states and 12643 transitions. [2021-06-05 03:48:39,863 INFO L78 Accepts]: Start accepts. Automaton has 4449 states and 12643 transitions. Word has length 26 [2021-06-05 03:48:39,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:48:39,863 INFO L482 AbstractCegarLoop]: Abstraction has 4449 states and 12643 transitions. [2021-06-05 03:48:39,863 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:39,863 INFO L276 IsEmpty]: Start isEmpty. Operand 4449 states and 12643 transitions. [2021-06-05 03:48:39,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 03:48:39,865 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:48:39,865 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:48:40,066 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:48:40,066 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:48:40,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:48:40,066 INFO L82 PathProgramCache]: Analyzing trace with hash -2036715645, now seen corresponding path program 30 times [2021-06-05 03:48:40,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:48:40,066 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171558725] [2021-06-05 03:48:40,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:48:40,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:48:40,093 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:48:40,093 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:48:40,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171558725] [2021-06-05 03:48:40,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171558725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:48:40,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90862157] [2021-06-05 03:48:40,093 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:48:40,115 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 03:48:40,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:48:40,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 03:48:40,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:48:40,159 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:48:40,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90862157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:48:40,160 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:48:40,160 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-05 03:48:40,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869818472] [2021-06-05 03:48:40,160 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 03:48:40,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:48:40,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 03:48:40,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 03:48:40,160 INFO L87 Difference]: Start difference. First operand 4449 states and 12643 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:40,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:48:40,245 INFO L93 Difference]: Finished difference Result 5697 states and 15817 transitions. [2021-06-05 03:48:40,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 03:48:40,246 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 03:48:40,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:48:40,251 INFO L225 Difference]: With dead ends: 5697 [2021-06-05 03:48:40,251 INFO L226 Difference]: Without dead ends: 5697 [2021-06-05 03:48:40,251 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 37.2ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-05 03:48:40,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5697 states. [2021-06-05 03:48:40,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5697 to 5030. [2021-06-05 03:48:40,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5030 states, 5029 states have (on average 2.8657784847882284) internal successors, (14412), 5029 states have internal predecessors, (14412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:40,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5030 states to 5030 states and 14412 transitions. [2021-06-05 03:48:40,302 INFO L78 Accepts]: Start accepts. Automaton has 5030 states and 14412 transitions. Word has length 26 [2021-06-05 03:48:40,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:48:40,302 INFO L482 AbstractCegarLoop]: Abstraction has 5030 states and 14412 transitions. [2021-06-05 03:48:40,302 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:40,302 INFO L276 IsEmpty]: Start isEmpty. Operand 5030 states and 14412 transitions. [2021-06-05 03:48:40,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 03:48:40,304 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:48:40,304 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:48:40,505 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:48:40,505 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:48:40,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:48:40,505 INFO L82 PathProgramCache]: Analyzing trace with hash 1680875446, now seen corresponding path program 31 times [2021-06-05 03:48:40,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:48:40,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009681106] [2021-06-05 03:48:40,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:48:40,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:48:40,541 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:48:40,541 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:48:40,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009681106] [2021-06-05 03:48:40,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009681106] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:48:40,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848961787] [2021-06-05 03:48:40,541 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:48:40,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:48:40,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 03:48:40,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:48:40,596 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:48:40,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848961787] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:48:40,596 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:48:40,596 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 6 [2021-06-05 03:48:40,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299563770] [2021-06-05 03:48:40,596 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 03:48:40,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:48:40,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 03:48:40,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 03:48:40,597 INFO L87 Difference]: Start difference. First operand 5030 states and 14412 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:40,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:48:40,694 INFO L93 Difference]: Finished difference Result 6176 states and 17476 transitions. [2021-06-05 03:48:40,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 03:48:40,694 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 03:48:40,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:48:40,700 INFO L225 Difference]: With dead ends: 6176 [2021-06-05 03:48:40,700 INFO L226 Difference]: Without dead ends: 6160 [2021-06-05 03:48:40,701 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 40.1ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-06-05 03:48:40,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6160 states. [2021-06-05 03:48:40,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6160 to 5779. [2021-06-05 03:48:40,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5779 states, 5778 states have (on average 2.8816199376947043) internal successors, (16650), 5778 states have internal predecessors, (16650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:40,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5779 states to 5779 states and 16650 transitions. [2021-06-05 03:48:40,778 INFO L78 Accepts]: Start accepts. Automaton has 5779 states and 16650 transitions. Word has length 26 [2021-06-05 03:48:40,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:48:40,778 INFO L482 AbstractCegarLoop]: Abstraction has 5779 states and 16650 transitions. [2021-06-05 03:48:40,778 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:40,778 INFO L276 IsEmpty]: Start isEmpty. Operand 5779 states and 16650 transitions. [2021-06-05 03:48:40,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 03:48:40,781 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:48:40,781 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:48:40,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:48:40,989 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:48:40,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:48:40,989 INFO L82 PathProgramCache]: Analyzing trace with hash 1058995036, now seen corresponding path program 32 times [2021-06-05 03:48:40,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:48:40,990 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756834785] [2021-06-05 03:48:40,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:48:40,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:48:41,014 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:48:41,014 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:48:41,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756834785] [2021-06-05 03:48:41,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756834785] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:48:41,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705922412] [2021-06-05 03:48:41,014 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:48:41,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:48:41,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:48:41,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 03:48:41,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:48:41,072 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:48:41,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705922412] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:48:41,072 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:48:41,073 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 6 [2021-06-05 03:48:41,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530976722] [2021-06-05 03:48:41,073 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 03:48:41,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:48:41,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 03:48:41,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 03:48:41,073 INFO L87 Difference]: Start difference. First operand 5779 states and 16650 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:41,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:48:41,176 INFO L93 Difference]: Finished difference Result 6311 states and 17791 transitions. [2021-06-05 03:48:41,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 03:48:41,177 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 03:48:41,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:48:41,183 INFO L225 Difference]: With dead ends: 6311 [2021-06-05 03:48:41,183 INFO L226 Difference]: Without dead ends: 6311 [2021-06-05 03:48:41,183 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 40.2ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-06-05 03:48:41,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6311 states. [2021-06-05 03:48:41,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6311 to 5796. [2021-06-05 03:48:41,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5796 states, 5795 states have (on average 2.8807592752372737) internal successors, (16694), 5795 states have internal predecessors, (16694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:41,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5796 states to 5796 states and 16694 transitions. [2021-06-05 03:48:41,243 INFO L78 Accepts]: Start accepts. Automaton has 5796 states and 16694 transitions. Word has length 26 [2021-06-05 03:48:41,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:48:41,243 INFO L482 AbstractCegarLoop]: Abstraction has 5796 states and 16694 transitions. [2021-06-05 03:48:41,243 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:41,243 INFO L276 IsEmpty]: Start isEmpty. Operand 5796 states and 16694 transitions. [2021-06-05 03:48:41,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 03:48:41,246 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:48:41,246 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:48:41,446 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-06-05 03:48:41,446 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:48:41,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:48:41,446 INFO L82 PathProgramCache]: Analyzing trace with hash 127178589, now seen corresponding path program 33 times [2021-06-05 03:48:41,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:48:41,446 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125465062] [2021-06-05 03:48:41,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:48:41,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:48:41,470 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:48:41,470 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:48:41,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125465062] [2021-06-05 03:48:41,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125465062] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:48:41,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261243869] [2021-06-05 03:48:41,470 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:48:41,493 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 03:48:41,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:48:41,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 03:48:41,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:48:41,527 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:48:41,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261243869] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:48:41,527 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:48:41,527 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-05 03:48:41,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854465176] [2021-06-05 03:48:41,527 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 03:48:41,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:48:41,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 03:48:41,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 03:48:41,527 INFO L87 Difference]: Start difference. First operand 5796 states and 16694 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:41,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:48:41,590 INFO L93 Difference]: Finished difference Result 6492 states and 18169 transitions. [2021-06-05 03:48:41,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 03:48:41,590 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 03:48:41,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:48:41,598 INFO L225 Difference]: With dead ends: 6492 [2021-06-05 03:48:41,598 INFO L226 Difference]: Without dead ends: 6489 [2021-06-05 03:48:41,598 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 20.9ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 03:48:41,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6489 states. [2021-06-05 03:48:41,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6489 to 5795. [2021-06-05 03:48:41,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5795 states, 5794 states have (on average 2.8795305488436314) internal successors, (16684), 5794 states have internal predecessors, (16684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:41,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5795 states to 5795 states and 16684 transitions. [2021-06-05 03:48:41,696 INFO L78 Accepts]: Start accepts. Automaton has 5795 states and 16684 transitions. Word has length 26 [2021-06-05 03:48:41,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:48:41,696 INFO L482 AbstractCegarLoop]: Abstraction has 5795 states and 16684 transitions. [2021-06-05 03:48:41,696 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:41,696 INFO L276 IsEmpty]: Start isEmpty. Operand 5795 states and 16684 transitions. [2021-06-05 03:48:41,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 03:48:41,698 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:48:41,698 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:48:41,900 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:48:41,901 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:48:41,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:48:41,901 INFO L82 PathProgramCache]: Analyzing trace with hash -578577420, now seen corresponding path program 34 times [2021-06-05 03:48:41,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:48:41,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274584314] [2021-06-05 03:48:41,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:48:41,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:48:41,930 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:48:41,930 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:48:41,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274584314] [2021-06-05 03:48:41,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274584314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:48:41,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928710084] [2021-06-05 03:48:41,930 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 03:48:41,965 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:48:41,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:48:41,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 03:48:41,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:48:42,001 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:48:42,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928710084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:48:42,002 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:48:42,002 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 7 [2021-06-05 03:48:42,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565363735] [2021-06-05 03:48:42,002 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 03:48:42,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:48:42,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 03:48:42,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-06-05 03:48:42,002 INFO L87 Difference]: Start difference. First operand 5795 states and 16684 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:42,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:48:42,136 INFO L93 Difference]: Finished difference Result 6497 states and 18243 transitions. [2021-06-05 03:48:42,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 03:48:42,137 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 03:48:42,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:48:42,143 INFO L225 Difference]: With dead ends: 6497 [2021-06-05 03:48:42,143 INFO L226 Difference]: Without dead ends: 6497 [2021-06-05 03:48:42,143 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 58.9ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:48:42,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6497 states. [2021-06-05 03:48:42,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6497 to 5692. [2021-06-05 03:48:42,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5692 states, 5691 states have (on average 2.870848708487085) internal successors, (16338), 5691 states have internal predecessors, (16338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:42,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5692 states to 5692 states and 16338 transitions. [2021-06-05 03:48:42,202 INFO L78 Accepts]: Start accepts. Automaton has 5692 states and 16338 transitions. Word has length 26 [2021-06-05 03:48:42,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:48:42,202 INFO L482 AbstractCegarLoop]: Abstraction has 5692 states and 16338 transitions. [2021-06-05 03:48:42,203 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:42,203 INFO L276 IsEmpty]: Start isEmpty. Operand 5692 states and 16338 transitions. [2021-06-05 03:48:42,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 03:48:42,205 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:48:42,205 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:48:42,405 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:48:42,406 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:48:42,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:48:42,406 INFO L82 PathProgramCache]: Analyzing trace with hash 334241155, now seen corresponding path program 35 times [2021-06-05 03:48:42,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:48:42,406 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795559203] [2021-06-05 03:48:42,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:48:42,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:48:42,434 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:48:42,435 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:48:42,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795559203] [2021-06-05 03:48:42,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795559203] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:48:42,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758603830] [2021-06-05 03:48:42,435 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:48:42,458 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 03:48:42,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:48:42,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 03:48:42,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:48:42,502 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:48:42,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758603830] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:48:42,502 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:48:42,502 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 8 [2021-06-05 03:48:42,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083172606] [2021-06-05 03:48:42,502 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 03:48:42,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:48:42,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 03:48:42,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-05 03:48:42,503 INFO L87 Difference]: Start difference. First operand 5692 states and 16338 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:42,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:48:42,608 INFO L93 Difference]: Finished difference Result 8010 states and 22671 transitions. [2021-06-05 03:48:42,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 03:48:42,608 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 03:48:42,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:48:42,618 INFO L225 Difference]: With dead ends: 8010 [2021-06-05 03:48:42,618 INFO L226 Difference]: Without dead ends: 7995 [2021-06-05 03:48:42,618 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 43.3ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 03:48:42,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7995 states. [2021-06-05 03:48:42,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7995 to 7490. [2021-06-05 03:48:42,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7490 states, 7489 states have (on average 2.8919748965148884) internal successors, (21658), 7489 states have internal predecessors, (21658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:42,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7490 states to 7490 states and 21658 transitions. [2021-06-05 03:48:42,729 INFO L78 Accepts]: Start accepts. Automaton has 7490 states and 21658 transitions. Word has length 26 [2021-06-05 03:48:42,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:48:42,729 INFO L482 AbstractCegarLoop]: Abstraction has 7490 states and 21658 transitions. [2021-06-05 03:48:42,729 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:42,729 INFO L276 IsEmpty]: Start isEmpty. Operand 7490 states and 21658 transitions. [2021-06-05 03:48:42,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 03:48:42,733 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:48:42,733 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:48:42,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable82 [2021-06-05 03:48:42,940 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:48:42,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:48:42,940 INFO L82 PathProgramCache]: Analyzing trace with hash -232684456, now seen corresponding path program 36 times [2021-06-05 03:48:42,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:48:42,940 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129703108] [2021-06-05 03:48:42,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:48:42,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:48:42,978 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:48:42,978 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:48:42,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129703108] [2021-06-05 03:48:42,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129703108] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:48:42,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116621980] [2021-06-05 03:48:42,978 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:48:43,009 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 03:48:43,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:48:43,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 03:48:43,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:48:43,065 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:48:43,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116621980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:48:43,065 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:48:43,065 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2021-06-05 03:48:43,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630618169] [2021-06-05 03:48:43,066 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 03:48:43,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:48:43,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 03:48:43,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:48:43,067 INFO L87 Difference]: Start difference. First operand 7490 states and 21658 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:43,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:48:43,301 INFO L93 Difference]: Finished difference Result 8305 states and 23489 transitions. [2021-06-05 03:48:43,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 03:48:43,302 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 03:48:43,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:48:43,310 INFO L225 Difference]: With dead ends: 8305 [2021-06-05 03:48:43,310 INFO L226 Difference]: Without dead ends: 8305 [2021-06-05 03:48:43,311 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 114.3ms TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:48:43,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8305 states. [2021-06-05 03:48:43,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8305 to 5349. [2021-06-05 03:48:43,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5349 states, 5348 states have (on average 2.863874345549738) internal successors, (15316), 5348 states have internal predecessors, (15316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:43,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5349 states to 5349 states and 15316 transitions. [2021-06-05 03:48:43,387 INFO L78 Accepts]: Start accepts. Automaton has 5349 states and 15316 transitions. Word has length 26 [2021-06-05 03:48:43,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:48:43,387 INFO L482 AbstractCegarLoop]: Abstraction has 5349 states and 15316 transitions. [2021-06-05 03:48:43,387 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:43,387 INFO L276 IsEmpty]: Start isEmpty. Operand 5349 states and 15316 transitions. [2021-06-05 03:48:43,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 03:48:43,390 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:48:43,391 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:48:43,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:48:43,593 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:48:43,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:48:43,593 INFO L82 PathProgramCache]: Analyzing trace with hash 1947181405, now seen corresponding path program 37 times [2021-06-05 03:48:43,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:48:43,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313092338] [2021-06-05 03:48:43,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:48:43,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:48:43,632 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:48:43,633 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:48:43,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313092338] [2021-06-05 03:48:43,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313092338] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:48:43,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711230230] [2021-06-05 03:48:43,633 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:48:43,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:48:43,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 03:48:43,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:48:43,720 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:48:43,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711230230] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:48:43,721 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:48:43,721 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 03:48:43,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775231098] [2021-06-05 03:48:43,721 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 03:48:43,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:48:43,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 03:48:43,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-06-05 03:48:43,721 INFO L87 Difference]: Start difference. First operand 5349 states and 15316 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:43,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:48:43,820 INFO L93 Difference]: Finished difference Result 5938 states and 16533 transitions. [2021-06-05 03:48:43,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 03:48:43,820 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 03:48:43,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:48:43,826 INFO L225 Difference]: With dead ends: 5938 [2021-06-05 03:48:43,826 INFO L226 Difference]: Without dead ends: 5915 [2021-06-05 03:48:43,826 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 48.8ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-05 03:48:43,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5915 states. [2021-06-05 03:48:43,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5915 to 5382. [2021-06-05 03:48:43,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5382 states, 5381 states have (on average 2.858018955584464) internal successors, (15379), 5381 states have internal predecessors, (15379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:43,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5382 states to 5382 states and 15379 transitions. [2021-06-05 03:48:43,907 INFO L78 Accepts]: Start accepts. Automaton has 5382 states and 15379 transitions. Word has length 26 [2021-06-05 03:48:43,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:48:43,907 INFO L482 AbstractCegarLoop]: Abstraction has 5382 states and 15379 transitions. [2021-06-05 03:48:43,907 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:43,907 INFO L276 IsEmpty]: Start isEmpty. Operand 5382 states and 15379 transitions. [2021-06-05 03:48:43,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 03:48:43,911 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:48:43,911 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:48:44,111 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2021-06-05 03:48:44,111 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:48:44,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:48:44,111 INFO L82 PathProgramCache]: Analyzing trace with hash -1692037720, now seen corresponding path program 5 times [2021-06-05 03:48:44,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:48:44,112 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845352746] [2021-06-05 03:48:44,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:48:44,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:48:44,156 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:48:44,156 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:48:44,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845352746] [2021-06-05 03:48:44,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845352746] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:48:44,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724340990] [2021-06-05 03:48:44,156 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 03:48:44,185 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 03:48:44,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:48:44,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 03:48:44,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:48:44,254 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:48:44,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724340990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:48:44,254 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:48:44,254 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 03:48:44,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686297641] [2021-06-05 03:48:44,255 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 03:48:44,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:48:44,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 03:48:44,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-06-05 03:48:44,255 INFO L87 Difference]: Start difference. First operand 5382 states and 15379 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:44,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:48:44,450 INFO L93 Difference]: Finished difference Result 5894 states and 16303 transitions. [2021-06-05 03:48:44,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 03:48:44,450 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 03:48:44,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:48:44,456 INFO L225 Difference]: With dead ends: 5894 [2021-06-05 03:48:44,456 INFO L226 Difference]: Without dead ends: 5890 [2021-06-05 03:48:44,457 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 106.2ms TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:48:44,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5890 states. [2021-06-05 03:48:44,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5890 to 5478. [2021-06-05 03:48:44,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5478 states, 5477 states have (on average 2.823808654372832) internal successors, (15466), 5477 states have internal predecessors, (15466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:44,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5478 states to 5478 states and 15466 transitions. [2021-06-05 03:48:44,516 INFO L78 Accepts]: Start accepts. Automaton has 5478 states and 15466 transitions. Word has length 29 [2021-06-05 03:48:44,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:48:44,516 INFO L482 AbstractCegarLoop]: Abstraction has 5478 states and 15466 transitions. [2021-06-05 03:48:44,517 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:44,517 INFO L276 IsEmpty]: Start isEmpty. Operand 5478 states and 15466 transitions. [2021-06-05 03:48:44,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 03:48:44,520 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:48:44,520 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:48:44,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:48:44,721 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:48:44,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:48:44,721 INFO L82 PathProgramCache]: Analyzing trace with hash 2081641864, now seen corresponding path program 38 times [2021-06-05 03:48:44,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:48:44,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875874194] [2021-06-05 03:48:44,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:48:44,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:48:44,755 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:48:44,755 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:48:44,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875874194] [2021-06-05 03:48:44,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875874194] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:48:44,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948992195] [2021-06-05 03:48:44,755 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:48:44,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:48:44,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:48:44,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 03:48:44,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:48:44,816 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:48:44,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948992195] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:48:44,816 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:48:44,816 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-05 03:48:44,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058723822] [2021-06-05 03:48:44,816 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 03:48:44,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:48:44,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 03:48:44,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-05 03:48:44,817 INFO L87 Difference]: Start difference. First operand 5478 states and 15466 transitions. Second operand has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:44,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:48:44,912 INFO L93 Difference]: Finished difference Result 6571 states and 18236 transitions. [2021-06-05 03:48:44,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 03:48:44,912 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 03:48:44,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:48:44,919 INFO L225 Difference]: With dead ends: 6571 [2021-06-05 03:48:44,919 INFO L226 Difference]: Without dead ends: 6564 [2021-06-05 03:48:44,919 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.6ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-05 03:48:44,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6564 states. [2021-06-05 03:48:44,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6564 to 6354. [2021-06-05 03:48:44,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6354 states, 6353 states have (on average 2.808279552967102) internal successors, (17841), 6353 states have internal predecessors, (17841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:45,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6354 states to 6354 states and 17841 transitions. [2021-06-05 03:48:45,004 INFO L78 Accepts]: Start accepts. Automaton has 6354 states and 17841 transitions. Word has length 29 [2021-06-05 03:48:45,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:48:45,004 INFO L482 AbstractCegarLoop]: Abstraction has 6354 states and 17841 transitions. [2021-06-05 03:48:45,004 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:45,004 INFO L276 IsEmpty]: Start isEmpty. Operand 6354 states and 17841 transitions. [2021-06-05 03:48:45,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 03:48:45,008 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:48:45,008 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:48:45,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:48:45,208 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:48:45,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:48:45,209 INFO L82 PathProgramCache]: Analyzing trace with hash -159779870, now seen corresponding path program 39 times [2021-06-05 03:48:45,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:48:45,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470471278] [2021-06-05 03:48:45,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:48:45,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:48:45,239 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 03:48:45,239 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:48:45,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470471278] [2021-06-05 03:48:45,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470471278] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:48:45,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247483651] [2021-06-05 03:48:45,239 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:48:45,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 03:48:45,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:48:45,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 03:48:45,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:48:45,385 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 03:48:45,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247483651] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:48:45,386 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:48:45,386 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9] total 12 [2021-06-05 03:48:45,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132072915] [2021-06-05 03:48:45,386 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 03:48:45,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:48:45,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 03:48:45,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:48:45,386 INFO L87 Difference]: Start difference. First operand 6354 states and 17841 transitions. Second operand has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:46,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:48:46,058 INFO L93 Difference]: Finished difference Result 14438 states and 39075 transitions. [2021-06-05 03:48:46,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 03:48:46,058 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 03:48:46,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:48:46,074 INFO L225 Difference]: With dead ends: 14438 [2021-06-05 03:48:46,075 INFO L226 Difference]: Without dead ends: 14355 [2021-06-05 03:48:46,075 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 366.1ms TimeCoverageRelationStatistics Valid=181, Invalid=749, Unknown=0, NotChecked=0, Total=930 [2021-06-05 03:48:46,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14355 states. [2021-06-05 03:48:46,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14355 to 8796. [2021-06-05 03:48:46,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8796 states, 8795 states have (on average 2.8627629334849347) internal successors, (25178), 8795 states have internal predecessors, (25178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:46,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8796 states to 8796 states and 25178 transitions. [2021-06-05 03:48:46,243 INFO L78 Accepts]: Start accepts. Automaton has 8796 states and 25178 transitions. Word has length 29 [2021-06-05 03:48:46,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:48:46,243 INFO L482 AbstractCegarLoop]: Abstraction has 8796 states and 25178 transitions. [2021-06-05 03:48:46,243 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:46,243 INFO L276 IsEmpty]: Start isEmpty. Operand 8796 states and 25178 transitions. [2021-06-05 03:48:46,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 03:48:46,248 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:48:46,248 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:48:46,448 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:48:46,448 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:48:46,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:48:46,449 INFO L82 PathProgramCache]: Analyzing trace with hash 328852904, now seen corresponding path program 6 times [2021-06-05 03:48:46,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:48:46,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455897083] [2021-06-05 03:48:46,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:48:46,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:48:46,502 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:48:46,502 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:48:46,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455897083] [2021-06-05 03:48:46,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455897083] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:48:46,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519645141] [2021-06-05 03:48:46,502 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:48:46,526 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 03:48:46,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:48:46,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 03:48:46,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:48:46,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 03:48:46,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 03:48:46,644 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 03:48:46,645 INFO L628 ElimStorePlain]: treesize reduction 14, result has 6.7 percent of original size [2021-06-05 03:48:46,645 INFO L518 ElimStorePlain]: Eliminatee B vanished before elimination [2021-06-05 03:48:46,646 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 03:48:46,646 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:22, output treesize:1 [2021-06-05 03:48:46,651 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:48:46,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519645141] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:48:46,651 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:48:46,651 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 03:48:46,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48364779] [2021-06-05 03:48:46,652 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 03:48:46,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:48:46,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 03:48:46,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 03:48:46,652 INFO L87 Difference]: Start difference. First operand 8796 states and 25178 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:46,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:48:46,866 INFO L93 Difference]: Finished difference Result 6002 states and 16256 transitions. [2021-06-05 03:48:46,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 03:48:46,866 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 03:48:46,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:48:46,873 INFO L225 Difference]: With dead ends: 6002 [2021-06-05 03:48:46,873 INFO L226 Difference]: Without dead ends: 5857 [2021-06-05 03:48:46,873 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 68.7ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 03:48:46,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5857 states. [2021-06-05 03:48:46,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5857 to 3330. [2021-06-05 03:48:46,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3330 states, 3329 states have (on average 2.7981375788525082) internal successors, (9315), 3329 states have internal predecessors, (9315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:46,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3330 states to 3330 states and 9315 transitions. [2021-06-05 03:48:46,919 INFO L78 Accepts]: Start accepts. Automaton has 3330 states and 9315 transitions. Word has length 29 [2021-06-05 03:48:46,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:48:46,919 INFO L482 AbstractCegarLoop]: Abstraction has 3330 states and 9315 transitions. [2021-06-05 03:48:46,919 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:46,919 INFO L276 IsEmpty]: Start isEmpty. Operand 3330 states and 9315 transitions. [2021-06-05 03:48:46,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 03:48:46,921 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:48:46,921 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:48:47,136 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:48:47,136 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:48:47,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:48:47,137 INFO L82 PathProgramCache]: Analyzing trace with hash -114875864, now seen corresponding path program 7 times [2021-06-05 03:48:47,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:48:47,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636074552] [2021-06-05 03:48:47,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:48:47,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:48:47,182 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:48:47,182 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:48:47,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636074552] [2021-06-05 03:48:47,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636074552] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:48:47,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358795006] [2021-06-05 03:48:47,182 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:48:47,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:48:47,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 03:48:47,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:48:47,243 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:48:47,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358795006] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:48:47,244 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:48:47,244 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 03:48:47,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763307040] [2021-06-05 03:48:47,244 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 03:48:47,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:48:47,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 03:48:47,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 03:48:47,245 INFO L87 Difference]: Start difference. First operand 3330 states and 9315 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:47,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:48:47,349 INFO L93 Difference]: Finished difference Result 3434 states and 9538 transitions. [2021-06-05 03:48:47,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 03:48:47,349 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 03:48:47,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:48:47,352 INFO L225 Difference]: With dead ends: 3434 [2021-06-05 03:48:47,352 INFO L226 Difference]: Without dead ends: 3434 [2021-06-05 03:48:47,352 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 47.3ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-05 03:48:47,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3434 states. [2021-06-05 03:48:47,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3434 to 3356. [2021-06-05 03:48:47,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3356 states, 3355 states have (on average 2.794634873323398) internal successors, (9376), 3355 states have internal predecessors, (9376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:47,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3356 states to 3356 states and 9376 transitions. [2021-06-05 03:48:47,381 INFO L78 Accepts]: Start accepts. Automaton has 3356 states and 9376 transitions. Word has length 29 [2021-06-05 03:48:47,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:48:47,382 INFO L482 AbstractCegarLoop]: Abstraction has 3356 states and 9376 transitions. [2021-06-05 03:48:47,382 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:47,382 INFO L276 IsEmpty]: Start isEmpty. Operand 3356 states and 9376 transitions. [2021-06-05 03:48:47,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 03:48:47,383 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:48:47,384 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:48:47,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-06-05 03:48:47,584 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:48:47,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:48:47,584 INFO L82 PathProgramCache]: Analyzing trace with hash 1336556998, now seen corresponding path program 6 times [2021-06-05 03:48:47,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:48:47,584 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54238017] [2021-06-05 03:48:47,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:48:47,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:48:47,629 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:48:47,630 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:48:47,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54238017] [2021-06-05 03:48:47,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54238017] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:48:47,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483663526] [2021-06-05 03:48:47,630 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:48:47,652 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 03:48:47,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:48:47,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 03:48:47,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:48:47,702 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:48:47,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483663526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:48:47,703 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:48:47,703 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 03:48:47,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920231701] [2021-06-05 03:48:47,703 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 03:48:47,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:48:47,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 03:48:47,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 03:48:47,703 INFO L87 Difference]: Start difference. First operand 3356 states and 9376 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:47,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:48:47,813 INFO L93 Difference]: Finished difference Result 3792 states and 10255 transitions. [2021-06-05 03:48:47,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 03:48:47,813 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 03:48:47,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:48:47,817 INFO L225 Difference]: With dead ends: 3792 [2021-06-05 03:48:47,817 INFO L226 Difference]: Without dead ends: 3777 [2021-06-05 03:48:47,817 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 46.7ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-05 03:48:47,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3777 states. [2021-06-05 03:48:47,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3777 to 3443. [2021-06-05 03:48:47,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3443 states, 3442 states have (on average 2.779779198140616) internal successors, (9568), 3442 states have internal predecessors, (9568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:47,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3443 states to 3443 states and 9568 transitions. [2021-06-05 03:48:47,856 INFO L78 Accepts]: Start accepts. Automaton has 3443 states and 9568 transitions. Word has length 29 [2021-06-05 03:48:47,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:48:47,856 INFO L482 AbstractCegarLoop]: Abstraction has 3443 states and 9568 transitions. [2021-06-05 03:48:47,856 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:47,856 INFO L276 IsEmpty]: Start isEmpty. Operand 3443 states and 9568 transitions. [2021-06-05 03:48:47,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 03:48:47,858 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:48:47,858 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:48:48,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-06-05 03:48:48,069 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:48:48,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:48:48,069 INFO L82 PathProgramCache]: Analyzing trace with hash -1458077306, now seen corresponding path program 8 times [2021-06-05 03:48:48,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:48:48,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248207335] [2021-06-05 03:48:48,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:48:48,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:48:48,124 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:48:48,125 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:48:48,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248207335] [2021-06-05 03:48:48,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248207335] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:48:48,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137732130] [2021-06-05 03:48:48,125 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:48:48,148 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:48:48,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:48:48,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 03:48:48,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:48:48,212 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:48:48,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137732130] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:48:48,212 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:48:48,212 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-05 03:48:48,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827181939] [2021-06-05 03:48:48,213 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 03:48:48,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:48:48,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 03:48:48,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 03:48:48,214 INFO L87 Difference]: Start difference. First operand 3443 states and 9568 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:48,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:48:48,367 INFO L93 Difference]: Finished difference Result 3707 states and 10003 transitions. [2021-06-05 03:48:48,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 03:48:48,367 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 03:48:48,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:48:48,371 INFO L225 Difference]: With dead ends: 3707 [2021-06-05 03:48:48,371 INFO L226 Difference]: Without dead ends: 3623 [2021-06-05 03:48:48,372 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 50.4ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-05 03:48:48,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3623 states. [2021-06-05 03:48:48,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3623 to 3361. [2021-06-05 03:48:48,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3361 states, 3360 states have (on average 2.7607142857142857) internal successors, (9276), 3360 states have internal predecessors, (9276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:48,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3361 states to 3361 states and 9276 transitions. [2021-06-05 03:48:48,411 INFO L78 Accepts]: Start accepts. Automaton has 3361 states and 9276 transitions. Word has length 29 [2021-06-05 03:48:48,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:48:48,411 INFO L482 AbstractCegarLoop]: Abstraction has 3361 states and 9276 transitions. [2021-06-05 03:48:48,411 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:48,411 INFO L276 IsEmpty]: Start isEmpty. Operand 3361 states and 9276 transitions. [2021-06-05 03:48:48,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 03:48:48,413 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:48:48,413 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:48:48,629 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-06-05 03:48:48,629 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:48:48,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:48:48,629 INFO L82 PathProgramCache]: Analyzing trace with hash -2071613486, now seen corresponding path program 9 times [2021-06-05 03:48:48,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:48:48,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779229041] [2021-06-05 03:48:48,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:48:48,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:48:48,669 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 03:48:48,670 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:48:48,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779229041] [2021-06-05 03:48:48,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779229041] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:48:48,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102131802] [2021-06-05 03:48:48,670 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:48:48,705 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 03:48:48,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:48:48,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 03:48:48,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:48:48,743 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 03:48:48,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102131802] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:48:48,743 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:48:48,743 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 03:48:48,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312059542] [2021-06-05 03:48:48,744 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 03:48:48,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:48:48,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 03:48:48,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 03:48:48,744 INFO L87 Difference]: Start difference. First operand 3361 states and 9276 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:48,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:48:48,838 INFO L93 Difference]: Finished difference Result 3919 states and 10560 transitions. [2021-06-05 03:48:48,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 03:48:48,838 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 03:48:48,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:48:48,842 INFO L225 Difference]: With dead ends: 3919 [2021-06-05 03:48:48,842 INFO L226 Difference]: Without dead ends: 3907 [2021-06-05 03:48:48,842 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 42.9ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-05 03:48:48,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3907 states. [2021-06-05 03:48:48,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3907 to 3641. [2021-06-05 03:48:48,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3641 states, 3640 states have (on average 2.745879120879121) internal successors, (9995), 3640 states have internal predecessors, (9995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:48,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3641 states to 3641 states and 9995 transitions. [2021-06-05 03:48:48,893 INFO L78 Accepts]: Start accepts. Automaton has 3641 states and 9995 transitions. Word has length 29 [2021-06-05 03:48:48,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:48:48,893 INFO L482 AbstractCegarLoop]: Abstraction has 3641 states and 9995 transitions. [2021-06-05 03:48:48,893 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:48,893 INFO L276 IsEmpty]: Start isEmpty. Operand 3641 states and 9995 transitions. [2021-06-05 03:48:48,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 03:48:48,895 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:48:48,895 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:48:49,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-06-05 03:48:49,101 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:48:49,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:48:49,101 INFO L82 PathProgramCache]: Analyzing trace with hash 1048811592, now seen corresponding path program 40 times [2021-06-05 03:48:49,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:48:49,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767491521] [2021-06-05 03:48:49,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:48:49,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:48:49,132 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 03:48:49,132 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:48:49,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767491521] [2021-06-05 03:48:49,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767491521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:48:49,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196461169] [2021-06-05 03:48:49,132 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:48:49,157 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:48:49,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:48:49,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 03:48:49,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:48:49,192 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 03:48:49,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196461169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:48:49,192 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:48:49,192 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-05 03:48:49,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137345524] [2021-06-05 03:48:49,192 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 03:48:49,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:48:49,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 03:48:49,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-05 03:48:49,193 INFO L87 Difference]: Start difference. First operand 3641 states and 9995 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:49,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:48:49,282 INFO L93 Difference]: Finished difference Result 4879 states and 13397 transitions. [2021-06-05 03:48:49,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 03:48:49,283 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 03:48:49,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:48:49,288 INFO L225 Difference]: With dead ends: 4879 [2021-06-05 03:48:49,288 INFO L226 Difference]: Without dead ends: 4866 [2021-06-05 03:48:49,288 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.3ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-05 03:48:49,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4866 states. [2021-06-05 03:48:49,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4866 to 4554. [2021-06-05 03:48:49,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4554 states, 4553 states have (on average 2.7981550625960905) internal successors, (12740), 4553 states have internal predecessors, (12740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:49,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4554 states to 4554 states and 12740 transitions. [2021-06-05 03:48:49,343 INFO L78 Accepts]: Start accepts. Automaton has 4554 states and 12740 transitions. Word has length 29 [2021-06-05 03:48:49,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:48:49,343 INFO L482 AbstractCegarLoop]: Abstraction has 4554 states and 12740 transitions. [2021-06-05 03:48:49,344 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:49,344 INFO L276 IsEmpty]: Start isEmpty. Operand 4554 states and 12740 transitions. [2021-06-05 03:48:49,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 03:48:49,346 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:48:49,346 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:48:49,562 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-06-05 03:48:49,562 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:48:49,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:48:49,562 INFO L82 PathProgramCache]: Analyzing trace with hash 70303848, now seen corresponding path program 10 times [2021-06-05 03:48:49,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:48:49,562 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871006613] [2021-06-05 03:48:49,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:48:49,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:48:49,599 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:48:49,600 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:48:49,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871006613] [2021-06-05 03:48:49,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871006613] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:48:49,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952830823] [2021-06-05 03:48:49,600 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:48:49,621 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:48:49,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:48:49,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 03:48:49,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:48:49,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 03:48:49,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2021-06-05 03:48:49,685 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 03:48:49,687 INFO L628 ElimStorePlain]: treesize reduction 20, result has 4.8 percent of original size [2021-06-05 03:48:49,687 INFO L518 ElimStorePlain]: Eliminatee B vanished before elimination [2021-06-05 03:48:49,687 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 03:48:49,687 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:1 [2021-06-05 03:48:49,693 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:48:49,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952830823] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:48:49,693 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:48:49,693 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 03:48:49,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719341782] [2021-06-05 03:48:49,693 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 03:48:49,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:48:49,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 03:48:49,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-05 03:48:49,694 INFO L87 Difference]: Start difference. First operand 4554 states and 12740 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:49,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:48:49,916 INFO L93 Difference]: Finished difference Result 7716 states and 21017 transitions. [2021-06-05 03:48:49,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 03:48:49,917 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 03:48:49,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:48:49,924 INFO L225 Difference]: With dead ends: 7716 [2021-06-05 03:48:49,924 INFO L226 Difference]: Without dead ends: 7689 [2021-06-05 03:48:49,924 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 75.5ms TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:48:49,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7689 states. [2021-06-05 03:48:49,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7689 to 6612. [2021-06-05 03:48:49,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6612 states, 6611 states have (on average 2.8100136136741796) internal successors, (18577), 6611 states have internal predecessors, (18577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:50,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6612 states to 6612 states and 18577 transitions. [2021-06-05 03:48:50,005 INFO L78 Accepts]: Start accepts. Automaton has 6612 states and 18577 transitions. Word has length 29 [2021-06-05 03:48:50,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:48:50,005 INFO L482 AbstractCegarLoop]: Abstraction has 6612 states and 18577 transitions. [2021-06-05 03:48:50,005 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:50,005 INFO L276 IsEmpty]: Start isEmpty. Operand 6612 states and 18577 transitions. [2021-06-05 03:48:50,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 03:48:50,008 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:48:50,008 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:48:50,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-06-05 03:48:50,221 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:48:50,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:48:50,221 INFO L82 PathProgramCache]: Analyzing trace with hash -1154021054, now seen corresponding path program 7 times [2021-06-05 03:48:50,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:48:50,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623933266] [2021-06-05 03:48:50,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:48:50,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:48:50,254 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:48:50,254 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:48:50,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623933266] [2021-06-05 03:48:50,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623933266] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:48:50,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930083028] [2021-06-05 03:48:50,254 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 03:48:50,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:48:50,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 03:48:50,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:48:50,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 03:48:50,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2021-06-05 03:48:50,332 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 03:48:50,333 INFO L628 ElimStorePlain]: treesize reduction 20, result has 4.8 percent of original size [2021-06-05 03:48:50,333 INFO L518 ElimStorePlain]: Eliminatee B vanished before elimination [2021-06-05 03:48:50,334 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 03:48:50,334 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:1 [2021-06-05 03:48:50,338 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:48:50,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930083028] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:48:50,339 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:48:50,339 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 03:48:50,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929079651] [2021-06-05 03:48:50,339 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 03:48:50,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:48:50,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 03:48:50,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-05 03:48:50,339 INFO L87 Difference]: Start difference. First operand 6612 states and 18577 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:50,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:48:50,559 INFO L93 Difference]: Finished difference Result 7693 states and 20980 transitions. [2021-06-05 03:48:50,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 03:48:50,559 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 03:48:50,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:48:50,567 INFO L225 Difference]: With dead ends: 7693 [2021-06-05 03:48:50,567 INFO L226 Difference]: Without dead ends: 7662 [2021-06-05 03:48:50,567 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 77.4ms TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:48:50,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7662 states. [2021-06-05 03:48:50,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7662 to 6972. [2021-06-05 03:48:50,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6972 states, 6971 states have (on average 2.7987376273131543) internal successors, (19510), 6971 states have internal predecessors, (19510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:50,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6972 states to 6972 states and 19510 transitions. [2021-06-05 03:48:50,644 INFO L78 Accepts]: Start accepts. Automaton has 6972 states and 19510 transitions. Word has length 29 [2021-06-05 03:48:50,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:48:50,644 INFO L482 AbstractCegarLoop]: Abstraction has 6972 states and 19510 transitions. [2021-06-05 03:48:50,644 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:50,644 INFO L276 IsEmpty]: Start isEmpty. Operand 6972 states and 19510 transitions. [2021-06-05 03:48:50,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 03:48:50,647 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:48:50,647 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:48:50,847 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:48:50,847 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:48:50,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:48:50,848 INFO L82 PathProgramCache]: Analyzing trace with hash 1507649858, now seen corresponding path program 11 times [2021-06-05 03:48:50,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:48:50,848 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459958061] [2021-06-05 03:48:50,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:48:50,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:48:50,889 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:48:50,889 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:48:50,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459958061] [2021-06-05 03:48:50,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459958061] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:48:50,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444722388] [2021-06-05 03:48:50,890 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 03:48:50,923 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 03:48:50,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:48:50,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 03:48:50,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:48:50,995 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:48:50,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444722388] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:48:50,995 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:48:50,996 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-05 03:48:50,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755806919] [2021-06-05 03:48:50,996 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 03:48:50,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:48:50,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 03:48:50,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-06-05 03:48:50,996 INFO L87 Difference]: Start difference. First operand 6972 states and 19510 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:51,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:48:51,131 INFO L93 Difference]: Finished difference Result 6857 states and 19119 transitions. [2021-06-05 03:48:51,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 03:48:51,131 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 03:48:51,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:48:51,139 INFO L225 Difference]: With dead ends: 6857 [2021-06-05 03:48:51,140 INFO L226 Difference]: Without dead ends: 6823 [2021-06-05 03:48:51,140 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 47.1ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-06-05 03:48:51,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6823 states. [2021-06-05 03:48:51,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6823 to 6569. [2021-06-05 03:48:51,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6569 states, 6568 states have (on average 2.82673568818514) internal successors, (18566), 6568 states have internal predecessors, (18566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:51,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6569 states to 6569 states and 18566 transitions. [2021-06-05 03:48:51,243 INFO L78 Accepts]: Start accepts. Automaton has 6569 states and 18566 transitions. Word has length 29 [2021-06-05 03:48:51,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:48:51,243 INFO L482 AbstractCegarLoop]: Abstraction has 6569 states and 18566 transitions. [2021-06-05 03:48:51,243 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:51,243 INFO L276 IsEmpty]: Start isEmpty. Operand 6569 states and 18566 transitions. [2021-06-05 03:48:51,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 03:48:51,246 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:48:51,246 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:48:51,446 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-06-05 03:48:51,446 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:48:51,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:48:51,446 INFO L82 PathProgramCache]: Analyzing trace with hash 1002279274, now seen corresponding path program 8 times [2021-06-05 03:48:51,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:48:51,447 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728245012] [2021-06-05 03:48:51,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:48:51,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:48:51,500 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:48:51,500 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:48:51,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728245012] [2021-06-05 03:48:51,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728245012] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:48:51,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841892085] [2021-06-05 03:48:51,500 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:48:51,526 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:48:51,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:48:51,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 03:48:51,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:48:51,570 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:48:51,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841892085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:48:51,570 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:48:51,570 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 03:48:51,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458532091] [2021-06-05 03:48:51,571 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 03:48:51,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:48:51,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 03:48:51,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 03:48:51,571 INFO L87 Difference]: Start difference. First operand 6569 states and 18566 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:51,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:48:51,696 INFO L93 Difference]: Finished difference Result 6936 states and 19307 transitions. [2021-06-05 03:48:51,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 03:48:51,696 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 03:48:51,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:48:51,703 INFO L225 Difference]: With dead ends: 6936 [2021-06-05 03:48:51,703 INFO L226 Difference]: Without dead ends: 6928 [2021-06-05 03:48:51,703 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 51.0ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-05 03:48:51,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6928 states. [2021-06-05 03:48:51,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6928 to 6620. [2021-06-05 03:48:51,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6620 states, 6619 states have (on average 2.8214231757063) internal successors, (18675), 6619 states have internal predecessors, (18675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:51,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6620 states to 6620 states and 18675 transitions. [2021-06-05 03:48:51,784 INFO L78 Accepts]: Start accepts. Automaton has 6620 states and 18675 transitions. Word has length 29 [2021-06-05 03:48:51,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:48:51,784 INFO L482 AbstractCegarLoop]: Abstraction has 6620 states and 18675 transitions. [2021-06-05 03:48:51,784 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:51,784 INFO L276 IsEmpty]: Start isEmpty. Operand 6620 states and 18675 transitions. [2021-06-05 03:48:51,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 03:48:51,786 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:48:51,786 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:48:51,987 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:48:51,987 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:48:51,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:48:51,987 INFO L82 PathProgramCache]: Analyzing trace with hash -1792355030, now seen corresponding path program 12 times [2021-06-05 03:48:51,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:48:51,987 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337734979] [2021-06-05 03:48:51,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:48:51,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:48:52,031 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:48:52,031 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:48:52,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337734979] [2021-06-05 03:48:52,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337734979] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:48:52,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293450037] [2021-06-05 03:48:52,031 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:48:52,243 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 03:48:52,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:48:52,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 03:48:52,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:48:52,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 03:48:52,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 03:48:52,317 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 03:48:52,319 INFO L628 ElimStorePlain]: treesize reduction 14, result has 6.7 percent of original size [2021-06-05 03:48:52,319 INFO L518 ElimStorePlain]: Eliminatee B vanished before elimination [2021-06-05 03:48:52,319 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 03:48:52,319 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:22, output treesize:1 [2021-06-05 03:48:52,325 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:48:52,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293450037] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:48:52,325 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:48:52,325 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-05 03:48:52,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362644649] [2021-06-05 03:48:52,327 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 03:48:52,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:48:52,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 03:48:52,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 03:48:52,328 INFO L87 Difference]: Start difference. First operand 6620 states and 18675 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:52,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:48:52,465 INFO L93 Difference]: Finished difference Result 6433 states and 17744 transitions. [2021-06-05 03:48:52,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 03:48:52,466 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 03:48:52,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:48:52,473 INFO L225 Difference]: With dead ends: 6433 [2021-06-05 03:48:52,473 INFO L226 Difference]: Without dead ends: 6334 [2021-06-05 03:48:52,473 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 52.6ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-05 03:48:52,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6334 states. [2021-06-05 03:48:52,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6334 to 5949. [2021-06-05 03:48:52,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5949 states, 5948 states have (on average 2.8169132481506387) internal successors, (16755), 5948 states have internal predecessors, (16755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:52,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5949 states to 5949 states and 16755 transitions. [2021-06-05 03:48:52,543 INFO L78 Accepts]: Start accepts. Automaton has 5949 states and 16755 transitions. Word has length 29 [2021-06-05 03:48:52,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:48:52,543 INFO L482 AbstractCegarLoop]: Abstraction has 5949 states and 16755 transitions. [2021-06-05 03:48:52,543 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:52,543 INFO L276 IsEmpty]: Start isEmpty. Operand 5949 states and 16755 transitions. [2021-06-05 03:48:52,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 03:48:52,546 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:48:52,546 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:48:52,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2021-06-05 03:48:52,761 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:48:52,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:48:52,761 INFO L82 PathProgramCache]: Analyzing trace with hash 869370402, now seen corresponding path program 41 times [2021-06-05 03:48:52,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:48:52,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582020973] [2021-06-05 03:48:52,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:48:52,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:48:52,787 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:48:52,787 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:48:52,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582020973] [2021-06-05 03:48:52,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582020973] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:48:52,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914275287] [2021-06-05 03:48:52,787 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:48:52,826 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 03:48:52,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:48:52,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 03:48:52,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:48:52,859 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:48:52,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914275287] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:48:52,860 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:48:52,860 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-05 03:48:52,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860118515] [2021-06-05 03:48:52,860 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 03:48:52,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:48:52,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 03:48:52,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-05 03:48:52,860 INFO L87 Difference]: Start difference. First operand 5949 states and 16755 transitions. Second operand has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:52,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:48:52,954 INFO L93 Difference]: Finished difference Result 6991 states and 19595 transitions. [2021-06-05 03:48:52,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 03:48:52,954 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 03:48:52,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:48:52,963 INFO L225 Difference]: With dead ends: 6991 [2021-06-05 03:48:52,963 INFO L226 Difference]: Without dead ends: 6978 [2021-06-05 03:48:52,963 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.9ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-05 03:48:52,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6978 states. [2021-06-05 03:48:53,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6978 to 6732. [2021-06-05 03:48:53,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6732 states, 6731 states have (on average 2.834794235626207) internal successors, (19081), 6731 states have internal predecessors, (19081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:53,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6732 states to 6732 states and 19081 transitions. [2021-06-05 03:48:53,082 INFO L78 Accepts]: Start accepts. Automaton has 6732 states and 19081 transitions. Word has length 29 [2021-06-05 03:48:53,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:48:53,082 INFO L482 AbstractCegarLoop]: Abstraction has 6732 states and 19081 transitions. [2021-06-05 03:48:53,082 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:53,082 INFO L276 IsEmpty]: Start isEmpty. Operand 6732 states and 19081 transitions. [2021-06-05 03:48:53,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 03:48:53,085 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:48:53,085 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:48:53,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:48:53,297 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:48:53,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:48:53,297 INFO L82 PathProgramCache]: Analyzing trace with hash -109137342, now seen corresponding path program 13 times [2021-06-05 03:48:53,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:48:53,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532236109] [2021-06-05 03:48:53,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:48:53,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:48:53,338 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:48:53,339 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:48:53,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532236109] [2021-06-05 03:48:53,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532236109] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:48:53,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337711540] [2021-06-05 03:48:53,339 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:48:53,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:48:53,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 03:48:53,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:48:53,401 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:48:53,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337711540] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:48:53,401 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:48:53,401 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 03:48:53,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700654522] [2021-06-05 03:48:53,401 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 03:48:53,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:48:53,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 03:48:53,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-06-05 03:48:53,402 INFO L87 Difference]: Start difference. First operand 6732 states and 19081 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:53,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:48:53,544 INFO L93 Difference]: Finished difference Result 6655 states and 18587 transitions. [2021-06-05 03:48:53,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 03:48:53,545 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 03:48:53,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:48:53,551 INFO L225 Difference]: With dead ends: 6655 [2021-06-05 03:48:53,551 INFO L226 Difference]: Without dead ends: 6601 [2021-06-05 03:48:53,551 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 85.3ms TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:48:53,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6601 states. [2021-06-05 03:48:53,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6601 to 6248. [2021-06-05 03:48:53,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6248 states, 6247 states have (on average 2.8304786297422764) internal successors, (17682), 6247 states have internal predecessors, (17682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:53,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6248 states to 6248 states and 17682 transitions. [2021-06-05 03:48:53,618 INFO L78 Accepts]: Start accepts. Automaton has 6248 states and 17682 transitions. Word has length 29 [2021-06-05 03:48:53,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:48:53,618 INFO L482 AbstractCegarLoop]: Abstraction has 6248 states and 17682 transitions. [2021-06-05 03:48:53,618 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:53,618 INFO L276 IsEmpty]: Start isEmpty. Operand 6248 states and 17682 transitions. [2021-06-05 03:48:53,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 03:48:53,622 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:48:53,622 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:48:53,822 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:48:53,827 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:48:53,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:48:53,828 INFO L82 PathProgramCache]: Analyzing trace with hash -1428842088, now seen corresponding path program 42 times [2021-06-05 03:48:53,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:48:53,828 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332773109] [2021-06-05 03:48:53,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:48:53,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:48:53,877 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:48:53,877 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:48:53,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332773109] [2021-06-05 03:48:53,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332773109] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:48:53,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738588998] [2021-06-05 03:48:53,877 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:48:53,911 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 03:48:53,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:48:53,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 03:48:53,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:48:53,953 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:48:53,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738588998] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:48:53,953 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:48:53,953 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 03:48:53,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081050981] [2021-06-05 03:48:53,953 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 03:48:53,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:48:53,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 03:48:53,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-05 03:48:53,954 INFO L87 Difference]: Start difference. First operand 6248 states and 17682 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:54,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:48:54,131 INFO L93 Difference]: Finished difference Result 6779 states and 18724 transitions. [2021-06-05 03:48:54,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 03:48:54,131 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 03:48:54,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:48:54,138 INFO L225 Difference]: With dead ends: 6779 [2021-06-05 03:48:54,138 INFO L226 Difference]: Without dead ends: 6779 [2021-06-05 03:48:54,138 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 100.1ms TimeCoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:48:54,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6779 states. [2021-06-05 03:48:54,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6779 to 6214. [2021-06-05 03:48:54,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6214 states, 6213 states have (on average 2.829550941574119) internal successors, (17580), 6213 states have internal predecessors, (17580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:54,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6214 states to 6214 states and 17580 transitions. [2021-06-05 03:48:54,208 INFO L78 Accepts]: Start accepts. Automaton has 6214 states and 17580 transitions. Word has length 32 [2021-06-05 03:48:54,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:48:54,208 INFO L482 AbstractCegarLoop]: Abstraction has 6214 states and 17580 transitions. [2021-06-05 03:48:54,208 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:54,208 INFO L276 IsEmpty]: Start isEmpty. Operand 6214 states and 17580 transitions. [2021-06-05 03:48:54,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 03:48:54,212 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:48:54,212 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:48:54,427 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:48:54,427 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:48:54,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:48:54,428 INFO L82 PathProgramCache]: Analyzing trace with hash -1675261659, now seen corresponding path program 43 times [2021-06-05 03:48:54,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:48:54,428 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626936490] [2021-06-05 03:48:54,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:48:54,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:48:54,510 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 15 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:48:54,510 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:48:54,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626936490] [2021-06-05 03:48:54,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626936490] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:48:54,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694622617] [2021-06-05 03:48:54,511 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:48:54,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:48:54,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 03:48:54,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:48:54,624 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 15 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:48:54,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694622617] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:48:54,625 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:48:54,625 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 9 [2021-06-05 03:48:54,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822557129] [2021-06-05 03:48:54,625 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 03:48:54,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:48:54,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 03:48:54,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-05 03:48:54,626 INFO L87 Difference]: Start difference. First operand 6214 states and 17580 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:54,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:48:54,752 INFO L93 Difference]: Finished difference Result 9059 states and 24818 transitions. [2021-06-05 03:48:54,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 03:48:54,752 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 03:48:54,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:48:54,761 INFO L225 Difference]: With dead ends: 9059 [2021-06-05 03:48:54,762 INFO L226 Difference]: Without dead ends: 9035 [2021-06-05 03:48:54,762 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 98.0ms TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:48:54,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9035 states. [2021-06-05 03:48:54,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9035 to 7541. [2021-06-05 03:48:54,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7541 states, 7540 states have (on average 2.8545092838196284) internal successors, (21523), 7540 states have internal predecessors, (21523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:54,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7541 states to 7541 states and 21523 transitions. [2021-06-05 03:48:54,854 INFO L78 Accepts]: Start accepts. Automaton has 7541 states and 21523 transitions. Word has length 32 [2021-06-05 03:48:54,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:48:54,854 INFO L482 AbstractCegarLoop]: Abstraction has 7541 states and 21523 transitions. [2021-06-05 03:48:54,855 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:54,855 INFO L276 IsEmpty]: Start isEmpty. Operand 7541 states and 21523 transitions. [2021-06-05 03:48:54,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 03:48:54,858 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:48:54,858 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:48:55,058 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-06-05 03:48:55,058 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:48:55,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:48:55,059 INFO L82 PathProgramCache]: Analyzing trace with hash -1825167733, now seen corresponding path program 44 times [2021-06-05 03:48:55,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:48:55,059 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262929289] [2021-06-05 03:48:55,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:48:55,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:48:55,093 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 19 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:48:55,093 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:48:55,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262929289] [2021-06-05 03:48:55,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262929289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:48:55,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230534690] [2021-06-05 03:48:55,093 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:48:55,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:48:55,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:48:55,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 03:48:55,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:48:55,158 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 20 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:48:55,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230534690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:48:55,158 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:48:55,158 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 7 [2021-06-05 03:48:55,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094841151] [2021-06-05 03:48:55,159 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 03:48:55,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:48:55,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 03:48:55,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-06-05 03:48:55,159 INFO L87 Difference]: Start difference. First operand 7541 states and 21523 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:55,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:48:55,294 INFO L93 Difference]: Finished difference Result 9025 states and 24686 transitions. [2021-06-05 03:48:55,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 03:48:55,294 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 03:48:55,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:48:55,304 INFO L225 Difference]: With dead ends: 9025 [2021-06-05 03:48:55,305 INFO L226 Difference]: Without dead ends: 9025 [2021-06-05 03:48:55,305 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 54.0ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:48:55,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9025 states. [2021-06-05 03:48:55,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9025 to 7365. [2021-06-05 03:48:55,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7365 states, 7364 states have (on average 2.8473655621944594) internal successors, (20968), 7364 states have internal predecessors, (20968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:55,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7365 states to 7365 states and 20968 transitions. [2021-06-05 03:48:55,399 INFO L78 Accepts]: Start accepts. Automaton has 7365 states and 20968 transitions. Word has length 32 [2021-06-05 03:48:55,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:48:55,399 INFO L482 AbstractCegarLoop]: Abstraction has 7365 states and 20968 transitions. [2021-06-05 03:48:55,399 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:55,399 INFO L276 IsEmpty]: Start isEmpty. Operand 7365 states and 20968 transitions. [2021-06-05 03:48:55,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 03:48:55,402 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:48:55,402 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:48:55,602 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-06-05 03:48:55,603 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:48:55,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:48:55,603 INFO L82 PathProgramCache]: Analyzing trace with hash 1537983116, now seen corresponding path program 45 times [2021-06-05 03:48:55,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:48:55,603 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742430578] [2021-06-05 03:48:55,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:48:55,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:48:55,633 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 21 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:48:55,633 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:48:55,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742430578] [2021-06-05 03:48:55,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742430578] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:48:55,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470666025] [2021-06-05 03:48:55,633 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:48:55,655 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 03:48:55,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:48:55,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 03:48:55,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:48:55,794 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-06-05 03:48:55,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470666025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:48:55,795 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:48:55,795 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 13 [2021-06-05 03:48:55,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762083570] [2021-06-05 03:48:55,795 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:48:55,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:48:55,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:48:55,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:48:55,795 INFO L87 Difference]: Start difference. First operand 7365 states and 20968 transitions. Second operand has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 13 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:56,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:48:56,140 INFO L93 Difference]: Finished difference Result 8303 states and 22757 transitions. [2021-06-05 03:48:56,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 03:48:56,140 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 13 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 03:48:56,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:48:56,148 INFO L225 Difference]: With dead ends: 8303 [2021-06-05 03:48:56,148 INFO L226 Difference]: Without dead ends: 8260 [2021-06-05 03:48:56,148 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 268.1ms TimeCoverageRelationStatistics Valid=190, Invalid=680, Unknown=0, NotChecked=0, Total=870 [2021-06-05 03:48:56,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8260 states. [2021-06-05 03:48:56,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8260 to 7571. [2021-06-05 03:48:56,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7571 states, 7570 states have (on average 2.81664464993395) internal successors, (21322), 7570 states have internal predecessors, (21322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:56,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7571 states to 7571 states and 21322 transitions. [2021-06-05 03:48:56,235 INFO L78 Accepts]: Start accepts. Automaton has 7571 states and 21322 transitions. Word has length 32 [2021-06-05 03:48:56,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:48:56,236 INFO L482 AbstractCegarLoop]: Abstraction has 7571 states and 21322 transitions. [2021-06-05 03:48:56,236 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 13 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:56,236 INFO L276 IsEmpty]: Start isEmpty. Operand 7571 states and 21322 transitions. [2021-06-05 03:48:56,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 03:48:56,239 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:48:56,239 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:48:56,439 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-06-05 03:48:56,440 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:48:56,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:48:56,440 INFO L82 PathProgramCache]: Analyzing trace with hash 1465178531, now seen corresponding path program 46 times [2021-06-05 03:48:56,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:48:56,440 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265080372] [2021-06-05 03:48:56,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:48:56,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:48:56,484 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:48:56,484 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:48:56,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265080372] [2021-06-05 03:48:56,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265080372] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:48:56,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671045671] [2021-06-05 03:48:56,484 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:48:56,506 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:48:56,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:48:56,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 03:48:56,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:48:56,562 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 11 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:48:56,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671045671] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:48:56,562 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:48:56,562 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 8 [2021-06-05 03:48:56,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313942197] [2021-06-05 03:48:56,562 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 03:48:56,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:48:56,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 03:48:56,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-06-05 03:48:56,562 INFO L87 Difference]: Start difference. First operand 7571 states and 21322 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:56,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:48:56,724 INFO L93 Difference]: Finished difference Result 13088 states and 35868 transitions. [2021-06-05 03:48:56,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 03:48:56,724 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 03:48:56,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:48:56,739 INFO L225 Difference]: With dead ends: 13088 [2021-06-05 03:48:56,739 INFO L226 Difference]: Without dead ends: 13088 [2021-06-05 03:48:56,739 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 73.2ms TimeCoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:48:56,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13088 states. [2021-06-05 03:48:56,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13088 to 10587. [2021-06-05 03:48:56,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10587 states, 10586 states have (on average 2.8707727186850556) internal successors, (30390), 10586 states have internal predecessors, (30390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:56,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10587 states to 10587 states and 30390 transitions. [2021-06-05 03:48:56,913 INFO L78 Accepts]: Start accepts. Automaton has 10587 states and 30390 transitions. Word has length 32 [2021-06-05 03:48:56,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:48:56,913 INFO L482 AbstractCegarLoop]: Abstraction has 10587 states and 30390 transitions. [2021-06-05 03:48:56,913 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:56,913 INFO L276 IsEmpty]: Start isEmpty. Operand 10587 states and 30390 transitions. [2021-06-05 03:48:56,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 03:48:56,917 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:48:56,917 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:48:57,117 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:48:57,118 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:48:57,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:48:57,118 INFO L82 PathProgramCache]: Analyzing trace with hash 1653853746, now seen corresponding path program 47 times [2021-06-05 03:48:57,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:48:57,118 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655032112] [2021-06-05 03:48:57,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:48:57,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:48:57,161 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:48:57,161 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:48:57,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655032112] [2021-06-05 03:48:57,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655032112] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:48:57,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368356722] [2021-06-05 03:48:57,161 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:48:57,188 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 03:48:57,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:48:57,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 03:48:57,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:48:57,245 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 9 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:48:57,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368356722] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:48:57,245 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:48:57,245 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 8 [2021-06-05 03:48:57,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237480053] [2021-06-05 03:48:57,246 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 03:48:57,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:48:57,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 03:48:57,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-06-05 03:48:57,246 INFO L87 Difference]: Start difference. First operand 10587 states and 30390 transitions. Second operand has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:57,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:48:57,406 INFO L93 Difference]: Finished difference Result 11705 states and 32668 transitions. [2021-06-05 03:48:57,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 03:48:57,406 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 03:48:57,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:48:57,420 INFO L225 Difference]: With dead ends: 11705 [2021-06-05 03:48:57,420 INFO L226 Difference]: Without dead ends: 11705 [2021-06-05 03:48:57,420 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 65.1ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:48:57,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11705 states. [2021-06-05 03:48:57,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11705 to 10573. [2021-06-05 03:48:57,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10573 states, 10572 states have (on average 2.8569807037457435) internal successors, (30204), 10572 states have internal predecessors, (30204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:57,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10573 states to 10573 states and 30204 transitions. [2021-06-05 03:48:57,551 INFO L78 Accepts]: Start accepts. Automaton has 10573 states and 30204 transitions. Word has length 32 [2021-06-05 03:48:57,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:48:57,551 INFO L482 AbstractCegarLoop]: Abstraction has 10573 states and 30204 transitions. [2021-06-05 03:48:57,551 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:57,551 INFO L276 IsEmpty]: Start isEmpty. Operand 10573 states and 30204 transitions. [2021-06-05 03:48:57,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 03:48:57,555 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:48:57,555 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:48:57,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-06-05 03:48:57,756 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:48:57,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:48:57,756 INFO L82 PathProgramCache]: Analyzing trace with hash 2101937765, now seen corresponding path program 48 times [2021-06-05 03:48:57,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:48:57,756 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989379565] [2021-06-05 03:48:57,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:48:57,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:48:57,789 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 25 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:48:57,789 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:48:57,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989379565] [2021-06-05 03:48:57,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989379565] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:48:57,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704254802] [2021-06-05 03:48:57,790 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:48:57,813 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 03:48:57,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:48:57,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 03:48:57,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:48:57,864 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 27 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:48:57,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704254802] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:48:57,864 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:48:57,864 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 7 [2021-06-05 03:48:57,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673513791] [2021-06-05 03:48:57,865 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 03:48:57,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:48:57,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 03:48:57,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 03:48:57,865 INFO L87 Difference]: Start difference. First operand 10573 states and 30204 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:58,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:48:58,012 INFO L93 Difference]: Finished difference Result 17407 states and 48712 transitions. [2021-06-05 03:48:58,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 03:48:58,013 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 03:48:58,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:48:58,034 INFO L225 Difference]: With dead ends: 17407 [2021-06-05 03:48:58,034 INFO L226 Difference]: Without dead ends: 17375 [2021-06-05 03:48:58,034 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 40.9ms TimeCoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-06-05 03:48:58,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17375 states. [2021-06-05 03:48:58,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17375 to 13902. [2021-06-05 03:48:58,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13902 states, 13901 states have (on average 2.8969138910869723) internal successors, (40270), 13901 states have internal predecessors, (40270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:58,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13902 states to 13902 states and 40270 transitions. [2021-06-05 03:48:58,262 INFO L78 Accepts]: Start accepts. Automaton has 13902 states and 40270 transitions. Word has length 32 [2021-06-05 03:48:58,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:48:58,263 INFO L482 AbstractCegarLoop]: Abstraction has 13902 states and 40270 transitions. [2021-06-05 03:48:58,263 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:58,263 INFO L276 IsEmpty]: Start isEmpty. Operand 13902 states and 40270 transitions. [2021-06-05 03:48:58,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 03:48:58,267 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:48:58,267 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:48:58,467 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-06-05 03:48:58,467 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:48:58,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:48:58,468 INFO L82 PathProgramCache]: Analyzing trace with hash 1480057355, now seen corresponding path program 49 times [2021-06-05 03:48:58,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:48:58,468 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852060564] [2021-06-05 03:48:58,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:48:58,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:48:58,499 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 24 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:48:58,499 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:48:58,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852060564] [2021-06-05 03:48:58,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852060564] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:48:58,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186898024] [2021-06-05 03:48:58,499 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:48:58,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:48:58,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 03:48:58,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:48:58,567 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 26 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:48:58,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186898024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:48:58,568 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:48:58,568 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 7 [2021-06-05 03:48:58,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951484140] [2021-06-05 03:48:58,568 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 03:48:58,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:48:58,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 03:48:58,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 03:48:58,572 INFO L87 Difference]: Start difference. First operand 13902 states and 40270 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:58,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:48:58,731 INFO L93 Difference]: Finished difference Result 17229 states and 47592 transitions. [2021-06-05 03:48:58,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 03:48:58,731 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 03:48:58,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:48:58,753 INFO L225 Difference]: With dead ends: 17229 [2021-06-05 03:48:58,753 INFO L226 Difference]: Without dead ends: 17226 [2021-06-05 03:48:58,754 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 51.2ms TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:48:58,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17226 states. [2021-06-05 03:48:58,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17226 to 13921. [2021-06-05 03:48:58,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13921 states, 13920 states have (on average 2.8902298850574715) internal successors, (40232), 13920 states have internal predecessors, (40232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:58,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13921 states to 13921 states and 40232 transitions. [2021-06-05 03:48:58,956 INFO L78 Accepts]: Start accepts. Automaton has 13921 states and 40232 transitions. Word has length 32 [2021-06-05 03:48:58,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:48:58,956 INFO L482 AbstractCegarLoop]: Abstraction has 13921 states and 40232 transitions. [2021-06-05 03:48:58,956 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:58,956 INFO L276 IsEmpty]: Start isEmpty. Operand 13921 states and 40232 transitions. [2021-06-05 03:48:58,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 03:48:58,960 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:48:58,960 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:48:59,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2021-06-05 03:48:59,160 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:48:59,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:48:59,161 INFO L82 PathProgramCache]: Analyzing trace with hash -157515101, now seen corresponding path program 50 times [2021-06-05 03:48:59,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:48:59,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869795039] [2021-06-05 03:48:59,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:48:59,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:48:59,202 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 25 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:48:59,202 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:48:59,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869795039] [2021-06-05 03:48:59,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869795039] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:48:59,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383538990] [2021-06-05 03:48:59,202 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 03:48:59,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:48:59,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:48:59,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 03:48:59,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:48:59,281 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 26 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:48:59,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383538990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:48:59,281 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:48:59,281 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 8 [2021-06-05 03:48:59,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488907309] [2021-06-05 03:48:59,281 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 03:48:59,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:48:59,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 03:48:59,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-06-05 03:48:59,281 INFO L87 Difference]: Start difference. First operand 13921 states and 40232 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:59,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:48:59,508 INFO L93 Difference]: Finished difference Result 17332 states and 47741 transitions. [2021-06-05 03:48:59,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 03:48:59,509 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 03:48:59,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:48:59,527 INFO L225 Difference]: With dead ends: 17332 [2021-06-05 03:48:59,527 INFO L226 Difference]: Without dead ends: 17329 [2021-06-05 03:48:59,527 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 68.8ms TimeCoverageRelationStatistics Valid=81, Invalid=129, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:48:59,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17329 states. [2021-06-05 03:48:59,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17329 to 13802. [2021-06-05 03:48:59,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13802 states, 13801 states have (on average 2.883124411274545) internal successors, (39790), 13801 states have internal predecessors, (39790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:59,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13802 states to 13802 states and 39790 transitions. [2021-06-05 03:48:59,712 INFO L78 Accepts]: Start accepts. Automaton has 13802 states and 39790 transitions. Word has length 32 [2021-06-05 03:48:59,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:48:59,712 INFO L482 AbstractCegarLoop]: Abstraction has 13802 states and 39790 transitions. [2021-06-05 03:48:59,712 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:48:59,712 INFO L276 IsEmpty]: Start isEmpty. Operand 13802 states and 39790 transitions. [2021-06-05 03:48:59,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 03:48:59,716 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:48:59,716 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:48:59,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-06-05 03:48:59,917 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:48:59,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:48:59,917 INFO L82 PathProgramCache]: Analyzing trace with hash 188377863, now seen corresponding path program 51 times [2021-06-05 03:48:59,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:48:59,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145671811] [2021-06-05 03:48:59,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:48:59,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:48:59,971 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 15 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:48:59,971 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:48:59,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145671811] [2021-06-05 03:48:59,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145671811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:48:59,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792351304] [2021-06-05 03:48:59,971 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:48:59,994 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 03:48:59,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:48:59,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 03:48:59,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:49:00,134 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-06-05 03:49:00,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792351304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:00,134 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:49:00,134 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 16 [2021-06-05 03:49:00,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892903650] [2021-06-05 03:49:00,135 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 03:49:00,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:49:00,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 03:49:00,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:49:00,135 INFO L87 Difference]: Start difference. First operand 13802 states and 39790 transitions. Second operand has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:01,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:49:01,030 INFO L93 Difference]: Finished difference Result 22708 states and 63895 transitions. [2021-06-05 03:49:01,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 03:49:01,030 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 03:49:01,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:49:01,058 INFO L225 Difference]: With dead ends: 22708 [2021-06-05 03:49:01,058 INFO L226 Difference]: Without dead ends: 22654 [2021-06-05 03:49:01,058 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 728 ImplicationChecksByTransitivity, 704.1ms TimeCoverageRelationStatistics Valid=535, Invalid=1817, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 03:49:01,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22654 states. [2021-06-05 03:49:01,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22654 to 15246. [2021-06-05 03:49:01,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15246 states, 15245 states have (on average 2.8751065923253525) internal successors, (43831), 15245 states have internal predecessors, (43831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:01,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15246 states to 15246 states and 43831 transitions. [2021-06-05 03:49:01,296 INFO L78 Accepts]: Start accepts. Automaton has 15246 states and 43831 transitions. Word has length 32 [2021-06-05 03:49:01,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:49:01,296 INFO L482 AbstractCegarLoop]: Abstraction has 15246 states and 43831 transitions. [2021-06-05 03:49:01,296 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:01,296 INFO L276 IsEmpty]: Start isEmpty. Operand 15246 states and 43831 transitions. [2021-06-05 03:49:01,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 03:49:01,302 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:49:01,303 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:49:01,503 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-06-05 03:49:01,503 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:49:01,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:49:01,503 INFO L82 PathProgramCache]: Analyzing trace with hash -639720651, now seen corresponding path program 9 times [2021-06-05 03:49:01,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:49:01,503 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480690521] [2021-06-05 03:49:01,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:49:01,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:01,562 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:49:01,562 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:49:01,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480690521] [2021-06-05 03:49:01,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480690521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:01,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954445050] [2021-06-05 03:49:01,563 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:01,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 03:49:01,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:49:01,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 03:49:01,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:49:01,637 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:49:01,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954445050] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:01,638 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:49:01,638 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 03:49:01,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206437810] [2021-06-05 03:49:01,638 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 03:49:01,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:49:01,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 03:49:01,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-05 03:49:01,638 INFO L87 Difference]: Start difference. First operand 15246 states and 43831 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:01,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:49:01,974 INFO L93 Difference]: Finished difference Result 15940 states and 45262 transitions. [2021-06-05 03:49:01,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 03:49:01,974 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 03:49:01,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:49:01,993 INFO L225 Difference]: With dead ends: 15940 [2021-06-05 03:49:01,993 INFO L226 Difference]: Without dead ends: 15903 [2021-06-05 03:49:01,994 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 143.1ms TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:49:02,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15903 states. [2021-06-05 03:49:02,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15903 to 15141. [2021-06-05 03:49:02,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15141 states, 15140 states have (on average 2.8762879788639366) internal successors, (43547), 15140 states have internal predecessors, (43547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:02,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15141 states to 15141 states and 43547 transitions. [2021-06-05 03:49:02,247 INFO L78 Accepts]: Start accepts. Automaton has 15141 states and 43547 transitions. Word has length 35 [2021-06-05 03:49:02,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:49:02,248 INFO L482 AbstractCegarLoop]: Abstraction has 15141 states and 43547 transitions. [2021-06-05 03:49:02,248 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:02,248 INFO L276 IsEmpty]: Start isEmpty. Operand 15141 states and 43547 transitions. [2021-06-05 03:49:02,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 03:49:02,254 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:49:02,254 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:49:02,454 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:02,454 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:49:02,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:49:02,455 INFO L82 PathProgramCache]: Analyzing trace with hash 827459317, now seen corresponding path program 14 times [2021-06-05 03:49:02,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:49:02,455 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359837935] [2021-06-05 03:49:02,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:49:02,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:02,528 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:49:02,528 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:49:02,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359837935] [2021-06-05 03:49:02,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359837935] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:02,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993624313] [2021-06-05 03:49:02,528 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:02,552 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:49:02,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:49:02,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 03:49:02,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:49:02,695 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:49:02,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993624313] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:02,695 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:49:02,695 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 03:49:02,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207528584] [2021-06-05 03:49:02,696 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:49:02,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:49:02,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:49:02,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:49:02,696 INFO L87 Difference]: Start difference. First operand 15141 states and 43547 transitions. Second operand has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:03,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:49:03,070 INFO L93 Difference]: Finished difference Result 15119 states and 43386 transitions. [2021-06-05 03:49:03,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 03:49:03,071 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 03:49:03,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:49:03,090 INFO L225 Difference]: With dead ends: 15119 [2021-06-05 03:49:03,090 INFO L226 Difference]: Without dead ends: 15016 [2021-06-05 03:49:03,090 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 107.7ms TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:49:03,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15016 states. [2021-06-05 03:49:03,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15016 to 14977. [2021-06-05 03:49:03,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14977 states, 14976 states have (on average 2.878605769230769) internal successors, (43110), 14976 states have internal predecessors, (43110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:03,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14977 states to 14977 states and 43110 transitions. [2021-06-05 03:49:03,282 INFO L78 Accepts]: Start accepts. Automaton has 14977 states and 43110 transitions. Word has length 35 [2021-06-05 03:49:03,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:49:03,282 INFO L482 AbstractCegarLoop]: Abstraction has 14977 states and 43110 transitions. [2021-06-05 03:49:03,282 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:03,282 INFO L276 IsEmpty]: Start isEmpty. Operand 14977 states and 43110 transitions. [2021-06-05 03:49:03,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 03:49:03,288 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:49:03,288 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:49:03,489 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-06-05 03:49:03,489 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:49:03,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:49:03,490 INFO L82 PathProgramCache]: Analyzing trace with hash 999532737, now seen corresponding path program 15 times [2021-06-05 03:49:03,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:49:03,490 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298957597] [2021-06-05 03:49:03,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:49:03,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:03,545 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:49:03,545 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:49:03,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298957597] [2021-06-05 03:49:03,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298957597] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:03,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357380653] [2021-06-05 03:49:03,545 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:03,569 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 03:49:03,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:49:03,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 03:49:03,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:49:03,620 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:49:03,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357380653] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:03,621 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:49:03,621 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-06-05 03:49:03,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117247732] [2021-06-05 03:49:03,621 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 03:49:03,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:49:03,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 03:49:03,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-05 03:49:03,621 INFO L87 Difference]: Start difference. First operand 14977 states and 43110 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:03,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:49:03,763 INFO L93 Difference]: Finished difference Result 15202 states and 43548 transitions. [2021-06-05 03:49:03,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 03:49:03,763 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 03:49:03,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:49:03,782 INFO L225 Difference]: With dead ends: 15202 [2021-06-05 03:49:03,782 INFO L226 Difference]: Without dead ends: 15202 [2021-06-05 03:49:03,783 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 63.3ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-05 03:49:03,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15202 states. [2021-06-05 03:49:03,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15202 to 14977. [2021-06-05 03:49:03,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14977 states, 14976 states have (on average 2.878605769230769) internal successors, (43110), 14976 states have internal predecessors, (43110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:04,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14977 states to 14977 states and 43110 transitions. [2021-06-05 03:49:04,010 INFO L78 Accepts]: Start accepts. Automaton has 14977 states and 43110 transitions. Word has length 35 [2021-06-05 03:49:04,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:49:04,010 INFO L482 AbstractCegarLoop]: Abstraction has 14977 states and 43110 transitions. [2021-06-05 03:49:04,010 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:04,010 INFO L276 IsEmpty]: Start isEmpty. Operand 14977 states and 43110 transitions. [2021-06-05 03:49:04,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 03:49:04,016 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:49:04,016 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:49:04,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:04,216 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:49:04,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:49:04,217 INFO L82 PathProgramCache]: Analyzing trace with hash -1845490552, now seen corresponding path program 10 times [2021-06-05 03:49:04,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:49:04,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930096780] [2021-06-05 03:49:04,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:49:04,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:04,280 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 27 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:49:04,280 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:49:04,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930096780] [2021-06-05 03:49:04,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930096780] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:04,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451424186] [2021-06-05 03:49:04,281 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:04,303 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:49:04,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:49:04,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 03:49:04,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:49:04,361 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 27 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:49:04,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451424186] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:04,361 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:49:04,361 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 11 [2021-06-05 03:49:04,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327790319] [2021-06-05 03:49:04,362 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 03:49:04,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:49:04,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 03:49:04,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:49:04,362 INFO L87 Difference]: Start difference. First operand 14977 states and 43110 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:04,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:49:04,540 INFO L93 Difference]: Finished difference Result 16718 states and 46945 transitions. [2021-06-05 03:49:04,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 03:49:04,541 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 03:49:04,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:49:04,563 INFO L225 Difference]: With dead ends: 16718 [2021-06-05 03:49:04,563 INFO L226 Difference]: Without dead ends: 16694 [2021-06-05 03:49:04,563 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 87.3ms TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:49:04,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16694 states. [2021-06-05 03:49:04,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16694 to 15013. [2021-06-05 03:49:04,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15013 states, 15012 states have (on average 2.8758326671995738) internal successors, (43172), 15012 states have internal predecessors, (43172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:04,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15013 states to 15013 states and 43172 transitions. [2021-06-05 03:49:04,772 INFO L78 Accepts]: Start accepts. Automaton has 15013 states and 43172 transitions. Word has length 35 [2021-06-05 03:49:04,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:49:04,772 INFO L482 AbstractCegarLoop]: Abstraction has 15013 states and 43172 transitions. [2021-06-05 03:49:04,772 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:04,772 INFO L276 IsEmpty]: Start isEmpty. Operand 15013 states and 43172 transitions. [2021-06-05 03:49:04,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 03:49:04,777 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:49:04,777 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:49:04,978 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:04,978 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:49:04,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:49:04,978 INFO L82 PathProgramCache]: Analyzing trace with hash -731106251, now seen corresponding path program 16 times [2021-06-05 03:49:04,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:49:04,978 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185878000] [2021-06-05 03:49:04,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:49:04,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:05,031 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:49:05,032 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:49:05,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185878000] [2021-06-05 03:49:05,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185878000] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:05,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972473926] [2021-06-05 03:49:05,032 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:05,054 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:49:05,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:49:05,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 03:49:05,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:49:05,115 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 31 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:49:05,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1972473926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:05,115 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:49:05,115 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-06-05 03:49:05,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333825717] [2021-06-05 03:49:05,115 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 03:49:05,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:49:05,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 03:49:05,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-05 03:49:05,116 INFO L87 Difference]: Start difference. First operand 15013 states and 43172 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:05,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:49:05,350 INFO L93 Difference]: Finished difference Result 15432 states and 43972 transitions. [2021-06-05 03:49:05,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 03:49:05,350 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 03:49:05,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:49:05,370 INFO L225 Difference]: With dead ends: 15432 [2021-06-05 03:49:05,370 INFO L226 Difference]: Without dead ends: 15289 [2021-06-05 03:49:05,370 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 59.6ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-05 03:49:05,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15289 states. [2021-06-05 03:49:05,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15289 to 14996. [2021-06-05 03:49:05,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14996 states, 14995 states have (on average 2.8635545181727244) internal successors, (42939), 14995 states have internal predecessors, (42939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:05,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14996 states to 14996 states and 42939 transitions. [2021-06-05 03:49:05,602 INFO L78 Accepts]: Start accepts. Automaton has 14996 states and 42939 transitions. Word has length 35 [2021-06-05 03:49:05,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:49:05,602 INFO L482 AbstractCegarLoop]: Abstraction has 14996 states and 42939 transitions. [2021-06-05 03:49:05,602 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:05,603 INFO L276 IsEmpty]: Start isEmpty. Operand 14996 states and 42939 transitions. [2021-06-05 03:49:05,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 03:49:05,608 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:49:05,608 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:49:05,808 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-06-05 03:49:05,809 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:49:05,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:49:05,809 INFO L82 PathProgramCache]: Analyzing trace with hash -1344642431, now seen corresponding path program 17 times [2021-06-05 03:49:05,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:49:05,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291994396] [2021-06-05 03:49:05,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:49:05,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:05,857 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 27 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 03:49:05,857 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:49:05,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291994396] [2021-06-05 03:49:05,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291994396] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:05,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172578518] [2021-06-05 03:49:05,857 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:05,880 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 03:49:05,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:49:05,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 03:49:05,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:49:05,927 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 03:49:05,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172578518] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:05,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:49:05,928 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-06-05 03:49:05,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565293093] [2021-06-05 03:49:05,928 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 03:49:05,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:49:05,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 03:49:05,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-05 03:49:05,928 INFO L87 Difference]: Start difference. First operand 14996 states and 42939 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:06,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:49:06,108 INFO L93 Difference]: Finished difference Result 15805 states and 44721 transitions. [2021-06-05 03:49:06,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 03:49:06,109 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 03:49:06,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:49:06,128 INFO L225 Difference]: With dead ends: 15805 [2021-06-05 03:49:06,128 INFO L226 Difference]: Without dead ends: 15793 [2021-06-05 03:49:06,128 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 61.0ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-05 03:49:06,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15793 states. [2021-06-05 03:49:06,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15793 to 15263. [2021-06-05 03:49:06,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15263 states, 15262 states have (on average 2.8567029222906566) internal successors, (43599), 15262 states have internal predecessors, (43599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:06,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15263 states to 15263 states and 43599 transitions. [2021-06-05 03:49:06,328 INFO L78 Accepts]: Start accepts. Automaton has 15263 states and 43599 transitions. Word has length 35 [2021-06-05 03:49:06,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:49:06,329 INFO L482 AbstractCegarLoop]: Abstraction has 15263 states and 43599 transitions. [2021-06-05 03:49:06,329 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:06,329 INFO L276 IsEmpty]: Start isEmpty. Operand 15263 states and 43599 transitions. [2021-06-05 03:49:06,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 03:49:06,334 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:49:06,334 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:49:06,534 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-06-05 03:49:06,535 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:49:06,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:49:06,535 INFO L82 PathProgramCache]: Analyzing trace with hash 797274903, now seen corresponding path program 18 times [2021-06-05 03:49:06,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:49:06,535 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397299505] [2021-06-05 03:49:06,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:49:06,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:06,580 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:49:06,580 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:49:06,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397299505] [2021-06-05 03:49:06,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397299505] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:06,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458065845] [2021-06-05 03:49:06,580 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:06,615 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 03:49:06,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:49:06,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 03:49:06,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:49:06,660 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:49:06,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458065845] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:06,661 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:49:06,661 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 03:49:06,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381445941] [2021-06-05 03:49:06,661 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 03:49:06,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:49:06,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 03:49:06,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-06-05 03:49:06,661 INFO L87 Difference]: Start difference. First operand 15263 states and 43599 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:06,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:49:06,955 INFO L93 Difference]: Finished difference Result 16259 states and 45639 transitions. [2021-06-05 03:49:06,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 03:49:06,956 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 03:49:06,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:49:06,974 INFO L225 Difference]: With dead ends: 16259 [2021-06-05 03:49:06,974 INFO L226 Difference]: Without dead ends: 16247 [2021-06-05 03:49:06,974 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 80.6ms TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:49:06,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16247 states. [2021-06-05 03:49:07,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16247 to 14972. [2021-06-05 03:49:07,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14972 states, 14971 states have (on average 2.854652327833812) internal successors, (42737), 14971 states have internal predecessors, (42737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:07,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14972 states to 14972 states and 42737 transitions. [2021-06-05 03:49:07,168 INFO L78 Accepts]: Start accepts. Automaton has 14972 states and 42737 transitions. Word has length 35 [2021-06-05 03:49:07,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:49:07,168 INFO L482 AbstractCegarLoop]: Abstraction has 14972 states and 42737 transitions. [2021-06-05 03:49:07,169 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:07,169 INFO L276 IsEmpty]: Start isEmpty. Operand 14972 states and 42737 transitions. [2021-06-05 03:49:07,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 03:49:07,174 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:49:07,174 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:49:07,374 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:07,375 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:49:07,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:49:07,375 INFO L82 PathProgramCache]: Analyzing trace with hash -1965133284, now seen corresponding path program 19 times [2021-06-05 03:49:07,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:49:07,375 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933230126] [2021-06-05 03:49:07,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:49:07,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:07,415 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 19 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:49:07,415 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:49:07,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933230126] [2021-06-05 03:49:07,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933230126] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:07,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132647479] [2021-06-05 03:49:07,416 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:07,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:07,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 03:49:07,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:49:07,487 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 19 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:49:07,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132647479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:07,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:49:07,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-05 03:49:07,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699323888] [2021-06-05 03:49:07,487 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 03:49:07,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:49:07,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 03:49:07,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-06-05 03:49:07,488 INFO L87 Difference]: Start difference. First operand 14972 states and 42737 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:07,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:49:07,635 INFO L93 Difference]: Finished difference Result 15256 states and 43217 transitions. [2021-06-05 03:49:07,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 03:49:07,635 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 03:49:07,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:49:07,653 INFO L225 Difference]: With dead ends: 15256 [2021-06-05 03:49:07,654 INFO L226 Difference]: Without dead ends: 15235 [2021-06-05 03:49:07,654 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 52.4ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:49:07,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15235 states. [2021-06-05 03:49:07,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15235 to 14340. [2021-06-05 03:49:07,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14340 states, 14339 states have (on average 2.861078178394588) internal successors, (41025), 14339 states have internal predecessors, (41025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:07,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14340 states to 14340 states and 41025 transitions. [2021-06-05 03:49:07,842 INFO L78 Accepts]: Start accepts. Automaton has 14340 states and 41025 transitions. Word has length 35 [2021-06-05 03:49:07,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:49:07,842 INFO L482 AbstractCegarLoop]: Abstraction has 14340 states and 41025 transitions. [2021-06-05 03:49:07,842 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:07,842 INFO L276 IsEmpty]: Start isEmpty. Operand 14340 states and 41025 transitions. [2021-06-05 03:49:07,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 03:49:07,847 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:49:07,847 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:49:08,048 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-06-05 03:49:08,048 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:49:08,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:49:08,048 INFO L82 PathProgramCache]: Analyzing trace with hash -729647013, now seen corresponding path program 11 times [2021-06-05 03:49:08,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:49:08,048 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120912075] [2021-06-05 03:49:08,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:49:08,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:08,098 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 33 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:49:08,098 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:49:08,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120912075] [2021-06-05 03:49:08,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120912075] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:08,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718226503] [2021-06-05 03:49:08,099 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:08,123 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 03:49:08,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:49:08,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 03:49:08,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:49:08,171 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 34 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:49:08,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718226503] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:08,172 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:49:08,172 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-06-05 03:49:08,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914515935] [2021-06-05 03:49:08,172 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 03:49:08,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:49:08,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 03:49:08,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-05 03:49:08,172 INFO L87 Difference]: Start difference. First operand 14340 states and 41025 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:08,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:49:08,369 INFO L93 Difference]: Finished difference Result 15289 states and 42956 transitions. [2021-06-05 03:49:08,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 03:49:08,369 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 03:49:08,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:49:08,387 INFO L225 Difference]: With dead ends: 15289 [2021-06-05 03:49:08,387 INFO L226 Difference]: Without dead ends: 15273 [2021-06-05 03:49:08,388 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 61.4ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-05 03:49:08,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15273 states. [2021-06-05 03:49:08,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15273 to 14606. [2021-06-05 03:49:08,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14606 states, 14605 states have (on average 2.8478603218076) internal successors, (41593), 14605 states have internal predecessors, (41593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:08,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14606 states to 14606 states and 41593 transitions. [2021-06-05 03:49:08,650 INFO L78 Accepts]: Start accepts. Automaton has 14606 states and 41593 transitions. Word has length 35 [2021-06-05 03:49:08,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:49:08,650 INFO L482 AbstractCegarLoop]: Abstraction has 14606 states and 41593 transitions. [2021-06-05 03:49:08,650 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:08,650 INFO L276 IsEmpty]: Start isEmpty. Operand 14606 states and 41593 transitions. [2021-06-05 03:49:08,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 03:49:08,656 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:49:08,656 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:49:08,856 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:08,856 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:49:08,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:49:08,857 INFO L82 PathProgramCache]: Analyzing trace with hash 770685979, now seen corresponding path program 20 times [2021-06-05 03:49:08,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:49:08,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095835526] [2021-06-05 03:49:08,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:49:08,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:08,906 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:49:08,907 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:49:08,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095835526] [2021-06-05 03:49:08,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095835526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:08,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372498411] [2021-06-05 03:49:08,907 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:08,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:49:08,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:49:08,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 03:49:08,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:49:08,998 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 31 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:49:08,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372498411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:08,998 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:49:08,998 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-06-05 03:49:08,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462089152] [2021-06-05 03:49:08,999 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 03:49:08,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:49:08,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 03:49:08,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-05 03:49:08,999 INFO L87 Difference]: Start difference. First operand 14606 states and 41593 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:09,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:49:09,264 INFO L93 Difference]: Finished difference Result 14012 states and 39306 transitions. [2021-06-05 03:49:09,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 03:49:09,264 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 03:49:09,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:49:09,282 INFO L225 Difference]: With dead ends: 14012 [2021-06-05 03:49:09,282 INFO L226 Difference]: Without dead ends: 13783 [2021-06-05 03:49:09,282 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 64.8ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-05 03:49:09,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13783 states. [2021-06-05 03:49:09,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13783 to 13424. [2021-06-05 03:49:09,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13424 states, 13423 states have (on average 2.8016091782760935) internal successors, (37606), 13423 states have internal predecessors, (37606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:09,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13424 states to 13424 states and 37606 transitions. [2021-06-05 03:49:09,467 INFO L78 Accepts]: Start accepts. Automaton has 13424 states and 37606 transitions. Word has length 35 [2021-06-05 03:49:09,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:49:09,468 INFO L482 AbstractCegarLoop]: Abstraction has 13424 states and 37606 transitions. [2021-06-05 03:49:09,468 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:09,468 INFO L276 IsEmpty]: Start isEmpty. Operand 13424 states and 37606 transitions. [2021-06-05 03:49:09,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 03:49:09,472 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:49:09,472 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:49:09,673 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:09,673 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:49:09,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:49:09,673 INFO L82 PathProgramCache]: Analyzing trace with hash -1491207704, now seen corresponding path program 21 times [2021-06-05 03:49:09,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:49:09,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368590962] [2021-06-05 03:49:09,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:49:09,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:09,727 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 14 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:49:09,728 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:49:09,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368590962] [2021-06-05 03:49:09,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368590962] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:09,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266054887] [2021-06-05 03:49:09,728 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:09,753 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 03:49:09,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:49:09,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 03:49:09,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:49:09,798 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 14 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:49:09,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266054887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:09,798 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:49:09,798 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 03:49:09,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557899314] [2021-06-05 03:49:09,798 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 03:49:09,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:49:09,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 03:49:09,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-06-05 03:49:09,799 INFO L87 Difference]: Start difference. First operand 13424 states and 37606 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:09,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:49:09,927 INFO L93 Difference]: Finished difference Result 14007 states and 38649 transitions. [2021-06-05 03:49:09,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 03:49:09,927 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 03:49:09,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:49:09,944 INFO L225 Difference]: With dead ends: 14007 [2021-06-05 03:49:09,944 INFO L226 Difference]: Without dead ends: 13986 [2021-06-05 03:49:09,944 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 51.1ms TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-06-05 03:49:09,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13986 states. [2021-06-05 03:49:10,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13986 to 13395. [2021-06-05 03:49:10,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13395 states, 13394 states have (on average 2.7938629236971777) internal successors, (37421), 13394 states have internal predecessors, (37421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:10,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13395 states to 13395 states and 37421 transitions. [2021-06-05 03:49:10,117 INFO L78 Accepts]: Start accepts. Automaton has 13395 states and 37421 transitions. Word has length 35 [2021-06-05 03:49:10,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:49:10,117 INFO L482 AbstractCegarLoop]: Abstraction has 13395 states and 37421 transitions. [2021-06-05 03:49:10,117 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:10,117 INFO L276 IsEmpty]: Start isEmpty. Operand 13395 states and 37421 transitions. [2021-06-05 03:49:10,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 03:49:10,122 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:49:10,122 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:49:10,322 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:10,322 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:49:10,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:49:10,322 INFO L82 PathProgramCache]: Analyzing trace with hash -463341054, now seen corresponding path program 22 times [2021-06-05 03:49:10,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:49:10,323 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965792651] [2021-06-05 03:49:10,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:49:10,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:10,359 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 13 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:49:10,359 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:49:10,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965792651] [2021-06-05 03:49:10,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965792651] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:10,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316898351] [2021-06-05 03:49:10,360 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 03:49:10,405 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:49:10,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:49:10,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 03:49:10,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:10,450 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 13 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:49:10,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316898351] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:10,450 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:49:10,450 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-05 03:49:10,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351905724] [2021-06-05 03:49:10,450 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 03:49:10,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:49:10,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 03:49:10,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-06-05 03:49:10,451 INFO L87 Difference]: Start difference. First operand 13395 states and 37421 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:10,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:49:10,621 INFO L93 Difference]: Finished difference Result 13987 states and 38480 transitions. [2021-06-05 03:49:10,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 03:49:10,621 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 03:49:10,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:49:10,635 INFO L225 Difference]: With dead ends: 13987 [2021-06-05 03:49:10,635 INFO L226 Difference]: Without dead ends: 13963 [2021-06-05 03:49:10,636 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 56.3ms TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:49:10,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13963 states. [2021-06-05 03:49:10,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13963 to 12486. [2021-06-05 03:49:10,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12486 states, 12485 states have (on average 2.7947937525030038) internal successors, (34893), 12485 states have internal predecessors, (34893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:10,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12486 states to 12486 states and 34893 transitions. [2021-06-05 03:49:10,791 INFO L78 Accepts]: Start accepts. Automaton has 12486 states and 34893 transitions. Word has length 35 [2021-06-05 03:49:10,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:49:10,791 INFO L482 AbstractCegarLoop]: Abstraction has 12486 states and 34893 transitions. [2021-06-05 03:49:10,791 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:10,791 INFO L276 IsEmpty]: Start isEmpty. Operand 12486 states and 34893 transitions. [2021-06-05 03:49:10,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 03:49:10,795 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:49:10,795 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:49:10,995 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-06-05 03:49:10,995 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:49:10,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:49:10,996 INFO L82 PathProgramCache]: Analyzing trace with hash -1841063629, now seen corresponding path program 23 times [2021-06-05 03:49:10,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:49:10,996 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443436050] [2021-06-05 03:49:10,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:49:10,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:11,048 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:49:11,048 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:49:11,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443436050] [2021-06-05 03:49:11,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443436050] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:11,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114689557] [2021-06-05 03:49:11,048 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:11,083 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-05 03:49:11,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:49:11,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 03:49:11,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:49:11,129 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:49:11,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114689557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:11,129 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:49:11,129 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 03:49:11,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856994543] [2021-06-05 03:49:11,130 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 03:49:11,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:49:11,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 03:49:11,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-05 03:49:11,131 INFO L87 Difference]: Start difference. First operand 12486 states and 34893 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:11,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:49:11,391 INFO L93 Difference]: Finished difference Result 12918 states and 35022 transitions. [2021-06-05 03:49:11,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 03:49:11,391 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 03:49:11,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:49:11,405 INFO L225 Difference]: With dead ends: 12918 [2021-06-05 03:49:11,405 INFO L226 Difference]: Without dead ends: 12852 [2021-06-05 03:49:11,406 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 108.8ms TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-06-05 03:49:11,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12852 states. [2021-06-05 03:49:11,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12852 to 9736. [2021-06-05 03:49:11,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9736 states, 9735 states have (on average 2.787057010785824) internal successors, (27132), 9735 states have internal predecessors, (27132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:11,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9736 states to 9736 states and 27132 transitions. [2021-06-05 03:49:11,539 INFO L78 Accepts]: Start accepts. Automaton has 9736 states and 27132 transitions. Word has length 35 [2021-06-05 03:49:11,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:49:11,539 INFO L482 AbstractCegarLoop]: Abstraction has 9736 states and 27132 transitions. [2021-06-05 03:49:11,539 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:11,539 INFO L276 IsEmpty]: Start isEmpty. Operand 9736 states and 27132 transitions. [2021-06-05 03:49:11,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 03:49:11,542 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:49:11,542 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:49:11,743 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:11,743 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:49:11,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:49:11,743 INFO L82 PathProgramCache]: Analyzing trace with hash -1454460952, now seen corresponding path program 24 times [2021-06-05 03:49:11,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:49:11,743 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602513400] [2021-06-05 03:49:11,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:49:11,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:11,792 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 18 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:49:11,793 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:49:11,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602513400] [2021-06-05 03:49:11,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602513400] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:11,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065497016] [2021-06-05 03:49:11,793 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:11,816 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 03:49:11,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:49:11,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 03:49:11,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:49:11,862 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 18 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:49:11,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065497016] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:11,862 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:49:11,862 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 03:49:11,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060526304] [2021-06-05 03:49:11,862 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 03:49:11,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:49:11,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 03:49:11,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-05 03:49:11,863 INFO L87 Difference]: Start difference. First operand 9736 states and 27132 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:12,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:49:12,021 INFO L93 Difference]: Finished difference Result 10128 states and 27807 transitions. [2021-06-05 03:49:12,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 03:49:12,022 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 03:49:12,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:49:12,032 INFO L225 Difference]: With dead ends: 10128 [2021-06-05 03:49:12,032 INFO L226 Difference]: Without dead ends: 10101 [2021-06-05 03:49:12,032 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 76.1ms TimeCoverageRelationStatistics Valid=76, Invalid=134, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:49:12,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10101 states. [2021-06-05 03:49:12,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10101 to 9757. [2021-06-05 03:49:12,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9757 states, 9756 states have (on average 2.7809553095530957) internal successors, (27131), 9756 states have internal predecessors, (27131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:12,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9757 states to 9757 states and 27131 transitions. [2021-06-05 03:49:12,140 INFO L78 Accepts]: Start accepts. Automaton has 9757 states and 27131 transitions. Word has length 35 [2021-06-05 03:49:12,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:49:12,140 INFO L482 AbstractCegarLoop]: Abstraction has 9757 states and 27131 transitions. [2021-06-05 03:49:12,140 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:12,140 INFO L276 IsEmpty]: Start isEmpty. Operand 9757 states and 27131 transitions. [2021-06-05 03:49:12,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 03:49:12,144 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:49:12,144 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:49:12,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable161 [2021-06-05 03:49:12,345 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:49:12,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:49:12,345 INFO L82 PathProgramCache]: Analyzing trace with hash -208710795, now seen corresponding path program 12 times [2021-06-05 03:49:12,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:49:12,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281497637] [2021-06-05 03:49:12,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:49:12,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:12,395 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:49:12,395 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:49:12,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281497637] [2021-06-05 03:49:12,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281497637] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:12,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878040488] [2021-06-05 03:49:12,395 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:12,419 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 03:49:12,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:49:12,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 03:49:12,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:49:12,469 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:49:12,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878040488] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:12,469 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:49:12,469 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 03:49:12,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564559510] [2021-06-05 03:49:12,470 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 03:49:12,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:49:12,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 03:49:12,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-05 03:49:12,470 INFO L87 Difference]: Start difference. First operand 9757 states and 27131 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:12,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:49:12,682 INFO L93 Difference]: Finished difference Result 10449 states and 28483 transitions. [2021-06-05 03:49:12,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 03:49:12,682 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 03:49:12,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:49:12,693 INFO L225 Difference]: With dead ends: 10449 [2021-06-05 03:49:12,693 INFO L226 Difference]: Without dead ends: 10431 [2021-06-05 03:49:12,693 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 103.0ms TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-06-05 03:49:12,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10431 states. [2021-06-05 03:49:12,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10431 to 9155. [2021-06-05 03:49:12,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9155 states, 9154 states have (on average 2.7968101376447456) internal successors, (25602), 9154 states have internal predecessors, (25602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:12,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9155 states to 9155 states and 25602 transitions. [2021-06-05 03:49:12,817 INFO L78 Accepts]: Start accepts. Automaton has 9155 states and 25602 transitions. Word has length 35 [2021-06-05 03:49:12,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:49:12,818 INFO L482 AbstractCegarLoop]: Abstraction has 9155 states and 25602 transitions. [2021-06-05 03:49:12,818 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:12,818 INFO L276 IsEmpty]: Start isEmpty. Operand 9155 states and 25602 transitions. [2021-06-05 03:49:12,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 03:49:12,821 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:49:12,821 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:49:13,021 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2021-06-05 03:49:13,022 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:49:13,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:49:13,022 INFO L82 PathProgramCache]: Analyzing trace with hash -305893054, now seen corresponding path program 25 times [2021-06-05 03:49:13,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:49:13,022 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113083754] [2021-06-05 03:49:13,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:49:13,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:13,031 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-06-05 03:49:13,031 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:49:13,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113083754] [2021-06-05 03:49:13,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113083754] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 03:49:13,031 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 03:49:13,031 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 03:49:13,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119855010] [2021-06-05 03:49:13,031 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 03:49:13,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:49:13,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 03:49:13,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 03:49:13,031 INFO L87 Difference]: Start difference. First operand 9155 states and 25602 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:13,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:49:13,039 INFO L93 Difference]: Finished difference Result 2349 states and 5506 transitions. [2021-06-05 03:49:13,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 03:49:13,039 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 03:49:13,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:49:13,041 INFO L225 Difference]: With dead ends: 2349 [2021-06-05 03:49:13,041 INFO L226 Difference]: Without dead ends: 2331 [2021-06-05 03:49:13,042 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 03:49:13,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2331 states. [2021-06-05 03:49:13,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2331 to 1380. [2021-06-05 03:49:13,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1380 states, 1379 states have (on average 2.3343002175489485) internal successors, (3219), 1379 states have internal predecessors, (3219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:13,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1380 states to 1380 states and 3219 transitions. [2021-06-05 03:49:13,055 INFO L78 Accepts]: Start accepts. Automaton has 1380 states and 3219 transitions. Word has length 35 [2021-06-05 03:49:13,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:49:13,056 INFO L482 AbstractCegarLoop]: Abstraction has 1380 states and 3219 transitions. [2021-06-05 03:49:13,056 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:13,056 INFO L276 IsEmpty]: Start isEmpty. Operand 1380 states and 3219 transitions. [2021-06-05 03:49:13,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 03:49:13,057 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:49:13,057 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:49:13,057 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2021-06-05 03:49:13,057 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:49:13,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:49:13,057 INFO L82 PathProgramCache]: Analyzing trace with hash -385601739, now seen corresponding path program 26 times [2021-06-05 03:49:13,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:49:13,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077024672] [2021-06-05 03:49:13,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:49:13,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:13,128 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 10 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:49:13,129 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:49:13,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077024672] [2021-06-05 03:49:13,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077024672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:13,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645939213] [2021-06-05 03:49:13,129 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:13,154 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:49:13,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:49:13,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 03:49:13,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:49:13,247 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:49:13,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645939213] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:13,248 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:49:13,248 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 03:49:13,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677545816] [2021-06-05 03:49:13,248 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 03:49:13,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:49:13,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 03:49:13,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:49:13,248 INFO L87 Difference]: Start difference. First operand 1380 states and 3219 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:13,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:49:13,425 INFO L93 Difference]: Finished difference Result 1429 states and 3294 transitions. [2021-06-05 03:49:13,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 03:49:13,426 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 03:49:13,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:49:13,427 INFO L225 Difference]: With dead ends: 1429 [2021-06-05 03:49:13,427 INFO L226 Difference]: Without dead ends: 1397 [2021-06-05 03:49:13,427 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 75.9ms TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:49:13,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1397 states. [2021-06-05 03:49:13,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1397 to 1380. [2021-06-05 03:49:13,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1380 states, 1379 states have (on average 2.3299492385786804) internal successors, (3213), 1379 states have internal predecessors, (3213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:13,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1380 states to 1380 states and 3213 transitions. [2021-06-05 03:49:13,437 INFO L78 Accepts]: Start accepts. Automaton has 1380 states and 3213 transitions. Word has length 35 [2021-06-05 03:49:13,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:49:13,437 INFO L482 AbstractCegarLoop]: Abstraction has 1380 states and 3213 transitions. [2021-06-05 03:49:13,437 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:13,437 INFO L276 IsEmpty]: Start isEmpty. Operand 1380 states and 3213 transitions. [2021-06-05 03:49:13,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 03:49:13,438 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:49:13,438 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:49:13,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2021-06-05 03:49:13,641 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:49:13,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:49:13,641 INFO L82 PathProgramCache]: Analyzing trace with hash 1551170986, now seen corresponding path program 27 times [2021-06-05 03:49:13,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:49:13,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113201681] [2021-06-05 03:49:13,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:49:13,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:13,687 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:49:13,688 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:49:13,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113201681] [2021-06-05 03:49:13,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113201681] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:13,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040882513] [2021-06-05 03:49:13,688 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:13,712 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 03:49:13,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:49:13,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 03:49:13,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:49:13,761 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:49:13,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040882513] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:13,761 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:49:13,761 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-05 03:49:13,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825294151] [2021-06-05 03:49:13,762 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 03:49:13,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:49:13,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 03:49:13,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-06-05 03:49:13,762 INFO L87 Difference]: Start difference. First operand 1380 states and 3213 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:13,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:49:13,886 INFO L93 Difference]: Finished difference Result 2071 states and 4706 transitions. [2021-06-05 03:49:13,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 03:49:13,886 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 03:49:13,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:49:13,888 INFO L225 Difference]: With dead ends: 2071 [2021-06-05 03:49:13,888 INFO L226 Difference]: Without dead ends: 2071 [2021-06-05 03:49:13,888 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 54.8ms TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:49:13,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2071 states. [2021-06-05 03:49:13,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2071 to 1527. [2021-06-05 03:49:13,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1527 states, 1526 states have (on average 2.4023591087811274) internal successors, (3666), 1526 states have internal predecessors, (3666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:13,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1527 states to 1527 states and 3666 transitions. [2021-06-05 03:49:13,901 INFO L78 Accepts]: Start accepts. Automaton has 1527 states and 3666 transitions. Word has length 35 [2021-06-05 03:49:13,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:49:13,901 INFO L482 AbstractCegarLoop]: Abstraction has 1527 states and 3666 transitions. [2021-06-05 03:49:13,901 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:13,901 INFO L276 IsEmpty]: Start isEmpty. Operand 1527 states and 3666 transitions. [2021-06-05 03:49:13,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 03:49:13,902 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:49:13,902 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:49:14,102 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:14,103 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:49:14,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:49:14,103 INFO L82 PathProgramCache]: Analyzing trace with hash 780335319, now seen corresponding path program 13 times [2021-06-05 03:49:14,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:49:14,103 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431042547] [2021-06-05 03:49:14,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:49:14,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:14,148 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:49:14,148 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:49:14,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431042547] [2021-06-05 03:49:14,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431042547] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:14,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841641252] [2021-06-05 03:49:14,149 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:14,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:14,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 03:49:14,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:49:14,220 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:49:14,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841641252] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:14,220 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:49:14,220 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 03:49:14,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082777381] [2021-06-05 03:49:14,220 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 03:49:14,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:49:14,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 03:49:14,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-06-05 03:49:14,221 INFO L87 Difference]: Start difference. First operand 1527 states and 3666 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:14,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:49:14,404 INFO L93 Difference]: Finished difference Result 1909 states and 4411 transitions. [2021-06-05 03:49:14,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 03:49:14,405 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 03:49:14,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:49:14,406 INFO L225 Difference]: With dead ends: 1909 [2021-06-05 03:49:14,406 INFO L226 Difference]: Without dead ends: 1905 [2021-06-05 03:49:14,406 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 78.0ms TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:49:14,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1905 states. [2021-06-05 03:49:14,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1905 to 1526. [2021-06-05 03:49:14,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1526 states, 1525 states have (on average 2.40327868852459) internal successors, (3665), 1525 states have internal predecessors, (3665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:14,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1526 states to 1526 states and 3665 transitions. [2021-06-05 03:49:14,419 INFO L78 Accepts]: Start accepts. Automaton has 1526 states and 3665 transitions. Word has length 35 [2021-06-05 03:49:14,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:49:14,419 INFO L482 AbstractCegarLoop]: Abstraction has 1526 states and 3665 transitions. [2021-06-05 03:49:14,419 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:14,419 INFO L276 IsEmpty]: Start isEmpty. Operand 1526 states and 3665 transitions. [2021-06-05 03:49:14,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 03:49:14,420 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:49:14,420 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:49:14,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:14,620 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:49:14,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:49:14,621 INFO L82 PathProgramCache]: Analyzing trace with hash -852961065, now seen corresponding path program 28 times [2021-06-05 03:49:14,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:49:14,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886672157] [2021-06-05 03:49:14,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:49:14,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:14,674 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 10 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:49:14,674 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:49:14,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886672157] [2021-06-05 03:49:14,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886672157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:14,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604320245] [2021-06-05 03:49:14,674 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:14,706 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:49:14,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:49:14,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 03:49:14,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:49:14,798 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:49:14,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604320245] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:14,798 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:49:14,798 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 03:49:14,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038385038] [2021-06-05 03:49:14,798 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 03:49:14,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:49:14,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 03:49:14,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-05 03:49:14,799 INFO L87 Difference]: Start difference. First operand 1526 states and 3665 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:14,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:49:14,944 INFO L93 Difference]: Finished difference Result 1563 states and 3719 transitions. [2021-06-05 03:49:14,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 03:49:14,945 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 03:49:14,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:49:14,946 INFO L225 Difference]: With dead ends: 1563 [2021-06-05 03:49:14,946 INFO L226 Difference]: Without dead ends: 1543 [2021-06-05 03:49:14,946 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 57.4ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-05 03:49:14,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1543 states. [2021-06-05 03:49:14,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1543 to 1526. [2021-06-05 03:49:14,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1526 states, 1525 states have (on average 2.401311475409836) internal successors, (3662), 1525 states have internal predecessors, (3662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:14,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1526 states to 1526 states and 3662 transitions. [2021-06-05 03:49:14,958 INFO L78 Accepts]: Start accepts. Automaton has 1526 states and 3662 transitions. Word has length 35 [2021-06-05 03:49:14,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:49:14,958 INFO L482 AbstractCegarLoop]: Abstraction has 1526 states and 3662 transitions. [2021-06-05 03:49:14,958 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:14,959 INFO L276 IsEmpty]: Start isEmpty. Operand 1526 states and 3662 transitions. [2021-06-05 03:49:14,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 03:49:14,960 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:49:14,960 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:49:15,175 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable171 [2021-06-05 03:49:15,176 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:49:15,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:49:15,176 INFO L82 PathProgramCache]: Analyzing trace with hash -1273583998, now seen corresponding path program 29 times [2021-06-05 03:49:15,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:49:15,176 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852290533] [2021-06-05 03:49:15,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:49:15,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:15,210 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:49:15,210 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:49:15,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852290533] [2021-06-05 03:49:15,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852290533] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:15,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930945634] [2021-06-05 03:49:15,210 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:15,240 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 03:49:15,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:49:15,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 03:49:15,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:49:15,292 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 18 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:49:15,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930945634] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:15,292 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:49:15,293 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 9 [2021-06-05 03:49:15,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613556565] [2021-06-05 03:49:15,293 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 03:49:15,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:49:15,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 03:49:15,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 03:49:15,293 INFO L87 Difference]: Start difference. First operand 1526 states and 3662 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:15,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:49:15,403 INFO L93 Difference]: Finished difference Result 2415 states and 5508 transitions. [2021-06-05 03:49:15,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 03:49:15,403 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 03:49:15,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:49:15,405 INFO L225 Difference]: With dead ends: 2415 [2021-06-05 03:49:15,405 INFO L226 Difference]: Without dead ends: 2415 [2021-06-05 03:49:15,405 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 41.0ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-06-05 03:49:15,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2415 states. [2021-06-05 03:49:15,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2415 to 1653. [2021-06-05 03:49:15,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1653 states, 1652 states have (on average 2.4473365617433416) internal successors, (4043), 1652 states have internal predecessors, (4043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:15,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1653 states to 1653 states and 4043 transitions. [2021-06-05 03:49:15,420 INFO L78 Accepts]: Start accepts. Automaton has 1653 states and 4043 transitions. Word has length 35 [2021-06-05 03:49:15,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:49:15,421 INFO L482 AbstractCegarLoop]: Abstraction has 1653 states and 4043 transitions. [2021-06-05 03:49:15,421 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:15,421 INFO L276 IsEmpty]: Start isEmpty. Operand 1653 states and 4043 transitions. [2021-06-05 03:49:15,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 03:49:15,422 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:49:15,422 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:49:15,622 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:15,622 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:49:15,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:49:15,623 INFO L82 PathProgramCache]: Analyzing trace with hash -1511645515, now seen corresponding path program 14 times [2021-06-05 03:49:15,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:49:15,623 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001457991] [2021-06-05 03:49:15,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:49:15,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:15,673 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:49:15,673 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:49:15,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001457991] [2021-06-05 03:49:15,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001457991] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:15,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744179545] [2021-06-05 03:49:15,674 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:15,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:49:15,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:49:15,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 03:49:15,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:49:15,745 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:49:15,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744179545] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:15,745 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:49:15,745 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-06-05 03:49:15,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106200804] [2021-06-05 03:49:15,746 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 03:49:15,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:49:15,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 03:49:15,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-05 03:49:15,746 INFO L87 Difference]: Start difference. First operand 1653 states and 4043 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:15,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:49:15,959 INFO L93 Difference]: Finished difference Result 2638 states and 6132 transitions. [2021-06-05 03:49:15,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 03:49:15,959 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 03:49:15,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:49:15,961 INFO L225 Difference]: With dead ends: 2638 [2021-06-05 03:49:15,961 INFO L226 Difference]: Without dead ends: 2596 [2021-06-05 03:49:15,961 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 66.7ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:49:15,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2596 states. [2021-06-05 03:49:15,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2596 to 1819. [2021-06-05 03:49:15,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1819 states, 1818 states have (on average 2.4592959295929595) internal successors, (4471), 1818 states have internal predecessors, (4471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:15,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1819 states to 1819 states and 4471 transitions. [2021-06-05 03:49:15,978 INFO L78 Accepts]: Start accepts. Automaton has 1819 states and 4471 transitions. Word has length 35 [2021-06-05 03:49:15,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:49:15,978 INFO L482 AbstractCegarLoop]: Abstraction has 1819 states and 4471 transitions. [2021-06-05 03:49:15,978 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:15,978 INFO L276 IsEmpty]: Start isEmpty. Operand 1819 states and 4471 transitions. [2021-06-05 03:49:15,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 03:49:15,980 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:49:15,980 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:49:16,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,94 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:16,180 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:49:16,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:49:16,180 INFO L82 PathProgramCache]: Analyzing trace with hash 1229624924, now seen corresponding path program 30 times [2021-06-05 03:49:16,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:49:16,180 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890429462] [2021-06-05 03:49:16,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:49:16,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:16,214 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 24 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:49:16,214 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:49:16,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890429462] [2021-06-05 03:49:16,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890429462] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:16,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017296506] [2021-06-05 03:49:16,215 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:16,238 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 03:49:16,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:49:16,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 03:49:16,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:49:16,286 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 24 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:49:16,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017296506] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:16,286 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:49:16,286 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 03:49:16,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237923793] [2021-06-05 03:49:16,286 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 03:49:16,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:49:16,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 03:49:16,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-06-05 03:49:16,286 INFO L87 Difference]: Start difference. First operand 1819 states and 4471 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:16,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:49:16,367 INFO L93 Difference]: Finished difference Result 2408 states and 5562 transitions. [2021-06-05 03:49:16,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 03:49:16,367 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 03:49:16,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:49:16,369 INFO L225 Difference]: With dead ends: 2408 [2021-06-05 03:49:16,369 INFO L226 Difference]: Without dead ends: 2405 [2021-06-05 03:49:16,369 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 31.7ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-06-05 03:49:16,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2405 states. [2021-06-05 03:49:16,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2405 to 1818. [2021-06-05 03:49:16,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1818 states, 1817 states have (on average 2.45789763346175) internal successors, (4466), 1817 states have internal predecessors, (4466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:16,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1818 states to 1818 states and 4466 transitions. [2021-06-05 03:49:16,385 INFO L78 Accepts]: Start accepts. Automaton has 1818 states and 4466 transitions. Word has length 35 [2021-06-05 03:49:16,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:49:16,385 INFO L482 AbstractCegarLoop]: Abstraction has 1818 states and 4466 transitions. [2021-06-05 03:49:16,386 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:16,386 INFO L276 IsEmpty]: Start isEmpty. Operand 1818 states and 4466 transitions. [2021-06-05 03:49:16,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 03:49:16,387 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:49:16,387 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:49:16,587 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:16,587 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:49:16,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:49:16,588 INFO L82 PathProgramCache]: Analyzing trace with hash 1436687490, now seen corresponding path program 31 times [2021-06-05 03:49:16,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:49:16,588 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811052481] [2021-06-05 03:49:16,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:49:16,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:16,622 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 20 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:49:16,622 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:49:16,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811052481] [2021-06-05 03:49:16,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811052481] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:16,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023447716] [2021-06-05 03:49:16,622 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:16,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:16,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 03:49:16,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:49:16,699 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 20 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:49:16,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023447716] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:16,699 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:49:16,699 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 03:49:16,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846582348] [2021-06-05 03:49:16,699 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 03:49:16,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:49:16,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 03:49:16,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-06-05 03:49:16,700 INFO L87 Difference]: Start difference. First operand 1818 states and 4466 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:16,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:49:16,777 INFO L93 Difference]: Finished difference Result 2608 states and 6106 transitions. [2021-06-05 03:49:16,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 03:49:16,778 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 03:49:16,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:49:16,780 INFO L225 Difference]: With dead ends: 2608 [2021-06-05 03:49:16,780 INFO L226 Difference]: Without dead ends: 2596 [2021-06-05 03:49:16,780 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 38.9ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-06-05 03:49:16,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2596 states. [2021-06-05 03:49:16,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2596 to 1953. [2021-06-05 03:49:16,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1953 states, 1952 states have (on average 2.4574795081967213) internal successors, (4797), 1952 states have internal predecessors, (4797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:16,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1953 states to 1953 states and 4797 transitions. [2021-06-05 03:49:16,798 INFO L78 Accepts]: Start accepts. Automaton has 1953 states and 4797 transitions. Word has length 35 [2021-06-05 03:49:16,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:49:16,798 INFO L482 AbstractCegarLoop]: Abstraction has 1953 states and 4797 transitions. [2021-06-05 03:49:16,798 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:16,798 INFO L276 IsEmpty]: Start isEmpty. Operand 1953 states and 4797 transitions. [2021-06-05 03:49:16,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 03:49:16,799 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:49:16,799 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:49:17,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:17,000 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:49:17,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:49:17,000 INFO L82 PathProgramCache]: Analyzing trace with hash -11312523, now seen corresponding path program 32 times [2021-06-05 03:49:17,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:49:17,000 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145295680] [2021-06-05 03:49:17,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:49:17,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:17,047 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 11 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:49:17,047 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:49:17,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145295680] [2021-06-05 03:49:17,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145295680] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:17,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559308670] [2021-06-05 03:49:17,048 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:17,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:49:17,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:49:17,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 03:49:17,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:49:17,128 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:49:17,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559308670] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:17,129 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:49:17,129 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-06-05 03:49:17,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086409233] [2021-06-05 03:49:17,129 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 03:49:17,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:49:17,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 03:49:17,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-05 03:49:17,129 INFO L87 Difference]: Start difference. First operand 1953 states and 4797 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:17,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:49:17,333 INFO L93 Difference]: Finished difference Result 2377 states and 5580 transitions. [2021-06-05 03:49:17,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 03:49:17,333 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 03:49:17,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:49:17,336 INFO L225 Difference]: With dead ends: 2377 [2021-06-05 03:49:17,336 INFO L226 Difference]: Without dead ends: 2298 [2021-06-05 03:49:17,336 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 59.0ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-05 03:49:17,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2298 states. [2021-06-05 03:49:17,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2298 to 2023. [2021-06-05 03:49:17,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2023 states, 2022 states have (on average 2.4416419386745796) internal successors, (4937), 2022 states have internal predecessors, (4937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:17,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2023 states to 2023 states and 4937 transitions. [2021-06-05 03:49:17,353 INFO L78 Accepts]: Start accepts. Automaton has 2023 states and 4937 transitions. Word has length 35 [2021-06-05 03:49:17,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:49:17,353 INFO L482 AbstractCegarLoop]: Abstraction has 2023 states and 4937 transitions. [2021-06-05 03:49:17,353 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:17,353 INFO L276 IsEmpty]: Start isEmpty. Operand 2023 states and 4937 transitions. [2021-06-05 03:49:17,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 03:49:17,354 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:49:17,354 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:49:17,555 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-06-05 03:49:17,555 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:49:17,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:49:17,555 INFO L82 PathProgramCache]: Analyzing trace with hash -624848703, now seen corresponding path program 33 times [2021-06-05 03:49:17,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:49:17,555 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550225846] [2021-06-05 03:49:17,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:49:17,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:17,601 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 29 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:49:17,601 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:49:17,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550225846] [2021-06-05 03:49:17,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550225846] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:17,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125154599] [2021-06-05 03:49:17,601 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:17,626 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 03:49:17,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:49:17,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 03:49:17,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:49:17,672 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:49:17,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125154599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:17,672 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:49:17,672 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-06-05 03:49:17,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988163274] [2021-06-05 03:49:17,673 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 03:49:17,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:49:17,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 03:49:17,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-05 03:49:17,673 INFO L87 Difference]: Start difference. First operand 2023 states and 4937 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:17,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:49:17,805 INFO L93 Difference]: Finished difference Result 2392 states and 5647 transitions. [2021-06-05 03:49:17,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 03:49:17,805 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 03:49:17,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:49:17,807 INFO L225 Difference]: With dead ends: 2392 [2021-06-05 03:49:17,807 INFO L226 Difference]: Without dead ends: 2380 [2021-06-05 03:49:17,807 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 60.2ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-05 03:49:17,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2380 states. [2021-06-05 03:49:17,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2380 to 2025. [2021-06-05 03:49:17,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2025 states, 2024 states have (on average 2.441205533596838) internal successors, (4941), 2024 states have internal predecessors, (4941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:17,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2025 states to 2025 states and 4941 transitions. [2021-06-05 03:49:17,825 INFO L78 Accepts]: Start accepts. Automaton has 2025 states and 4941 transitions. Word has length 35 [2021-06-05 03:49:17,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:49:17,825 INFO L482 AbstractCegarLoop]: Abstraction has 2025 states and 4941 transitions. [2021-06-05 03:49:17,825 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:17,825 INFO L276 IsEmpty]: Start isEmpty. Operand 2025 states and 4941 transitions. [2021-06-05 03:49:17,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 03:49:17,826 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:49:17,826 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:49:18,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:18,037 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:49:18,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:49:18,037 INFO L82 PathProgramCache]: Analyzing trace with hash 1517068631, now seen corresponding path program 34 times [2021-06-05 03:49:18,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:49:18,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962972063] [2021-06-05 03:49:18,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:49:18,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:18,100 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:49:18,100 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:49:18,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962972063] [2021-06-05 03:49:18,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962972063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:18,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574372574] [2021-06-05 03:49:18,101 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:18,127 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:49:18,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:49:18,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 03:49:18,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:49:18,174 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:49:18,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574372574] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:18,174 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:49:18,174 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 03:49:18,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829071938] [2021-06-05 03:49:18,174 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 03:49:18,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:49:18,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 03:49:18,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-06-05 03:49:18,174 INFO L87 Difference]: Start difference. First operand 2025 states and 4941 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:18,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:49:18,429 INFO L93 Difference]: Finished difference Result 3056 states and 7043 transitions. [2021-06-05 03:49:18,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 03:49:18,430 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 03:49:18,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:49:18,433 INFO L225 Difference]: With dead ends: 3056 [2021-06-05 03:49:18,433 INFO L226 Difference]: Without dead ends: 3002 [2021-06-05 03:49:18,433 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 122.6ms TimeCoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:49:18,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3002 states. [2021-06-05 03:49:18,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3002 to 2084. [2021-06-05 03:49:18,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2084 states, 2083 states have (on average 2.4459913586173787) internal successors, (5095), 2083 states have internal predecessors, (5095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:18,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2084 states to 2084 states and 5095 transitions. [2021-06-05 03:49:18,453 INFO L78 Accepts]: Start accepts. Automaton has 2084 states and 5095 transitions. Word has length 35 [2021-06-05 03:49:18,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:49:18,453 INFO L482 AbstractCegarLoop]: Abstraction has 2084 states and 5095 transitions. [2021-06-05 03:49:18,453 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:18,453 INFO L276 IsEmpty]: Start isEmpty. Operand 2084 states and 5095 transitions. [2021-06-05 03:49:18,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 03:49:18,455 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:49:18,455 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:49:18,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:18,669 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:49:18,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:49:18,669 INFO L82 PathProgramCache]: Analyzing trace with hash -1245339556, now seen corresponding path program 35 times [2021-06-05 03:49:18,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:49:18,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65382100] [2021-06-05 03:49:18,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:49:18,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:18,709 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 15 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:49:18,709 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:49:18,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65382100] [2021-06-05 03:49:18,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65382100] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:18,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044460670] [2021-06-05 03:49:18,710 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:18,734 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 03:49:18,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:49:18,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 03:49:18,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:49:18,788 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 16 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:49:18,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044460670] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:18,788 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:49:18,788 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 10 [2021-06-05 03:49:18,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071960537] [2021-06-05 03:49:18,788 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 03:49:18,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:49:18,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 03:49:18,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 03:49:18,789 INFO L87 Difference]: Start difference. First operand 2084 states and 5095 transitions. Second operand has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:18,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:49:18,913 INFO L93 Difference]: Finished difference Result 2889 states and 6691 transitions. [2021-06-05 03:49:18,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 03:49:18,913 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 03:49:18,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:49:18,915 INFO L225 Difference]: With dead ends: 2889 [2021-06-05 03:49:18,915 INFO L226 Difference]: Without dead ends: 2865 [2021-06-05 03:49:18,915 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 56.8ms TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:49:18,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2865 states. [2021-06-05 03:49:18,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2865 to 2164. [2021-06-05 03:49:18,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2164 states, 2163 states have (on average 2.4678687008784097) internal successors, (5338), 2163 states have internal predecessors, (5338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:18,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2164 states to 2164 states and 5338 transitions. [2021-06-05 03:49:18,935 INFO L78 Accepts]: Start accepts. Automaton has 2164 states and 5338 transitions. Word has length 35 [2021-06-05 03:49:18,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:49:18,935 INFO L482 AbstractCegarLoop]: Abstraction has 2164 states and 5338 transitions. [2021-06-05 03:49:18,935 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:18,935 INFO L276 IsEmpty]: Start isEmpty. Operand 2164 states and 5338 transitions. [2021-06-05 03:49:18,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 03:49:18,936 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:49:18,936 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:49:19,137 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable182 [2021-06-05 03:49:19,137 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:49:19,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:49:19,137 INFO L82 PathProgramCache]: Analyzing trace with hash 1671905165, now seen corresponding path program 36 times [2021-06-05 03:49:19,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:49:19,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246703771] [2021-06-05 03:49:19,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:49:19,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:19,187 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:49:19,187 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:49:19,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246703771] [2021-06-05 03:49:19,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246703771] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:19,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745839033] [2021-06-05 03:49:19,187 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:19,211 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 03:49:19,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:49:19,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 03:49:19,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:49:19,258 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:49:19,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745839033] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:19,258 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:49:19,258 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 03:49:19,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275561583] [2021-06-05 03:49:19,259 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 03:49:19,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:49:19,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 03:49:19,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-05 03:49:19,259 INFO L87 Difference]: Start difference. First operand 2164 states and 5338 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:19,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:49:19,631 INFO L93 Difference]: Finished difference Result 3794 states and 8733 transitions. [2021-06-05 03:49:19,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 03:49:19,631 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 03:49:19,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:49:19,635 INFO L225 Difference]: With dead ends: 3794 [2021-06-05 03:49:19,635 INFO L226 Difference]: Without dead ends: 3680 [2021-06-05 03:49:19,635 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 205.8ms TimeCoverageRelationStatistics Valid=159, Invalid=771, Unknown=0, NotChecked=0, Total=930 [2021-06-05 03:49:19,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3680 states. [2021-06-05 03:49:19,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3680 to 2276. [2021-06-05 03:49:19,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2276 states, 2275 states have (on average 2.474285714285714) internal successors, (5629), 2275 states have internal predecessors, (5629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:19,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2276 states to 2276 states and 5629 transitions. [2021-06-05 03:49:19,658 INFO L78 Accepts]: Start accepts. Automaton has 2276 states and 5629 transitions. Word has length 35 [2021-06-05 03:49:19,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:49:19,658 INFO L482 AbstractCegarLoop]: Abstraction has 2276 states and 5629 transitions. [2021-06-05 03:49:19,659 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:19,659 INFO L276 IsEmpty]: Start isEmpty. Operand 2276 states and 5629 transitions. [2021-06-05 03:49:19,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 03:49:19,660 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:49:19,660 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:49:19,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:19,861 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:49:19,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:49:19,861 INFO L82 PathProgramCache]: Analyzing trace with hash 2058507842, now seen corresponding path program 37 times [2021-06-05 03:49:19,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:49:19,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236329615] [2021-06-05 03:49:19,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:49:19,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:19,910 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 16 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:49:19,910 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:49:19,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236329615] [2021-06-05 03:49:19,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236329615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:19,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210522855] [2021-06-05 03:49:19,910 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:19,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:19,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 03:49:19,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:49:19,980 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 16 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:49:19,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210522855] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:19,980 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:49:19,980 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 03:49:19,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490210623] [2021-06-05 03:49:19,980 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 03:49:19,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:49:19,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 03:49:19,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-05 03:49:19,981 INFO L87 Difference]: Start difference. First operand 2276 states and 5629 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:20,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:49:20,081 INFO L93 Difference]: Finished difference Result 2985 states and 6922 transitions. [2021-06-05 03:49:20,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 03:49:20,081 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 03:49:20,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:49:20,083 INFO L225 Difference]: With dead ends: 2985 [2021-06-05 03:49:20,083 INFO L226 Difference]: Without dead ends: 2949 [2021-06-05 03:49:20,084 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 62.1ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:49:20,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2949 states. [2021-06-05 03:49:20,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2949 to 2276. [2021-06-05 03:49:20,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2276 states, 2275 states have (on average 2.4725274725274726) internal successors, (5625), 2275 states have internal predecessors, (5625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:20,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2276 states to 2276 states and 5625 transitions. [2021-06-05 03:49:20,106 INFO L78 Accepts]: Start accepts. Automaton has 2276 states and 5625 transitions. Word has length 35 [2021-06-05 03:49:20,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:49:20,106 INFO L482 AbstractCegarLoop]: Abstraction has 2276 states and 5625 transitions. [2021-06-05 03:49:20,106 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:20,106 INFO L276 IsEmpty]: Start isEmpty. Operand 2276 states and 5625 transitions. [2021-06-05 03:49:20,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 03:49:20,108 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:49:20,108 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:49:20,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,102 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:20,321 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:49:20,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:49:20,321 INFO L82 PathProgramCache]: Analyzing trace with hash 1612213655, now seen corresponding path program 38 times [2021-06-05 03:49:20,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:49:20,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934861514] [2021-06-05 03:49:20,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:49:20,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:20,379 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:49:20,379 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:49:20,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934861514] [2021-06-05 03:49:20,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934861514] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:20,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651105788] [2021-06-05 03:49:20,379 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:20,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:49:20,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:49:20,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 03:49:20,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:49:20,449 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:49:20,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651105788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:20,450 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:49:20,450 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 03:49:20,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445753290] [2021-06-05 03:49:20,450 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 03:49:20,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:49:20,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 03:49:20,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-05 03:49:20,450 INFO L87 Difference]: Start difference. First operand 2276 states and 5625 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:20,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:49:20,685 INFO L93 Difference]: Finished difference Result 3037 states and 7074 transitions. [2021-06-05 03:49:20,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 03:49:20,686 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 03:49:20,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:49:20,688 INFO L225 Difference]: With dead ends: 3037 [2021-06-05 03:49:20,688 INFO L226 Difference]: Without dead ends: 2881 [2021-06-05 03:49:20,688 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 138.6ms TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:49:20,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2881 states. [2021-06-05 03:49:20,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2881 to 2074. [2021-06-05 03:49:20,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2074 states, 2073 states have (on average 2.4582730342498795) internal successors, (5096), 2073 states have internal predecessors, (5096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:20,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2074 states to 2074 states and 5096 transitions. [2021-06-05 03:49:20,706 INFO L78 Accepts]: Start accepts. Automaton has 2074 states and 5096 transitions. Word has length 35 [2021-06-05 03:49:20,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:49:20,706 INFO L482 AbstractCegarLoop]: Abstraction has 2074 states and 5096 transitions. [2021-06-05 03:49:20,706 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:20,706 INFO L276 IsEmpty]: Start isEmpty. Operand 2074 states and 5096 transitions. [2021-06-05 03:49:20,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 03:49:20,707 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:49:20,707 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:49:20,908 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:20,909 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:49:20,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:49:20,909 INFO L82 PathProgramCache]: Analyzing trace with hash 1374152138, now seen corresponding path program 15 times [2021-06-05 03:49:20,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:49:20,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450987562] [2021-06-05 03:49:20,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:49:20,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:20,949 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 32 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:49:20,949 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:49:20,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450987562] [2021-06-05 03:49:20,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450987562] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:20,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148027699] [2021-06-05 03:49:20,949 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:20,973 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 03:49:20,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:49:20,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 03:49:20,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:49:21,020 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 32 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:49:21,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148027699] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:21,020 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:49:21,021 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 8 [2021-06-05 03:49:21,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640898930] [2021-06-05 03:49:21,021 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 03:49:21,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:49:21,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 03:49:21,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-05 03:49:21,021 INFO L87 Difference]: Start difference. First operand 2074 states and 5096 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:21,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:49:21,174 INFO L93 Difference]: Finished difference Result 2850 states and 6708 transitions. [2021-06-05 03:49:21,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 03:49:21,175 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 03:49:21,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:49:21,177 INFO L225 Difference]: With dead ends: 2850 [2021-06-05 03:49:21,177 INFO L226 Difference]: Without dead ends: 2832 [2021-06-05 03:49:21,177 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 58.9ms TimeCoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:49:21,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2832 states. [2021-06-05 03:49:21,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2832 to 2298. [2021-06-05 03:49:21,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2298 states, 2297 states have (on average 2.4902046147148456) internal successors, (5720), 2297 states have internal predecessors, (5720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:21,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2298 states to 2298 states and 5720 transitions. [2021-06-05 03:49:21,199 INFO L78 Accepts]: Start accepts. Automaton has 2298 states and 5720 transitions. Word has length 35 [2021-06-05 03:49:21,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:49:21,199 INFO L482 AbstractCegarLoop]: Abstraction has 2298 states and 5720 transitions. [2021-06-05 03:49:21,199 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:21,199 INFO L276 IsEmpty]: Start isEmpty. Operand 2298 states and 5720 transitions. [2021-06-05 03:49:21,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 03:49:21,200 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:49:21,200 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:49:21,401 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable193 [2021-06-05 03:49:21,401 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:49:21,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:49:21,401 INFO L82 PathProgramCache]: Analyzing trace with hash 752271728, now seen corresponding path program 16 times [2021-06-05 03:49:21,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:49:21,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825289787] [2021-06-05 03:49:21,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:49:21,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:21,444 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 32 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:49:21,445 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:49:21,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825289787] [2021-06-05 03:49:21,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825289787] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:21,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962959747] [2021-06-05 03:49:21,445 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:21,467 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:49:21,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:49:21,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 03:49:21,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:49:21,526 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 33 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:49:21,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962959747] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:21,527 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:49:21,527 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 9 [2021-06-05 03:49:21,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629912215] [2021-06-05 03:49:21,527 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 03:49:21,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:49:21,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 03:49:21,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-06-05 03:49:21,527 INFO L87 Difference]: Start difference. First operand 2298 states and 5720 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:21,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:49:21,708 INFO L93 Difference]: Finished difference Result 2847 states and 6724 transitions. [2021-06-05 03:49:21,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 03:49:21,708 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 03:49:21,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:49:21,711 INFO L225 Difference]: With dead ends: 2847 [2021-06-05 03:49:21,711 INFO L226 Difference]: Without dead ends: 2847 [2021-06-05 03:49:21,711 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 103.3ms TimeCoverageRelationStatistics Valid=99, Invalid=141, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:49:21,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2847 states. [2021-06-05 03:49:21,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2847 to 2179. [2021-06-05 03:49:21,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2179 states, 2178 states have (on average 2.4724517906336088) internal successors, (5385), 2178 states have internal predecessors, (5385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:21,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2179 states to 2179 states and 5385 transitions. [2021-06-05 03:49:21,731 INFO L78 Accepts]: Start accepts. Automaton has 2179 states and 5385 transitions. Word has length 35 [2021-06-05 03:49:21,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:49:21,731 INFO L482 AbstractCegarLoop]: Abstraction has 2179 states and 5385 transitions. [2021-06-05 03:49:21,731 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:21,731 INFO L276 IsEmpty]: Start isEmpty. Operand 2179 states and 5385 transitions. [2021-06-05 03:49:21,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 03:49:21,732 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:49:21,732 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:49:21,933 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,105 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:21,933 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:49:21,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:49:21,933 INFO L82 PathProgramCache]: Analyzing trace with hash -789180772, now seen corresponding path program 39 times [2021-06-05 03:49:21,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:49:21,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312821552] [2021-06-05 03:49:21,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:49:21,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:21,993 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 24 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:49:21,993 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:49:21,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312821552] [2021-06-05 03:49:21,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312821552] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:21,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696432135] [2021-06-05 03:49:21,994 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:22,017 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 03:49:22,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:49:22,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 03:49:22,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:49:22,067 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 24 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:49:22,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696432135] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:22,067 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:49:22,067 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 03:49:22,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790152690] [2021-06-05 03:49:22,067 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 03:49:22,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:49:22,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 03:49:22,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-06-05 03:49:22,068 INFO L87 Difference]: Start difference. First operand 2179 states and 5385 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:22,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:49:22,196 INFO L93 Difference]: Finished difference Result 2663 states and 6272 transitions. [2021-06-05 03:49:22,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 03:49:22,196 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 03:49:22,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:49:22,198 INFO L225 Difference]: With dead ends: 2663 [2021-06-05 03:49:22,198 INFO L226 Difference]: Without dead ends: 2616 [2021-06-05 03:49:22,198 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 85.7ms TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:49:22,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2616 states. [2021-06-05 03:49:22,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2616 to 2188. [2021-06-05 03:49:22,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2188 states, 2187 states have (on average 2.4686785550983084) internal successors, (5399), 2187 states have internal predecessors, (5399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:22,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2188 states to 2188 states and 5399 transitions. [2021-06-05 03:49:22,217 INFO L78 Accepts]: Start accepts. Automaton has 2188 states and 5399 transitions. Word has length 35 [2021-06-05 03:49:22,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:49:22,217 INFO L482 AbstractCegarLoop]: Abstraction has 2188 states and 5399 transitions. [2021-06-05 03:49:22,217 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:22,217 INFO L276 IsEmpty]: Start isEmpty. Operand 2188 states and 5399 transitions. [2021-06-05 03:49:22,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 03:49:22,219 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:49:22,219 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:49:22,419 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:22,419 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:49:22,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:49:22,420 INFO L82 PathProgramCache]: Analyzing trace with hash 1018494725, now seen corresponding path program 40 times [2021-06-05 03:49:22,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:49:22,420 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120000619] [2021-06-05 03:49:22,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:49:22,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:22,467 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:49:22,468 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:49:22,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120000619] [2021-06-05 03:49:22,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120000619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:22,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789185434] [2021-06-05 03:49:22,468 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:22,491 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:49:22,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:49:22,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 03:49:22,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:49:22,655 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 22 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:49:22,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789185434] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:22,655 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:49:22,655 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 11] total 16 [2021-06-05 03:49:22,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862457212] [2021-06-05 03:49:22,655 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 03:49:22,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:49:22,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 03:49:22,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:49:22,656 INFO L87 Difference]: Start difference. First operand 2188 states and 5399 transitions. Second operand has 17 states, 17 states have (on average 4.411764705882353) internal successors, (75), 16 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:23,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:49:23,342 INFO L93 Difference]: Finished difference Result 3588 states and 8244 transitions. [2021-06-05 03:49:23,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 03:49:23,342 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.411764705882353) internal successors, (75), 16 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 03:49:23,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:49:23,346 INFO L225 Difference]: With dead ends: 3588 [2021-06-05 03:49:23,346 INFO L226 Difference]: Without dead ends: 3550 [2021-06-05 03:49:23,346 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 391.5ms TimeCoverageRelationStatistics Valid=345, Invalid=1215, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 03:49:23,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3550 states. [2021-06-05 03:49:23,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3550 to 2578. [2021-06-05 03:49:23,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2578 states, 2577 states have (on average 2.43500194024059) internal successors, (6275), 2577 states have internal predecessors, (6275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:23,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2578 states to 2578 states and 6275 transitions. [2021-06-05 03:49:23,371 INFO L78 Accepts]: Start accepts. Automaton has 2578 states and 6275 transitions. Word has length 38 [2021-06-05 03:49:23,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:49:23,372 INFO L482 AbstractCegarLoop]: Abstraction has 2578 states and 6275 transitions. [2021-06-05 03:49:23,372 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.411764705882353) internal successors, (75), 16 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:23,372 INFO L276 IsEmpty]: Start isEmpty. Operand 2578 states and 6275 transitions. [2021-06-05 03:49:23,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 03:49:23,373 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:49:23,373 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:49:23,575 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:23,575 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:49:23,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:49:23,575 INFO L82 PathProgramCache]: Analyzing trace with hash 988310311, now seen corresponding path program 41 times [2021-06-05 03:49:23,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:49:23,576 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883720517] [2021-06-05 03:49:23,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:49:23,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:23,624 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 03:49:23,624 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:49:23,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883720517] [2021-06-05 03:49:23,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883720517] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:23,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917494319] [2021-06-05 03:49:23,624 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:23,650 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 03:49:23,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:49:23,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 03:49:23,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:49:23,697 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 03:49:23,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917494319] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:23,697 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:49:23,697 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-05 03:49:23,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880158727] [2021-06-05 03:49:23,698 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 03:49:23,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:49:23,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 03:49:23,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-05 03:49:23,698 INFO L87 Difference]: Start difference. First operand 2578 states and 6275 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:23,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:49:23,824 INFO L93 Difference]: Finished difference Result 3224 states and 7683 transitions. [2021-06-05 03:49:23,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 03:49:23,824 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 03:49:23,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:49:23,827 INFO L225 Difference]: With dead ends: 3224 [2021-06-05 03:49:23,827 INFO L226 Difference]: Without dead ends: 3189 [2021-06-05 03:49:23,827 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 29.2ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-05 03:49:23,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3189 states. [2021-06-05 03:49:23,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3189 to 2741. [2021-06-05 03:49:23,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2741 states, 2740 states have (on average 2.4572992700729928) internal successors, (6733), 2740 states have internal predecessors, (6733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:23,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2741 states to 2741 states and 6733 transitions. [2021-06-05 03:49:23,851 INFO L78 Accepts]: Start accepts. Automaton has 2741 states and 6733 transitions. Word has length 38 [2021-06-05 03:49:23,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:49:23,851 INFO L482 AbstractCegarLoop]: Abstraction has 2741 states and 6733 transitions. [2021-06-05 03:49:23,851 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:23,851 INFO L276 IsEmpty]: Start isEmpty. Operand 2741 states and 6733 transitions. [2021-06-05 03:49:23,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 03:49:23,853 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:49:23,853 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:49:24,053 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2021-06-05 03:49:24,053 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:49:24,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:49:24,053 INFO L82 PathProgramCache]: Analyzing trace with hash -1650028221, now seen corresponding path program 42 times [2021-06-05 03:49:24,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:49:24,054 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332203353] [2021-06-05 03:49:24,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:49:24,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:24,088 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 03:49:24,088 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:49:24,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332203353] [2021-06-05 03:49:24,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332203353] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:24,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306807921] [2021-06-05 03:49:24,088 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:24,125 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-05 03:49:24,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:49:24,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 03:49:24,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:49:24,249 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 10 proven. 41 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:49:24,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306807921] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:24,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:49:24,249 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2021-06-05 03:49:24,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85395834] [2021-06-05 03:49:24,249 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 03:49:24,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:49:24,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 03:49:24,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:49:24,249 INFO L87 Difference]: Start difference. First operand 2741 states and 6733 transitions. Second operand has 13 states, 13 states have (on average 5.538461538461538) internal successors, (72), 12 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:24,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:49:24,706 INFO L93 Difference]: Finished difference Result 4464 states and 10129 transitions. [2021-06-05 03:49:24,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 03:49:24,707 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.538461538461538) internal successors, (72), 12 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 03:49:24,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:49:24,711 INFO L225 Difference]: With dead ends: 4464 [2021-06-05 03:49:24,711 INFO L226 Difference]: Without dead ends: 4401 [2021-06-05 03:49:24,711 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 206.4ms TimeCoverageRelationStatistics Valid=158, Invalid=598, Unknown=0, NotChecked=0, Total=756 [2021-06-05 03:49:24,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4401 states. [2021-06-05 03:49:24,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4401 to 2892. [2021-06-05 03:49:24,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2892 states, 2891 states have (on average 2.4787270840539604) internal successors, (7166), 2891 states have internal predecessors, (7166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:24,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2892 states to 2892 states and 7166 transitions. [2021-06-05 03:49:24,741 INFO L78 Accepts]: Start accepts. Automaton has 2892 states and 7166 transitions. Word has length 38 [2021-06-05 03:49:24,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:49:24,741 INFO L482 AbstractCegarLoop]: Abstraction has 2892 states and 7166 transitions. [2021-06-05 03:49:24,741 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.538461538461538) internal successors, (72), 12 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:24,741 INFO L276 IsEmpty]: Start isEmpty. Operand 2892 states and 7166 transitions. [2021-06-05 03:49:24,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 03:49:24,743 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:49:24,743 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:49:24,943 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable206,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:24,943 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:49:24,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:49:24,944 INFO L82 PathProgramCache]: Analyzing trace with hash 1035175619, now seen corresponding path program 43 times [2021-06-05 03:49:24,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:49:24,944 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987605390] [2021-06-05 03:49:24,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:49:24,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:24,978 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 03:49:24,978 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:49:24,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987605390] [2021-06-05 03:49:24,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987605390] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:24,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182881673] [2021-06-05 03:49:24,978 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:25,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:25,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 03:49:25,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:49:25,047 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 03:49:25,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182881673] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:25,047 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:49:25,047 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-05 03:49:25,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585290502] [2021-06-05 03:49:25,047 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 03:49:25,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:49:25,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 03:49:25,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-05 03:49:25,047 INFO L87 Difference]: Start difference. First operand 2892 states and 7166 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:25,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:49:25,173 INFO L93 Difference]: Finished difference Result 3617 states and 8704 transitions. [2021-06-05 03:49:25,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 03:49:25,173 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 03:49:25,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:49:25,177 INFO L225 Difference]: With dead ends: 3617 [2021-06-05 03:49:25,177 INFO L226 Difference]: Without dead ends: 3592 [2021-06-05 03:49:25,177 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.1ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-05 03:49:25,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3592 states. [2021-06-05 03:49:25,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3592 to 3175. [2021-06-05 03:49:25,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3175 states, 3174 states have (on average 2.4697542533081287) internal successors, (7839), 3174 states have internal predecessors, (7839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:25,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3175 states to 3175 states and 7839 transitions. [2021-06-05 03:49:25,206 INFO L78 Accepts]: Start accepts. Automaton has 3175 states and 7839 transitions. Word has length 38 [2021-06-05 03:49:25,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:49:25,206 INFO L482 AbstractCegarLoop]: Abstraction has 3175 states and 7839 transitions. [2021-06-05 03:49:25,206 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:25,206 INFO L276 IsEmpty]: Start isEmpty. Operand 3175 states and 7839 transitions. [2021-06-05 03:49:25,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 03:49:25,208 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:49:25,208 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:49:25,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable207 [2021-06-05 03:49:25,413 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:49:25,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:49:25,413 INFO L82 PathProgramCache]: Analyzing trace with hash -1350282616, now seen corresponding path program 17 times [2021-06-05 03:49:25,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:49:25,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559537861] [2021-06-05 03:49:25,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:49:25,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:25,485 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:49:25,485 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:49:25,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559537861] [2021-06-05 03:49:25,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559537861] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:25,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396078724] [2021-06-05 03:49:25,485 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:25,517 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 03:49:25,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:49:25,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 03:49:25,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:49:25,574 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:49:25,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396078724] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:25,574 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:49:25,574 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 03:49:25,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583771335] [2021-06-05 03:49:25,574 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 03:49:25,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:49:25,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 03:49:25,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:49:25,574 INFO L87 Difference]: Start difference. First operand 3175 states and 7839 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:25,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:49:25,981 INFO L93 Difference]: Finished difference Result 4225 states and 9893 transitions. [2021-06-05 03:49:25,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 03:49:25,981 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 03:49:25,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:49:25,985 INFO L225 Difference]: With dead ends: 4225 [2021-06-05 03:49:25,985 INFO L226 Difference]: Without dead ends: 4189 [2021-06-05 03:49:25,985 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 190.9ms TimeCoverageRelationStatistics Valid=126, Invalid=524, Unknown=0, NotChecked=0, Total=650 [2021-06-05 03:49:25,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4189 states. [2021-06-05 03:49:26,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4189 to 3084. [2021-06-05 03:49:26,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3084 states, 3083 states have (on average 2.480051897502433) internal successors, (7646), 3083 states have internal predecessors, (7646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:26,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3084 states to 3084 states and 7646 transitions. [2021-06-05 03:49:26,013 INFO L78 Accepts]: Start accepts. Automaton has 3084 states and 7646 transitions. Word has length 41 [2021-06-05 03:49:26,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:49:26,013 INFO L482 AbstractCegarLoop]: Abstraction has 3084 states and 7646 transitions. [2021-06-05 03:49:26,013 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:26,013 INFO L276 IsEmpty]: Start isEmpty. Operand 3084 states and 7646 transitions. [2021-06-05 03:49:26,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 03:49:26,015 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:49:26,015 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:49:26,215 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:26,216 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:49:26,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:49:26,216 INFO L82 PathProgramCache]: Analyzing trace with hash 1492128392, now seen corresponding path program 44 times [2021-06-05 03:49:26,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:49:26,216 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364848718] [2021-06-05 03:49:26,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:49:26,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:26,298 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 11 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:49:26,298 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:49:26,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364848718] [2021-06-05 03:49:26,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364848718] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:26,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538802514] [2021-06-05 03:49:26,298 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:26,323 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:49:26,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:49:26,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 03:49:26,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:49:26,480 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 9 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:49:26,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538802514] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:26,480 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:49:26,480 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 03:49:26,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210723422] [2021-06-05 03:49:26,480 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 03:49:26,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:49:26,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 03:49:26,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:49:26,480 INFO L87 Difference]: Start difference. First operand 3084 states and 7646 transitions. Second operand has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:26,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:49:26,993 INFO L93 Difference]: Finished difference Result 3304 states and 7993 transitions. [2021-06-05 03:49:26,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 03:49:26,993 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 03:49:26,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:49:26,996 INFO L225 Difference]: With dead ends: 3304 [2021-06-05 03:49:26,996 INFO L226 Difference]: Without dead ends: 3236 [2021-06-05 03:49:26,996 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 138.4ms TimeCoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:49:26,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3236 states. [2021-06-05 03:49:27,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3236 to 3084. [2021-06-05 03:49:27,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3084 states, 3083 states have (on average 2.474862147259163) internal successors, (7630), 3083 states have internal predecessors, (7630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:27,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3084 states to 3084 states and 7630 transitions. [2021-06-05 03:49:27,021 INFO L78 Accepts]: Start accepts. Automaton has 3084 states and 7630 transitions. Word has length 41 [2021-06-05 03:49:27,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:49:27,021 INFO L482 AbstractCegarLoop]: Abstraction has 3084 states and 7630 transitions. [2021-06-05 03:49:27,021 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:27,021 INFO L276 IsEmpty]: Start isEmpty. Operand 3084 states and 7630 transitions. [2021-06-05 03:49:27,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 03:49:27,023 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:49:27,023 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:49:27,224 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable209 [2021-06-05 03:49:27,224 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:49:27,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:49:27,224 INFO L82 PathProgramCache]: Analyzing trace with hash -1073103992, now seen corresponding path program 45 times [2021-06-05 03:49:27,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:49:27,224 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304935585] [2021-06-05 03:49:27,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:49:27,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:27,280 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:49:27,280 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:49:27,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304935585] [2021-06-05 03:49:27,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304935585] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:27,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512950606] [2021-06-05 03:49:27,280 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:27,306 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 03:49:27,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:49:27,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 03:49:27,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:49:27,362 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:49:27,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512950606] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:27,363 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:49:27,363 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 03:49:27,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290985131] [2021-06-05 03:49:27,363 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 03:49:27,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:49:27,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 03:49:27,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-06-05 03:49:27,363 INFO L87 Difference]: Start difference. First operand 3084 states and 7630 transitions. Second operand has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:27,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:49:27,540 INFO L93 Difference]: Finished difference Result 3450 states and 8325 transitions. [2021-06-05 03:49:27,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 03:49:27,540 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 03:49:27,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:49:27,543 INFO L225 Difference]: With dead ends: 3450 [2021-06-05 03:49:27,543 INFO L226 Difference]: Without dead ends: 3450 [2021-06-05 03:49:27,543 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 77.6ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:49:27,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3450 states. [2021-06-05 03:49:27,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3450 to 3096. [2021-06-05 03:49:27,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3096 states, 3095 states have (on average 2.477221324717286) internal successors, (7667), 3095 states have internal predecessors, (7667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:27,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3096 states to 3096 states and 7667 transitions. [2021-06-05 03:49:27,569 INFO L78 Accepts]: Start accepts. Automaton has 3096 states and 7667 transitions. Word has length 41 [2021-06-05 03:49:27,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:49:27,569 INFO L482 AbstractCegarLoop]: Abstraction has 3096 states and 7667 transitions. [2021-06-05 03:49:27,569 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:27,569 INFO L276 IsEmpty]: Start isEmpty. Operand 3096 states and 7667 transitions. [2021-06-05 03:49:27,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 03:49:27,571 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:49:27,571 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:49:27,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2021-06-05 03:49:27,772 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:49:27,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:49:27,772 INFO L82 PathProgramCache]: Analyzing trace with hash 665060437, now seen corresponding path program 18 times [2021-06-05 03:49:27,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:49:27,772 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492024074] [2021-06-05 03:49:27,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:49:27,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:27,858 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 41 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:49:27,858 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:49:27,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492024074] [2021-06-05 03:49:27,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492024074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:27,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257099858] [2021-06-05 03:49:27,858 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:27,883 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 03:49:27,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:49:27,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 03:49:27,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:49:27,953 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 41 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:49:27,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257099858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:27,953 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:49:27,953 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 14 [2021-06-05 03:49:27,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678076984] [2021-06-05 03:49:27,954 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 03:49:27,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:49:27,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 03:49:27,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:49:27,954 INFO L87 Difference]: Start difference. First operand 3096 states and 7667 transitions. Second operand has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:28,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:49:28,150 INFO L93 Difference]: Finished difference Result 4321 states and 10236 transitions. [2021-06-05 03:49:28,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 03:49:28,150 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 03:49:28,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:49:28,153 INFO L225 Difference]: With dead ends: 4321 [2021-06-05 03:49:28,153 INFO L226 Difference]: Without dead ends: 4263 [2021-06-05 03:49:28,154 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 128.7ms TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:49:28,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4263 states. [2021-06-05 03:49:28,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4263 to 3240. [2021-06-05 03:49:28,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3240 states, 3239 states have (on average 2.4902747761654833) internal successors, (8066), 3239 states have internal predecessors, (8066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:28,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3240 states to 3240 states and 8066 transitions. [2021-06-05 03:49:28,185 INFO L78 Accepts]: Start accepts. Automaton has 3240 states and 8066 transitions. Word has length 41 [2021-06-05 03:49:28,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:49:28,185 INFO L482 AbstractCegarLoop]: Abstraction has 3240 states and 8066 transitions. [2021-06-05 03:49:28,185 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:28,185 INFO L276 IsEmpty]: Start isEmpty. Operand 3240 states and 8066 transitions. [2021-06-05 03:49:28,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 03:49:28,187 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:49:28,187 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:49:28,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2021-06-05 03:49:28,388 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:49:28,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:49:28,388 INFO L82 PathProgramCache]: Analyzing trace with hash 9364347, now seen corresponding path program 19 times [2021-06-05 03:49:28,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:49:28,388 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017996789] [2021-06-05 03:49:28,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:49:28,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:28,434 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 42 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:49:28,434 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:49:28,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017996789] [2021-06-05 03:49:28,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017996789] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:28,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247530812] [2021-06-05 03:49:28,434 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:28,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:28,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 03:49:28,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:49:28,519 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 43 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:49:28,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247530812] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:28,519 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:49:28,519 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 9 [2021-06-05 03:49:28,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230910721] [2021-06-05 03:49:28,519 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 03:49:28,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:49:28,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 03:49:28,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-06-05 03:49:28,520 INFO L87 Difference]: Start difference. First operand 3240 states and 8066 transitions. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:28,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:49:28,639 INFO L93 Difference]: Finished difference Result 4797 states and 11528 transitions. [2021-06-05 03:49:28,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 03:49:28,639 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 03:49:28,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:49:28,644 INFO L225 Difference]: With dead ends: 4797 [2021-06-05 03:49:28,644 INFO L226 Difference]: Without dead ends: 4797 [2021-06-05 03:49:28,644 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 48.1ms TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-06-05 03:49:28,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4797 states. [2021-06-05 03:49:28,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4797 to 3486. [2021-06-05 03:49:28,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3486 states, 3485 states have (on average 2.5265423242467717) internal successors, (8805), 3485 states have internal predecessors, (8805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:28,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3486 states to 3486 states and 8805 transitions. [2021-06-05 03:49:28,681 INFO L78 Accepts]: Start accepts. Automaton has 3486 states and 8805 transitions. Word has length 41 [2021-06-05 03:49:28,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:49:28,681 INFO L482 AbstractCegarLoop]: Abstraction has 3486 states and 8805 transitions. [2021-06-05 03:49:28,681 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:28,681 INFO L276 IsEmpty]: Start isEmpty. Operand 3486 states and 8805 transitions. [2021-06-05 03:49:28,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 03:49:28,684 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:49:28,684 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:49:28,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:28,884 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:49:28,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:49:28,885 INFO L82 PathProgramCache]: Analyzing trace with hash -524501029, now seen corresponding path program 46 times [2021-06-05 03:49:28,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:49:28,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885565197] [2021-06-05 03:49:28,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:49:28,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:28,927 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 33 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:49:28,928 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:49:28,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885565197] [2021-06-05 03:49:28,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885565197] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:28,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731230018] [2021-06-05 03:49:28,928 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:28,951 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:49:28,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:49:28,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 03:49:28,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:49:29,008 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 33 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:49:29,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731230018] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:29,008 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:49:29,008 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-05 03:49:29,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682816584] [2021-06-05 03:49:29,009 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 03:49:29,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:49:29,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 03:49:29,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-06-05 03:49:29,009 INFO L87 Difference]: Start difference. First operand 3486 states and 8805 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:29,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:49:29,118 INFO L93 Difference]: Finished difference Result 3733 states and 9242 transitions. [2021-06-05 03:49:29,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 03:49:29,118 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 03:49:29,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:49:29,121 INFO L225 Difference]: With dead ends: 3733 [2021-06-05 03:49:29,121 INFO L226 Difference]: Without dead ends: 3727 [2021-06-05 03:49:29,122 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 40.4ms TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-05 03:49:29,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3727 states. [2021-06-05 03:49:29,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3727 to 3447. [2021-06-05 03:49:29,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3447 states, 3446 states have (on average 2.5194428322692977) internal successors, (8682), 3446 states have internal predecessors, (8682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:29,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3447 states to 3447 states and 8682 transitions. [2021-06-05 03:49:29,152 INFO L78 Accepts]: Start accepts. Automaton has 3447 states and 8682 transitions. Word has length 41 [2021-06-05 03:49:29,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:49:29,152 INFO L482 AbstractCegarLoop]: Abstraction has 3447 states and 8682 transitions. [2021-06-05 03:49:29,152 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:29,152 INFO L276 IsEmpty]: Start isEmpty. Operand 3447 states and 8682 transitions. [2021-06-05 03:49:29,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 03:49:29,155 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:49:29,155 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:49:29,362 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable219 [2021-06-05 03:49:29,362 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:49:29,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:49:29,362 INFO L82 PathProgramCache]: Analyzing trace with hash -1583917210, now seen corresponding path program 20 times [2021-06-05 03:49:29,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:49:29,362 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419590103] [2021-06-05 03:49:29,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:49:29,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:29,421 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 6 proven. 57 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:49:29,421 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:49:29,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419590103] [2021-06-05 03:49:29,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419590103] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:29,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006092100] [2021-06-05 03:49:29,422 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:29,445 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:49:29,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:49:29,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 03:49:29,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:49:29,499 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 58 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:49:29,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006092100] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:29,499 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:49:29,499 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 03:49:29,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483074734] [2021-06-05 03:49:29,500 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 03:49:29,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:49:29,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 03:49:29,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-06-05 03:49:29,500 INFO L87 Difference]: Start difference. First operand 3447 states and 8682 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:29,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:49:29,701 INFO L93 Difference]: Finished difference Result 4309 states and 10396 transitions. [2021-06-05 03:49:29,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 03:49:29,702 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 03:49:29,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:49:29,705 INFO L225 Difference]: With dead ends: 4309 [2021-06-05 03:49:29,705 INFO L226 Difference]: Without dead ends: 4278 [2021-06-05 03:49:29,705 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 77.8ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:49:29,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4278 states. [2021-06-05 03:49:29,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4278 to 3497. [2021-06-05 03:49:29,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3497 states, 3496 states have (on average 2.5160183066361554) internal successors, (8796), 3496 states have internal predecessors, (8796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:29,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3497 states to 3497 states and 8796 transitions. [2021-06-05 03:49:29,739 INFO L78 Accepts]: Start accepts. Automaton has 3497 states and 8796 transitions. Word has length 41 [2021-06-05 03:49:29,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:49:29,739 INFO L482 AbstractCegarLoop]: Abstraction has 3497 states and 8796 transitions. [2021-06-05 03:49:29,739 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:29,739 INFO L276 IsEmpty]: Start isEmpty. Operand 3497 states and 8796 transitions. [2021-06-05 03:49:29,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 03:49:29,741 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:49:29,742 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:49:29,942 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable222,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:29,942 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:49:29,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:49:29,942 INFO L82 PathProgramCache]: Analyzing trace with hash 1157353229, now seen corresponding path program 47 times [2021-06-05 03:49:29,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:49:29,942 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300585394] [2021-06-05 03:49:29,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:49:29,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:29,981 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 31 proven. 32 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 03:49:29,981 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:49:29,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300585394] [2021-06-05 03:49:29,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300585394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:29,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338333497] [2021-06-05 03:49:29,981 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:30,006 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 03:49:30,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:49:30,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 03:49:30,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:49:30,073 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 35 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:49:30,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338333497] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:30,074 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:49:30,074 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10] total 11 [2021-06-05 03:49:30,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142008683] [2021-06-05 03:49:30,074 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 03:49:30,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:49:30,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 03:49:30,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:49:30,074 INFO L87 Difference]: Start difference. First operand 3497 states and 8796 transitions. Second operand has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 11 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:30,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:49:30,242 INFO L93 Difference]: Finished difference Result 4421 states and 10653 transitions. [2021-06-05 03:49:30,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 03:49:30,242 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 11 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 03:49:30,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:49:30,247 INFO L225 Difference]: With dead ends: 4421 [2021-06-05 03:49:30,247 INFO L226 Difference]: Without dead ends: 4412 [2021-06-05 03:49:30,247 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 56.4ms TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:49:30,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4412 states. [2021-06-05 03:49:30,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4412 to 3587. [2021-06-05 03:49:30,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3587 states, 3586 states have (on average 2.5312325711098715) internal successors, (9077), 3586 states have internal predecessors, (9077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:30,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3587 states to 3587 states and 9077 transitions. [2021-06-05 03:49:30,285 INFO L78 Accepts]: Start accepts. Automaton has 3587 states and 9077 transitions. Word has length 41 [2021-06-05 03:49:30,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:49:30,285 INFO L482 AbstractCegarLoop]: Abstraction has 3587 states and 9077 transitions. [2021-06-05 03:49:30,285 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 11 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:30,285 INFO L276 IsEmpty]: Start isEmpty. Operand 3587 states and 9077 transitions. [2021-06-05 03:49:30,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 03:49:30,288 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:49:30,289 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:49:30,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2021-06-05 03:49:30,504 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:49:30,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:49:30,504 INFO L82 PathProgramCache]: Analyzing trace with hash 1364415795, now seen corresponding path program 48 times [2021-06-05 03:49:30,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:49:30,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664989313] [2021-06-05 03:49:30,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:49:30,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:30,543 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 28 proven. 35 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 03:49:30,543 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:49:30,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664989313] [2021-06-05 03:49:30,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664989313] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:30,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867242863] [2021-06-05 03:49:30,543 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:30,568 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 03:49:30,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:49:30,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 03:49:30,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:49:30,620 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 28 proven. 35 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 03:49:30,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867242863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:30,621 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:49:30,621 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-05 03:49:30,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970875399] [2021-06-05 03:49:30,621 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 03:49:30,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:49:30,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 03:49:30,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-06-05 03:49:30,621 INFO L87 Difference]: Start difference. First operand 3587 states and 9077 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:30,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:49:30,740 INFO L93 Difference]: Finished difference Result 4253 states and 10263 transitions. [2021-06-05 03:49:30,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 03:49:30,741 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 03:49:30,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:49:30,744 INFO L225 Difference]: With dead ends: 4253 [2021-06-05 03:49:30,744 INFO L226 Difference]: Without dead ends: 4235 [2021-06-05 03:49:30,744 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 50.5ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:49:30,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4235 states. [2021-06-05 03:49:30,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4235 to 3587. [2021-06-05 03:49:30,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3587 states, 3586 states have (on average 2.5284439486893473) internal successors, (9067), 3586 states have internal predecessors, (9067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:30,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3587 states to 3587 states and 9067 transitions. [2021-06-05 03:49:30,777 INFO L78 Accepts]: Start accepts. Automaton has 3587 states and 9067 transitions. Word has length 41 [2021-06-05 03:49:30,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:49:30,777 INFO L482 AbstractCegarLoop]: Abstraction has 3587 states and 9067 transitions. [2021-06-05 03:49:30,777 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:30,777 INFO L276 IsEmpty]: Start isEmpty. Operand 3587 states and 9067 transitions. [2021-06-05 03:49:30,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 03:49:30,779 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:49:30,780 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:49:30,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable225 [2021-06-05 03:49:30,981 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:49:30,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:49:30,981 INFO L82 PathProgramCache]: Analyzing trace with hash -83584218, now seen corresponding path program 49 times [2021-06-05 03:49:30,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:49:30,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467148260] [2021-06-05 03:49:30,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:49:30,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:31,030 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 14 proven. 49 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:49:31,031 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:49:31,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467148260] [2021-06-05 03:49:31,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467148260] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:31,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459688900] [2021-06-05 03:49:31,032 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:31,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:31,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 03:49:31,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:49:31,119 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 9 proven. 54 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:49:31,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459688900] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:31,119 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:49:31,119 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-06-05 03:49:31,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734907943] [2021-06-05 03:49:31,120 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 03:49:31,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:49:31,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 03:49:31,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-06-05 03:49:31,121 INFO L87 Difference]: Start difference. First operand 3587 states and 9067 transitions. Second operand has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:31,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:49:31,455 INFO L93 Difference]: Finished difference Result 4054 states and 9921 transitions. [2021-06-05 03:49:31,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 03:49:31,455 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 03:49:31,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:49:31,459 INFO L225 Difference]: With dead ends: 4054 [2021-06-05 03:49:31,459 INFO L226 Difference]: Without dead ends: 4016 [2021-06-05 03:49:31,459 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 72.8ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:49:31,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4016 states. [2021-06-05 03:49:31,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4016 to 3593. [2021-06-05 03:49:31,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3593 states, 3592 states have (on average 2.525055679287305) internal successors, (9070), 3592 states have internal predecessors, (9070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:31,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3593 states to 3593 states and 9070 transitions. [2021-06-05 03:49:31,494 INFO L78 Accepts]: Start accepts. Automaton has 3593 states and 9070 transitions. Word has length 41 [2021-06-05 03:49:31,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:49:31,494 INFO L482 AbstractCegarLoop]: Abstraction has 3593 states and 9070 transitions. [2021-06-05 03:49:31,494 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:31,494 INFO L276 IsEmpty]: Start isEmpty. Operand 3593 states and 9070 transitions. [2021-06-05 03:49:31,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 03:49:31,497 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:49:31,497 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:49:31,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable228 [2021-06-05 03:49:31,705 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:49:31,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:49:31,705 INFO L82 PathProgramCache]: Analyzing trace with hash -697120398, now seen corresponding path program 50 times [2021-06-05 03:49:31,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:49:31,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697381543] [2021-06-05 03:49:31,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:49:31,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:31,767 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 11 proven. 50 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 03:49:31,767 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:49:31,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697381543] [2021-06-05 03:49:31,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697381543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:31,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360583554] [2021-06-05 03:49:31,767 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:31,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:49:31,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:49:31,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 03:49:31,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:49:31,850 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 03:49:31,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360583554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:31,850 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:49:31,850 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 03:49:31,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336135512] [2021-06-05 03:49:31,850 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 03:49:31,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:49:31,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 03:49:31,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-06-05 03:49:31,851 INFO L87 Difference]: Start difference. First operand 3593 states and 9070 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:32,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:49:32,076 INFO L93 Difference]: Finished difference Result 4259 states and 10390 transitions. [2021-06-05 03:49:32,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 03:49:32,076 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 03:49:32,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:49:32,079 INFO L225 Difference]: With dead ends: 4259 [2021-06-05 03:49:32,080 INFO L226 Difference]: Without dead ends: 4247 [2021-06-05 03:49:32,080 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 76.5ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:49:32,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4247 states. [2021-06-05 03:49:32,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4247 to 3595. [2021-06-05 03:49:32,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3595 states, 3594 states have (on average 2.5242070116861437) internal successors, (9072), 3594 states have internal predecessors, (9072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:32,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3595 states to 3595 states and 9072 transitions. [2021-06-05 03:49:32,113 INFO L78 Accepts]: Start accepts. Automaton has 3595 states and 9072 transitions. Word has length 41 [2021-06-05 03:49:32,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:49:32,113 INFO L482 AbstractCegarLoop]: Abstraction has 3595 states and 9072 transitions. [2021-06-05 03:49:32,113 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:32,113 INFO L276 IsEmpty]: Start isEmpty. Operand 3595 states and 9072 transitions. [2021-06-05 03:49:32,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 03:49:32,116 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:49:32,116 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:49:32,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:32,329 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:49:32,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:49:32,329 INFO L82 PathProgramCache]: Analyzing trace with hash 1444796936, now seen corresponding path program 51 times [2021-06-05 03:49:32,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:49:32,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239863096] [2021-06-05 03:49:32,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:49:32,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:32,382 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:49:32,383 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:49:32,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239863096] [2021-06-05 03:49:32,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239863096] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:32,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218812421] [2021-06-05 03:49:32,383 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:32,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-05 03:49:32,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:49:32,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 03:49:32,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:49:32,461 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:49:32,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218812421] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:32,462 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:49:32,462 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 03:49:32,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564272356] [2021-06-05 03:49:32,462 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 03:49:32,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:49:32,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 03:49:32,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-05 03:49:32,462 INFO L87 Difference]: Start difference. First operand 3595 states and 9072 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:32,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:49:32,722 INFO L93 Difference]: Finished difference Result 4613 states and 11146 transitions. [2021-06-05 03:49:32,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 03:49:32,722 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 03:49:32,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:49:32,726 INFO L225 Difference]: With dead ends: 4613 [2021-06-05 03:49:32,726 INFO L226 Difference]: Without dead ends: 4601 [2021-06-05 03:49:32,726 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 97.5ms TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:49:32,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4601 states. [2021-06-05 03:49:32,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4601 to 3620. [2021-06-05 03:49:32,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3620 states, 3619 states have (on average 2.5230726720088423) internal successors, (9131), 3619 states have internal predecessors, (9131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:32,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3620 states to 3620 states and 9131 transitions. [2021-06-05 03:49:32,761 INFO L78 Accepts]: Start accepts. Automaton has 3620 states and 9131 transitions. Word has length 41 [2021-06-05 03:49:32,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:49:32,761 INFO L482 AbstractCegarLoop]: Abstraction has 3620 states and 9131 transitions. [2021-06-05 03:49:32,761 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:32,761 INFO L276 IsEmpty]: Start isEmpty. Operand 3620 states and 9131 transitions. [2021-06-05 03:49:32,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 03:49:32,763 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:49:32,763 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:49:32,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,122 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:32,964 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:49:32,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:49:32,964 INFO L82 PathProgramCache]: Analyzing trace with hash 1206735419, now seen corresponding path program 21 times [2021-06-05 03:49:32,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:49:32,964 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150667812] [2021-06-05 03:49:32,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:49:32,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:33,003 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 45 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:49:33,004 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:49:33,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150667812] [2021-06-05 03:49:33,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150667812] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:33,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022008132] [2021-06-05 03:49:33,004 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:33,028 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 03:49:33,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:49:33,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 03:49:33,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:49:33,083 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 46 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:49:33,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022008132] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:33,084 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:49:33,084 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 9 [2021-06-05 03:49:33,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695706203] [2021-06-05 03:49:33,084 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 03:49:33,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:49:33,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 03:49:33,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-06-05 03:49:33,084 INFO L87 Difference]: Start difference. First operand 3620 states and 9131 transitions. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:33,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:49:33,202 INFO L93 Difference]: Finished difference Result 4855 states and 11693 transitions. [2021-06-05 03:49:33,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 03:49:33,202 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 03:49:33,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:49:33,206 INFO L225 Difference]: With dead ends: 4855 [2021-06-05 03:49:33,206 INFO L226 Difference]: Without dead ends: 4847 [2021-06-05 03:49:33,207 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 47.0ms TimeCoverageRelationStatistics Valid=55, Invalid=77, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:49:33,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4847 states. [2021-06-05 03:49:33,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4847 to 3739. [2021-06-05 03:49:33,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3739 states, 3738 states have (on average 2.537720706260032) internal successors, (9486), 3738 states have internal predecessors, (9486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:33,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3739 states to 3739 states and 9486 transitions. [2021-06-05 03:49:33,243 INFO L78 Accepts]: Start accepts. Automaton has 3739 states and 9486 transitions. Word has length 41 [2021-06-05 03:49:33,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:49:33,243 INFO L482 AbstractCegarLoop]: Abstraction has 3739 states and 9486 transitions. [2021-06-05 03:49:33,243 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:33,243 INFO L276 IsEmpty]: Start isEmpty. Operand 3739 states and 9486 transitions. [2021-06-05 03:49:33,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 03:49:33,245 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:49:33,245 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:49:33,446 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:33,446 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:49:33,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:49:33,446 INFO L82 PathProgramCache]: Analyzing trace with hash 584855009, now seen corresponding path program 22 times [2021-06-05 03:49:33,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:49:33,446 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079988427] [2021-06-05 03:49:33,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:49:33,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:33,484 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 45 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:49:33,484 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:49:33,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079988427] [2021-06-05 03:49:33,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079988427] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:33,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029438411] [2021-06-05 03:49:33,485 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:33,509 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:49:33,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:49:33,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 03:49:33,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:49:33,567 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 46 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:49:33,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029438411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:33,567 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:49:33,567 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 9 [2021-06-05 03:49:33,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920505891] [2021-06-05 03:49:33,567 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 03:49:33,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:49:33,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 03:49:33,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-06-05 03:49:33,568 INFO L87 Difference]: Start difference. First operand 3739 states and 9486 transitions. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:33,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:49:33,696 INFO L93 Difference]: Finished difference Result 5507 states and 13181 transitions. [2021-06-05 03:49:33,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 03:49:33,696 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 03:49:33,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:49:33,701 INFO L225 Difference]: With dead ends: 5507 [2021-06-05 03:49:33,701 INFO L226 Difference]: Without dead ends: 5507 [2021-06-05 03:49:33,701 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 48.9ms TimeCoverageRelationStatistics Valid=55, Invalid=77, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:49:33,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5507 states. [2021-06-05 03:49:33,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5507 to 3748. [2021-06-05 03:49:33,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3748 states, 3747 states have (on average 2.536962903656258) internal successors, (9506), 3747 states have internal predecessors, (9506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:33,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3748 states to 3748 states and 9506 transitions. [2021-06-05 03:49:33,741 INFO L78 Accepts]: Start accepts. Automaton has 3748 states and 9506 transitions. Word has length 41 [2021-06-05 03:49:33,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:49:33,741 INFO L482 AbstractCegarLoop]: Abstraction has 3748 states and 9506 transitions. [2021-06-05 03:49:33,741 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:33,741 INFO L276 IsEmpty]: Start isEmpty. Operand 3748 states and 9506 transitions. [2021-06-05 03:49:33,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 03:49:33,743 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:49:33,743 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:49:33,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2021-06-05 03:49:33,944 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:49:33,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:49:33,944 INFO L82 PathProgramCache]: Analyzing trace with hash -1052717447, now seen corresponding path program 23 times [2021-06-05 03:49:33,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:49:33,944 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643089815] [2021-06-05 03:49:33,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:49:33,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:33,992 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 43 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:49:33,992 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:49:33,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643089815] [2021-06-05 03:49:33,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643089815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:33,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546557133] [2021-06-05 03:49:33,993 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:34,017 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 03:49:34,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:49:34,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 03:49:34,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:49:34,122 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 44 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:49:34,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546557133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:34,122 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:49:34,123 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12] total 15 [2021-06-05 03:49:34,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820311554] [2021-06-05 03:49:34,123 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:49:34,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:49:34,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:49:34,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:49:34,123 INFO L87 Difference]: Start difference. First operand 3748 states and 9506 transitions. Second operand has 16 states, 16 states have (on average 3.375) internal successors, (54), 15 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:34,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:49:34,332 INFO L93 Difference]: Finished difference Result 5032 states and 12054 transitions. [2021-06-05 03:49:34,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 03:49:34,332 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 15 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 03:49:34,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:49:34,336 INFO L225 Difference]: With dead ends: 5032 [2021-06-05 03:49:34,336 INFO L226 Difference]: Without dead ends: 5032 [2021-06-05 03:49:34,336 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 148.4ms TimeCoverageRelationStatistics Valid=148, Invalid=272, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:49:34,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5032 states. [2021-06-05 03:49:34,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5032 to 3584. [2021-06-05 03:49:34,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3584 states, 3583 states have (on average 2.521629919062238) internal successors, (9035), 3583 states have internal predecessors, (9035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:34,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3584 states to 3584 states and 9035 transitions. [2021-06-05 03:49:34,385 INFO L78 Accepts]: Start accepts. Automaton has 3584 states and 9035 transitions. Word has length 41 [2021-06-05 03:49:34,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:49:34,385 INFO L482 AbstractCegarLoop]: Abstraction has 3584 states and 9035 transitions. [2021-06-05 03:49:34,385 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 15 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:34,385 INFO L276 IsEmpty]: Start isEmpty. Operand 3584 states and 9035 transitions. [2021-06-05 03:49:34,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 03:49:34,387 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:49:34,387 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:49:34,587 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2021-06-05 03:49:34,588 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:49:34,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:49:34,588 INFO L82 PathProgramCache]: Analyzing trace with hash -1317611251, now seen corresponding path program 52 times [2021-06-05 03:49:34,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:49:34,588 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465057947] [2021-06-05 03:49:34,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:49:34,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:34,638 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 30 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:49:34,638 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:49:34,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465057947] [2021-06-05 03:49:34,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465057947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:34,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055316996] [2021-06-05 03:49:34,638 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:34,661 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:49:34,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:49:34,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 03:49:34,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:49:34,713 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 30 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:49:34,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055316996] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:34,713 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:49:34,714 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 03:49:34,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758479336] [2021-06-05 03:49:34,714 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 03:49:34,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:49:34,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 03:49:34,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-05 03:49:34,714 INFO L87 Difference]: Start difference. First operand 3584 states and 9035 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:34,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:49:34,851 INFO L93 Difference]: Finished difference Result 4100 states and 9963 transitions. [2021-06-05 03:49:34,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 03:49:34,852 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 03:49:34,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:49:34,855 INFO L225 Difference]: With dead ends: 4100 [2021-06-05 03:49:34,855 INFO L226 Difference]: Without dead ends: 4082 [2021-06-05 03:49:34,855 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 66.7ms TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:49:34,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4082 states. [2021-06-05 03:49:34,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4082 to 3584. [2021-06-05 03:49:34,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3584 states, 3583 states have (on average 2.520234440413062) internal successors, (9030), 3583 states have internal predecessors, (9030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:34,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3584 states to 3584 states and 9030 transitions. [2021-06-05 03:49:34,888 INFO L78 Accepts]: Start accepts. Automaton has 3584 states and 9030 transitions. Word has length 41 [2021-06-05 03:49:34,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:49:34,888 INFO L482 AbstractCegarLoop]: Abstraction has 3584 states and 9030 transitions. [2021-06-05 03:49:34,888 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:34,888 INFO L276 IsEmpty]: Start isEmpty. Operand 3584 states and 9030 transitions. [2021-06-05 03:49:34,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 03:49:34,891 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:49:34,891 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:49:35,091 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2021-06-05 03:49:35,091 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:49:35,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:49:35,091 INFO L82 PathProgramCache]: Analyzing trace with hash 1869360074, now seen corresponding path program 24 times [2021-06-05 03:49:35,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:49:35,092 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504596137] [2021-06-05 03:49:35,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:49:35,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:35,147 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 6 proven. 57 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:49:35,147 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:49:35,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504596137] [2021-06-05 03:49:35,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504596137] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:35,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876292347] [2021-06-05 03:49:35,147 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:35,174 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-05 03:49:35,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:49:35,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 03:49:35,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:49:35,228 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 58 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:49:35,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876292347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:35,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:49:35,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 03:49:35,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294323988] [2021-06-05 03:49:35,229 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 03:49:35,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:49:35,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 03:49:35,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-06-05 03:49:35,229 INFO L87 Difference]: Start difference. First operand 3584 states and 9030 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:35,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:49:35,450 INFO L93 Difference]: Finished difference Result 4419 states and 10697 transitions. [2021-06-05 03:49:35,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 03:49:35,451 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 03:49:35,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:49:35,455 INFO L225 Difference]: With dead ends: 4419 [2021-06-05 03:49:35,455 INFO L226 Difference]: Without dead ends: 4397 [2021-06-05 03:49:35,455 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 76.3ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:49:35,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4397 states. [2021-06-05 03:49:35,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4397 to 3612. [2021-06-05 03:49:35,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3612 states, 3611 states have (on average 2.5206314040432014) internal successors, (9102), 3611 states have internal predecessors, (9102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:35,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3612 states to 3612 states and 9102 transitions. [2021-06-05 03:49:35,492 INFO L78 Accepts]: Start accepts. Automaton has 3612 states and 9102 transitions. Word has length 41 [2021-06-05 03:49:35,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:49:35,492 INFO L482 AbstractCegarLoop]: Abstraction has 3612 states and 9102 transitions. [2021-06-05 03:49:35,492 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:35,492 INFO L276 IsEmpty]: Start isEmpty. Operand 3612 states and 9102 transitions. [2021-06-05 03:49:35,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 03:49:35,495 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:49:35,495 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:49:35,695 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable239 [2021-06-05 03:49:35,695 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:49:35,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:49:35,696 INFO L82 PathProgramCache]: Analyzing trace with hash -925274230, now seen corresponding path program 53 times [2021-06-05 03:49:35,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:49:35,696 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608560751] [2021-06-05 03:49:35,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:49:35,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:35,748 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 14 proven. 49 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:49:35,748 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:49:35,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608560751] [2021-06-05 03:49:35,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608560751] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:35,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327101125] [2021-06-05 03:49:35,749 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:35,774 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-05 03:49:35,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:49:35,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 03:49:35,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:49:35,847 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 9 proven. 54 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:49:35,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327101125] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:35,848 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:49:35,848 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-06-05 03:49:35,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997455088] [2021-06-05 03:49:35,848 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 03:49:35,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:49:35,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 03:49:35,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-06-05 03:49:35,848 INFO L87 Difference]: Start difference. First operand 3612 states and 9102 transitions. Second operand has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:36,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:49:36,160 INFO L93 Difference]: Finished difference Result 4113 states and 10023 transitions. [2021-06-05 03:49:36,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 03:49:36,161 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 03:49:36,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:49:36,164 INFO L225 Difference]: With dead ends: 4113 [2021-06-05 03:49:36,164 INFO L226 Difference]: Without dead ends: 4057 [2021-06-05 03:49:36,165 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 83.7ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:49:36,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4057 states. [2021-06-05 03:49:36,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4057 to 3639. [2021-06-05 03:49:36,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3639 states, 3638 states have (on average 2.51456844420011) internal successors, (9148), 3638 states have internal predecessors, (9148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:36,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3639 states to 3639 states and 9148 transitions. [2021-06-05 03:49:36,197 INFO L78 Accepts]: Start accepts. Automaton has 3639 states and 9148 transitions. Word has length 41 [2021-06-05 03:49:36,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:49:36,198 INFO L482 AbstractCegarLoop]: Abstraction has 3639 states and 9148 transitions. [2021-06-05 03:49:36,198 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:36,198 INFO L276 IsEmpty]: Start isEmpty. Operand 3639 states and 9148 transitions. [2021-06-05 03:49:36,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 03:49:36,200 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:49:36,200 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:49:36,401 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:36,401 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:49:36,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:49:36,401 INFO L82 PathProgramCache]: Analyzing trace with hash -1538810410, now seen corresponding path program 54 times [2021-06-05 03:49:36,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:49:36,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813398703] [2021-06-05 03:49:36,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:49:36,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:36,456 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 11 proven. 50 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 03:49:36,456 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:49:36,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813398703] [2021-06-05 03:49:36,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813398703] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:36,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262896253] [2021-06-05 03:49:36,457 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:36,486 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-05 03:49:36,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:49:36,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 03:49:36,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:49:36,542 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 03:49:36,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262896253] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:36,542 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:49:36,542 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 03:49:36,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757904790] [2021-06-05 03:49:36,542 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 03:49:36,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:49:36,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 03:49:36,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-06-05 03:49:36,543 INFO L87 Difference]: Start difference. First operand 3639 states and 9148 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:36,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:49:36,777 INFO L93 Difference]: Finished difference Result 4375 states and 10599 transitions. [2021-06-05 03:49:36,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 03:49:36,777 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 03:49:36,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:49:36,781 INFO L225 Difference]: With dead ends: 4375 [2021-06-05 03:49:36,781 INFO L226 Difference]: Without dead ends: 4363 [2021-06-05 03:49:36,782 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 78.0ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:49:36,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4363 states. [2021-06-05 03:49:36,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4363 to 3649. [2021-06-05 03:49:36,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3649 states, 3648 states have (on average 2.513157894736842) internal successors, (9168), 3648 states have internal predecessors, (9168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:36,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3649 states to 3649 states and 9168 transitions. [2021-06-05 03:49:36,817 INFO L78 Accepts]: Start accepts. Automaton has 3649 states and 9168 transitions. Word has length 41 [2021-06-05 03:49:36,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:49:36,817 INFO L482 AbstractCegarLoop]: Abstraction has 3649 states and 9168 transitions. [2021-06-05 03:49:36,817 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:36,817 INFO L276 IsEmpty]: Start isEmpty. Operand 3649 states and 9168 transitions. [2021-06-05 03:49:36,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 03:49:36,820 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:49:36,820 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:49:37,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:37,024 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:49:37,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:49:37,025 INFO L82 PathProgramCache]: Analyzing trace with hash -1696109897, now seen corresponding path program 25 times [2021-06-05 03:49:37,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:49:37,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39119036] [2021-06-05 03:49:37,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:49:37,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:37,065 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 40 proven. 26 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:49:37,065 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:49:37,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39119036] [2021-06-05 03:49:37,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39119036] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:37,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987179630] [2021-06-05 03:49:37,065 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:37,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:37,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 03:49:37,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:49:37,144 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 42 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:49:37,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987179630] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:37,144 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:49:37,145 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 9 [2021-06-05 03:49:37,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577237245] [2021-06-05 03:49:37,145 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 03:49:37,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:49:37,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 03:49:37,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-06-05 03:49:37,145 INFO L87 Difference]: Start difference. First operand 3649 states and 9168 transitions. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:37,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:49:37,266 INFO L93 Difference]: Finished difference Result 4653 states and 11200 transitions. [2021-06-05 03:49:37,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 03:49:37,266 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 03:49:37,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:49:37,271 INFO L225 Difference]: With dead ends: 4653 [2021-06-05 03:49:37,271 INFO L226 Difference]: Without dead ends: 4643 [2021-06-05 03:49:37,271 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 56.5ms TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:49:37,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4643 states. [2021-06-05 03:49:37,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4643 to 3759. [2021-06-05 03:49:37,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3759 states, 3758 states have (on average 2.5172964342735495) internal successors, (9460), 3758 states have internal predecessors, (9460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:37,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3759 states to 3759 states and 9460 transitions. [2021-06-05 03:49:37,312 INFO L78 Accepts]: Start accepts. Automaton has 3759 states and 9460 transitions. Word has length 41 [2021-06-05 03:49:37,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:49:37,312 INFO L482 AbstractCegarLoop]: Abstraction has 3759 states and 9460 transitions. [2021-06-05 03:49:37,312 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:37,312 INFO L276 IsEmpty]: Start isEmpty. Operand 3759 states and 9460 transitions. [2021-06-05 03:49:37,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 03:49:37,315 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:49:37,315 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:49:37,515 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:37,515 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:49:37,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:49:37,515 INFO L82 PathProgramCache]: Analyzing trace with hash 1107799383, now seen corresponding path program 55 times [2021-06-05 03:49:37,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:49:37,516 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681683393] [2021-06-05 03:49:37,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:49:37,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:37,557 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 22 proven. 43 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:49:37,557 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:49:37,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681683393] [2021-06-05 03:49:37,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681683393] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:37,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761302087] [2021-06-05 03:49:37,558 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:37,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:37,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 03:49:37,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:49:37,632 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 22 proven. 43 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:49:37,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761302087] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:37,633 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:49:37,633 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-05 03:49:37,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236720186] [2021-06-05 03:49:37,633 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 03:49:37,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:49:37,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 03:49:37,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-06-05 03:49:37,633 INFO L87 Difference]: Start difference. First operand 3759 states and 9460 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:37,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:49:37,770 INFO L93 Difference]: Finished difference Result 4425 states and 10642 transitions. [2021-06-05 03:49:37,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 03:49:37,770 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 03:49:37,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:49:37,774 INFO L225 Difference]: With dead ends: 4425 [2021-06-05 03:49:37,774 INFO L226 Difference]: Without dead ends: 4407 [2021-06-05 03:49:37,774 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 50.4ms TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:49:37,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4407 states. [2021-06-05 03:49:37,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4407 to 3746. [2021-06-05 03:49:37,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3746 states, 3745 states have (on average 2.5124165554072095) internal successors, (9409), 3745 states have internal predecessors, (9409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:37,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3746 states to 3746 states and 9409 transitions. [2021-06-05 03:49:37,808 INFO L78 Accepts]: Start accepts. Automaton has 3746 states and 9409 transitions. Word has length 41 [2021-06-05 03:49:37,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:49:37,808 INFO L482 AbstractCegarLoop]: Abstraction has 3746 states and 9409 transitions. [2021-06-05 03:49:37,809 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:37,809 INFO L276 IsEmpty]: Start isEmpty. Operand 3746 states and 9409 transitions. [2021-06-05 03:49:37,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 03:49:37,811 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:49:37,811 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:49:38,011 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable245,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:38,012 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:49:38,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:49:38,012 INFO L82 PathProgramCache]: Analyzing trace with hash 603106924, now seen corresponding path program 56 times [2021-06-05 03:49:38,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:49:38,012 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089517036] [2021-06-05 03:49:38,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:49:38,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:38,064 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 11 proven. 52 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:49:38,064 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:49:38,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089517036] [2021-06-05 03:49:38,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089517036] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:38,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308196649] [2021-06-05 03:49:38,064 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:38,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:49:38,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:49:38,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 03:49:38,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:49:38,141 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 53 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:49:38,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308196649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:38,142 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:49:38,142 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 03:49:38,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118966894] [2021-06-05 03:49:38,142 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 03:49:38,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:49:38,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 03:49:38,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-05 03:49:38,142 INFO L87 Difference]: Start difference. First operand 3746 states and 9409 transitions. Second operand has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:38,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:49:38,452 INFO L93 Difference]: Finished difference Result 5163 states and 12313 transitions. [2021-06-05 03:49:38,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 03:49:38,453 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 03:49:38,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:49:38,457 INFO L225 Difference]: With dead ends: 5163 [2021-06-05 03:49:38,457 INFO L226 Difference]: Without dead ends: 5121 [2021-06-05 03:49:38,457 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 111.0ms TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:49:38,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5121 states. [2021-06-05 03:49:38,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5121 to 3767. [2021-06-05 03:49:38,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3767 states, 3766 states have (on average 2.5132766861391396) internal successors, (9465), 3766 states have internal predecessors, (9465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:38,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3767 states to 3767 states and 9465 transitions. [2021-06-05 03:49:38,495 INFO L78 Accepts]: Start accepts. Automaton has 3767 states and 9465 transitions. Word has length 41 [2021-06-05 03:49:38,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:49:38,495 INFO L482 AbstractCegarLoop]: Abstraction has 3767 states and 9465 transitions. [2021-06-05 03:49:38,495 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:38,495 INFO L276 IsEmpty]: Start isEmpty. Operand 3767 states and 9465 transitions. [2021-06-05 03:49:38,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 03:49:38,498 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:49:38,498 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:49:38,698 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable248 [2021-06-05 03:49:38,698 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:49:38,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:49:38,698 INFO L82 PathProgramCache]: Analyzing trace with hash 2135666033, now seen corresponding path program 57 times [2021-06-05 03:49:38,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:49:38,698 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695102864] [2021-06-05 03:49:38,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:49:38,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:38,749 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 21 proven. 45 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:49:38,749 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:49:38,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695102864] [2021-06-05 03:49:38,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695102864] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:38,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147188498] [2021-06-05 03:49:38,749 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:38,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 03:49:38,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:49:38,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 03:49:38,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:49:38,827 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 21 proven. 45 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:49:38,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147188498] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:38,827 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:49:38,827 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 03:49:38,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576335573] [2021-06-05 03:49:38,827 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 03:49:38,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:49:38,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 03:49:38,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-05 03:49:38,828 INFO L87 Difference]: Start difference. First operand 3767 states and 9465 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:38,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:49:38,956 INFO L93 Difference]: Finished difference Result 4453 states and 10682 transitions. [2021-06-05 03:49:38,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 03:49:38,956 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 03:49:38,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:49:38,960 INFO L225 Difference]: With dead ends: 4453 [2021-06-05 03:49:38,960 INFO L226 Difference]: Without dead ends: 4429 [2021-06-05 03:49:38,960 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 58.3ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:49:38,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4429 states. [2021-06-05 03:49:38,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4429 to 3631. [2021-06-05 03:49:38,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3631 states, 3630 states have (on average 2.4991735537190083) internal successors, (9072), 3630 states have internal predecessors, (9072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:38,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3631 states to 3631 states and 9072 transitions. [2021-06-05 03:49:38,997 INFO L78 Accepts]: Start accepts. Automaton has 3631 states and 9072 transitions. Word has length 41 [2021-06-05 03:49:38,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:49:38,997 INFO L482 AbstractCegarLoop]: Abstraction has 3631 states and 9072 transitions. [2021-06-05 03:49:38,997 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:38,997 INFO L276 IsEmpty]: Start isEmpty. Operand 3631 states and 9072 transitions. [2021-06-05 03:49:39,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 03:49:39,000 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:49:39,000 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:49:39,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable249 [2021-06-05 03:49:39,200 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:49:39,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:49:39,201 INFO L82 PathProgramCache]: Analyzing trace with hash 757943458, now seen corresponding path program 58 times [2021-06-05 03:49:39,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:49:39,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767864428] [2021-06-05 03:49:39,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:49:39,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:39,260 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:49:39,260 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:49:39,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767864428] [2021-06-05 03:49:39,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767864428] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:39,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520019397] [2021-06-05 03:49:39,260 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:39,282 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:49:39,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:49:39,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 03:49:39,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:49:39,336 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:49:39,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520019397] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:39,336 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:49:39,336 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 03:49:39,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565146335] [2021-06-05 03:49:39,336 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 03:49:39,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:49:39,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 03:49:39,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-05 03:49:39,337 INFO L87 Difference]: Start difference. First operand 3631 states and 9072 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:39,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:49:39,631 INFO L93 Difference]: Finished difference Result 4939 states and 11659 transitions. [2021-06-05 03:49:39,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 03:49:39,632 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 03:49:39,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:49:39,636 INFO L225 Difference]: With dead ends: 4939 [2021-06-05 03:49:39,636 INFO L226 Difference]: Without dead ends: 4885 [2021-06-05 03:49:39,636 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 123.0ms TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-06-05 03:49:39,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4885 states. [2021-06-05 03:49:39,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4885 to 3618. [2021-06-05 03:49:39,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3618 states, 3617 states have (on average 2.493779375172795) internal successors, (9020), 3617 states have internal predecessors, (9020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:39,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3618 states to 3618 states and 9020 transitions. [2021-06-05 03:49:39,670 INFO L78 Accepts]: Start accepts. Automaton has 3618 states and 9020 transitions. Word has length 41 [2021-06-05 03:49:39,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:49:39,670 INFO L482 AbstractCegarLoop]: Abstraction has 3618 states and 9020 transitions. [2021-06-05 03:49:39,670 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:39,670 INFO L276 IsEmpty]: Start isEmpty. Operand 3618 states and 9020 transitions. [2021-06-05 03:49:39,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 03:49:39,673 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:49:39,673 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:49:39,873 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:39,873 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:49:39,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:49:39,873 INFO L82 PathProgramCache]: Analyzing trace with hash -101998469, now seen corresponding path program 26 times [2021-06-05 03:49:39,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:49:39,874 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906204733] [2021-06-05 03:49:39,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:49:39,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:39,915 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 52 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:49:39,915 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:49:39,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906204733] [2021-06-05 03:49:39,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906204733] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:39,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138946634] [2021-06-05 03:49:39,915 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:39,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:49:39,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:49:39,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 03:49:39,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:49:39,995 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 53 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:49:39,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138946634] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:39,996 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:49:39,996 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 9 [2021-06-05 03:49:39,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103639325] [2021-06-05 03:49:39,996 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 03:49:39,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:49:39,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 03:49:39,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-06-05 03:49:39,996 INFO L87 Difference]: Start difference. First operand 3618 states and 9020 transitions. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:40,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:49:40,168 INFO L93 Difference]: Finished difference Result 5763 states and 13661 transitions. [2021-06-05 03:49:40,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 03:49:40,169 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 03:49:40,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:49:40,175 INFO L225 Difference]: With dead ends: 5763 [2021-06-05 03:49:40,175 INFO L226 Difference]: Without dead ends: 5763 [2021-06-05 03:49:40,175 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 61.0ms TimeCoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:49:40,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5763 states. [2021-06-05 03:49:40,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5763 to 3703. [2021-06-05 03:49:40,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3703 states, 3702 states have (on average 2.5062128579146408) internal successors, (9278), 3702 states have internal predecessors, (9278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:40,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3703 states to 3703 states and 9278 transitions. [2021-06-05 03:49:40,220 INFO L78 Accepts]: Start accepts. Automaton has 3703 states and 9278 transitions. Word has length 41 [2021-06-05 03:49:40,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:49:40,220 INFO L482 AbstractCegarLoop]: Abstraction has 3703 states and 9278 transitions. [2021-06-05 03:49:40,220 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:40,220 INFO L276 IsEmpty]: Start isEmpty. Operand 3703 states and 9278 transitions. [2021-06-05 03:49:40,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 03:49:40,222 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:49:40,222 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:49:40,423 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable254,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:40,423 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:49:40,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:49:40,423 INFO L82 PathProgramCache]: Analyzing trace with hash -1739570925, now seen corresponding path program 27 times [2021-06-05 03:49:40,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:49:40,423 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018972040] [2021-06-05 03:49:40,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:49:40,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:40,484 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 51 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:49:40,484 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:49:40,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018972040] [2021-06-05 03:49:40,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018972040] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:40,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025761283] [2021-06-05 03:49:40,485 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:40,510 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-05 03:49:40,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:49:40,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 03:49:40,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:49:40,568 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 52 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:49:40,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025761283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:40,569 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:49:40,569 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 10 [2021-06-05 03:49:40,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630110220] [2021-06-05 03:49:40,569 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 03:49:40,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:49:40,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 03:49:40,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 03:49:40,569 INFO L87 Difference]: Start difference. First operand 3703 states and 9278 transitions. Second operand has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:40,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:49:40,750 INFO L93 Difference]: Finished difference Result 5686 states and 13483 transitions. [2021-06-05 03:49:40,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 03:49:40,751 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 03:49:40,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:49:40,755 INFO L225 Difference]: With dead ends: 5686 [2021-06-05 03:49:40,755 INFO L226 Difference]: Without dead ends: 5686 [2021-06-05 03:49:40,755 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 79.8ms TimeCoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:49:40,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5686 states. [2021-06-05 03:49:40,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5686 to 3719. [2021-06-05 03:49:40,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3719 states, 3718 states have (on average 2.5080688542227003) internal successors, (9325), 3718 states have internal predecessors, (9325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:40,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3719 states to 3719 states and 9325 transitions. [2021-06-05 03:49:40,796 INFO L78 Accepts]: Start accepts. Automaton has 3719 states and 9325 transitions. Word has length 41 [2021-06-05 03:49:40,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:49:40,796 INFO L482 AbstractCegarLoop]: Abstraction has 3719 states and 9325 transitions. [2021-06-05 03:49:40,796 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:40,796 INFO L276 IsEmpty]: Start isEmpty. Operand 3719 states and 9325 transitions. [2021-06-05 03:49:40,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 03:49:40,799 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:49:40,799 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:49:40,999 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2021-06-05 03:49:40,999 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:49:41,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:49:41,000 INFO L82 PathProgramCache]: Analyzing trace with hash 865401207, now seen corresponding path program 28 times [2021-06-05 03:49:41,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:49:41,000 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942442632] [2021-06-05 03:49:41,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:49:41,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:41,087 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 44 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:49:41,088 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:49:41,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942442632] [2021-06-05 03:49:41,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942442632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:41,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393083716] [2021-06-05 03:49:41,088 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:41,110 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:49:41,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:49:41,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 03:49:41,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:49:41,178 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 45 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:49:41,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393083716] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:41,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:49:41,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 11 [2021-06-05 03:49:41,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455249259] [2021-06-05 03:49:41,178 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 03:49:41,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:49:41,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 03:49:41,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:49:41,179 INFO L87 Difference]: Start difference. First operand 3719 states and 9325 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:41,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:49:41,371 INFO L93 Difference]: Finished difference Result 4882 states and 11625 transitions. [2021-06-05 03:49:41,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 03:49:41,372 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 03:49:41,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:49:41,376 INFO L225 Difference]: With dead ends: 4882 [2021-06-05 03:49:41,376 INFO L226 Difference]: Without dead ends: 4882 [2021-06-05 03:49:41,376 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 104.6ms TimeCoverageRelationStatistics Valid=103, Invalid=169, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:49:41,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4882 states. [2021-06-05 03:49:41,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4882 to 3551. [2021-06-05 03:49:41,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3551 states, 3550 states have (on average 2.507887323943662) internal successors, (8903), 3550 states have internal predecessors, (8903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:41,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3551 states to 3551 states and 8903 transitions. [2021-06-05 03:49:41,415 INFO L78 Accepts]: Start accepts. Automaton has 3551 states and 8903 transitions. Word has length 41 [2021-06-05 03:49:41,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:49:41,415 INFO L482 AbstractCegarLoop]: Abstraction has 3551 states and 8903 transitions. [2021-06-05 03:49:41,415 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:41,415 INFO L276 IsEmpty]: Start isEmpty. Operand 3551 states and 8903 transitions. [2021-06-05 03:49:41,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 03:49:41,418 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:49:41,418 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:49:41,618 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2021-06-05 03:49:41,618 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:49:41,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:49:41,618 INFO L82 PathProgramCache]: Analyzing trace with hash 1144546135, now seen corresponding path program 59 times [2021-06-05 03:49:41,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:49:41,619 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95677051] [2021-06-05 03:49:41,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:49:41,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:41,675 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 26 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:49:41,675 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:49:41,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95677051] [2021-06-05 03:49:41,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95677051] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:41,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414429773] [2021-06-05 03:49:41,675 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:41,699 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 03:49:41,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:49:41,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 03:49:41,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:49:41,771 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 27 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:49:41,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414429773] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:41,771 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:49:41,771 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 13 [2021-06-05 03:49:41,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606077705] [2021-06-05 03:49:41,771 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:49:41,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:49:41,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:49:41,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:49:41,771 INFO L87 Difference]: Start difference. First operand 3551 states and 8903 transitions. Second operand has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 13 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:41,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:49:41,988 INFO L93 Difference]: Finished difference Result 4193 states and 10086 transitions. [2021-06-05 03:49:41,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 03:49:41,989 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 13 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 03:49:41,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:49:41,992 INFO L225 Difference]: With dead ends: 4193 [2021-06-05 03:49:41,992 INFO L226 Difference]: Without dead ends: 4166 [2021-06-05 03:49:41,992 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 94.8ms TimeCoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2021-06-05 03:49:41,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4166 states. [2021-06-05 03:49:42,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4166 to 3551. [2021-06-05 03:49:42,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3551 states, 3550 states have (on average 2.507042253521127) internal successors, (8900), 3550 states have internal predecessors, (8900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:42,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3551 states to 3551 states and 8900 transitions. [2021-06-05 03:49:42,025 INFO L78 Accepts]: Start accepts. Automaton has 3551 states and 8900 transitions. Word has length 41 [2021-06-05 03:49:42,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:49:42,025 INFO L482 AbstractCegarLoop]: Abstraction has 3551 states and 8900 transitions. [2021-06-05 03:49:42,025 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 13 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:42,025 INFO L276 IsEmpty]: Start isEmpty. Operand 3551 states and 8900 transitions. [2021-06-05 03:49:42,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 03:49:42,027 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:49:42,027 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:49:42,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable257 [2021-06-05 03:49:42,228 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:49:42,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:49:42,228 INFO L82 PathProgramCache]: Analyzing trace with hash -245347661, now seen corresponding path program 60 times [2021-06-05 03:49:42,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:49:42,228 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539237971] [2021-06-05 03:49:42,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:49:42,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:42,269 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 24 proven. 39 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 03:49:42,269 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:49:42,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539237971] [2021-06-05 03:49:42,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539237971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:42,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661167213] [2021-06-05 03:49:42,269 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:42,295 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-05 03:49:42,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:49:42,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 03:49:42,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:49:42,348 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 24 proven. 39 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 03:49:42,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661167213] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:42,348 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:49:42,348 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-05 03:49:42,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568234582] [2021-06-05 03:49:42,348 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 03:49:42,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:49:42,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 03:49:42,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-06-05 03:49:42,348 INFO L87 Difference]: Start difference. First operand 3551 states and 8900 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:42,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:49:42,459 INFO L93 Difference]: Finished difference Result 4381 states and 10397 transitions. [2021-06-05 03:49:42,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 03:49:42,459 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 03:49:42,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:49:42,463 INFO L225 Difference]: With dead ends: 4381 [2021-06-05 03:49:42,463 INFO L226 Difference]: Without dead ends: 4363 [2021-06-05 03:49:42,463 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 51.2ms TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:49:42,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4363 states. [2021-06-05 03:49:42,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4363 to 3551. [2021-06-05 03:49:42,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3551 states, 3550 states have (on average 2.5019718309859154) internal successors, (8882), 3550 states have internal predecessors, (8882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:42,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3551 states to 3551 states and 8882 transitions. [2021-06-05 03:49:42,497 INFO L78 Accepts]: Start accepts. Automaton has 3551 states and 8882 transitions. Word has length 41 [2021-06-05 03:49:42,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:49:42,497 INFO L482 AbstractCegarLoop]: Abstraction has 3551 states and 8882 transitions. [2021-06-05 03:49:42,497 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:42,497 INFO L276 IsEmpty]: Start isEmpty. Operand 3551 states and 8882 transitions. [2021-06-05 03:49:42,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 03:49:42,500 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:49:42,500 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:49:42,700 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:42,700 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:49:42,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:49:42,701 INFO L82 PathProgramCache]: Analyzing trace with hash -1693347674, now seen corresponding path program 61 times [2021-06-05 03:49:42,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:49:42,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618612271] [2021-06-05 03:49:42,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:49:42,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:42,752 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 14 proven. 49 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:49:42,752 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:49:42,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618612271] [2021-06-05 03:49:42,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618612271] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:42,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598672718] [2021-06-05 03:49:42,753 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:42,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:42,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 03:49:42,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:49:42,841 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 9 proven. 54 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:49:42,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598672718] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:42,841 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:49:42,841 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-06-05 03:49:42,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898463369] [2021-06-05 03:49:42,842 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 03:49:42,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:49:42,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 03:49:42,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-06-05 03:49:42,842 INFO L87 Difference]: Start difference. First operand 3551 states and 8882 transitions. Second operand has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:43,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:49:43,173 INFO L93 Difference]: Finished difference Result 4355 states and 10366 transitions. [2021-06-05 03:49:43,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 03:49:43,173 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 03:49:43,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:49:43,177 INFO L225 Difference]: With dead ends: 4355 [2021-06-05 03:49:43,177 INFO L226 Difference]: Without dead ends: 4156 [2021-06-05 03:49:43,177 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 76.3ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:49:43,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4156 states. [2021-06-05 03:49:43,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4156 to 3529. [2021-06-05 03:49:43,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3529 states, 3528 states have (on average 2.484126984126984) internal successors, (8764), 3528 states have internal predecessors, (8764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:43,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3529 states to 3529 states and 8764 transitions. [2021-06-05 03:49:43,210 INFO L78 Accepts]: Start accepts. Automaton has 3529 states and 8764 transitions. Word has length 41 [2021-06-05 03:49:43,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:49:43,210 INFO L482 AbstractCegarLoop]: Abstraction has 3529 states and 8764 transitions. [2021-06-05 03:49:43,210 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:43,210 INFO L276 IsEmpty]: Start isEmpty. Operand 3529 states and 8764 transitions. [2021-06-05 03:49:43,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 03:49:43,212 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:49:43,213 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:49:43,428 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable265 [2021-06-05 03:49:43,428 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:49:43,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:49:43,428 INFO L82 PathProgramCache]: Analyzing trace with hash 1988083442, now seen corresponding path program 62 times [2021-06-05 03:49:43,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:49:43,428 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347397692] [2021-06-05 03:49:43,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:49:43,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:43,483 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 11 proven. 50 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 03:49:43,483 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:49:43,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347397692] [2021-06-05 03:49:43,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347397692] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:43,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326767798] [2021-06-05 03:49:43,484 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:43,507 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:49:43,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:49:43,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 03:49:43,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:49:43,564 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 03:49:43,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326767798] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:43,566 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:49:43,566 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 03:49:43,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365394926] [2021-06-05 03:49:43,566 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 03:49:43,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:49:43,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 03:49:43,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-06-05 03:49:43,567 INFO L87 Difference]: Start difference. First operand 3529 states and 8764 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:43,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:49:43,795 INFO L93 Difference]: Finished difference Result 4389 states and 10491 transitions. [2021-06-05 03:49:43,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 03:49:43,795 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 03:49:43,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:49:43,799 INFO L225 Difference]: With dead ends: 4389 [2021-06-05 03:49:43,799 INFO L226 Difference]: Without dead ends: 4377 [2021-06-05 03:49:43,799 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 77.9ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:49:43,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4377 states. [2021-06-05 03:49:43,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4377 to 3601. [2021-06-05 03:49:43,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3601 states, 3600 states have (on average 2.4819444444444443) internal successors, (8935), 3600 states have internal predecessors, (8935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:43,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3601 states to 3601 states and 8935 transitions. [2021-06-05 03:49:43,834 INFO L78 Accepts]: Start accepts. Automaton has 3601 states and 8935 transitions. Word has length 41 [2021-06-05 03:49:43,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:49:43,834 INFO L482 AbstractCegarLoop]: Abstraction has 3601 states and 8935 transitions. [2021-06-05 03:49:43,834 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:43,834 INFO L276 IsEmpty]: Start isEmpty. Operand 3601 states and 8935 transitions. [2021-06-05 03:49:43,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 03:49:43,836 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:49:43,836 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:49:44,037 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable266,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:44,037 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:49:44,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:49:44,037 INFO L82 PathProgramCache]: Analyzing trace with hash -164966520, now seen corresponding path program 63 times [2021-06-05 03:49:44,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:49:44,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570471207] [2021-06-05 03:49:44,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:49:44,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:44,090 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 11 proven. 52 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:49:44,090 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:49:44,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570471207] [2021-06-05 03:49:44,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570471207] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:44,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693713036] [2021-06-05 03:49:44,090 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:44,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-05 03:49:44,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:49:44,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 03:49:44,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:49:44,169 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 53 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:49:44,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693713036] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:44,170 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:49:44,170 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 03:49:44,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094294129] [2021-06-05 03:49:44,170 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 03:49:44,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:49:44,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 03:49:44,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-05 03:49:44,170 INFO L87 Difference]: Start difference. First operand 3601 states and 8935 transitions. Second operand has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:44,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:49:44,532 INFO L93 Difference]: Finished difference Result 5587 states and 13170 transitions. [2021-06-05 03:49:44,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 03:49:44,532 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 03:49:44,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:49:44,537 INFO L225 Difference]: With dead ends: 5587 [2021-06-05 03:49:44,537 INFO L226 Difference]: Without dead ends: 5533 [2021-06-05 03:49:44,538 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 127.3ms TimeCoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:49:44,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5533 states. [2021-06-05 03:49:44,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5533 to 3793. [2021-06-05 03:49:44,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3793 states, 3792 states have (on average 2.4897151898734178) internal successors, (9441), 3792 states have internal predecessors, (9441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:44,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3793 states to 3793 states and 9441 transitions. [2021-06-05 03:49:44,580 INFO L78 Accepts]: Start accepts. Automaton has 3793 states and 9441 transitions. Word has length 41 [2021-06-05 03:49:44,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:49:44,580 INFO L482 AbstractCegarLoop]: Abstraction has 3793 states and 9441 transitions. [2021-06-05 03:49:44,580 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:44,580 INFO L276 IsEmpty]: Start isEmpty. Operand 3793 states and 9441 transitions. [2021-06-05 03:49:44,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 03:49:44,583 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:49:44,583 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:49:44,783 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable267 [2021-06-05 03:49:44,783 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:49:44,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:49:44,784 INFO L82 PathProgramCache]: Analyzing trace with hash 1367592589, now seen corresponding path program 64 times [2021-06-05 03:49:44,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:49:44,784 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133249553] [2021-06-05 03:49:44,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:49:44,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:44,838 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 19 proven. 47 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:49:44,838 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:49:44,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133249553] [2021-06-05 03:49:44,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133249553] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:44,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810142422] [2021-06-05 03:49:44,839 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:44,861 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:49:44,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:49:44,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 03:49:44,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:49:44,921 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 19 proven. 47 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:49:44,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810142422] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:44,921 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:49:44,921 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 03:49:44,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961627720] [2021-06-05 03:49:44,922 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 03:49:44,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:49:44,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 03:49:44,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-05 03:49:44,922 INFO L87 Difference]: Start difference. First operand 3793 states and 9441 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:45,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:49:45,040 INFO L93 Difference]: Finished difference Result 4607 states and 10909 transitions. [2021-06-05 03:49:45,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 03:49:45,041 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 03:49:45,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:49:45,045 INFO L225 Difference]: With dead ends: 4607 [2021-06-05 03:49:45,045 INFO L226 Difference]: Without dead ends: 4583 [2021-06-05 03:49:45,045 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 59.0ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:49:45,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4583 states. [2021-06-05 03:49:45,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4583 to 3793. [2021-06-05 03:49:45,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3793 states, 3792 states have (on average 2.485495780590717) internal successors, (9425), 3792 states have internal predecessors, (9425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:45,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3793 states to 3793 states and 9425 transitions. [2021-06-05 03:49:45,082 INFO L78 Accepts]: Start accepts. Automaton has 3793 states and 9425 transitions. Word has length 41 [2021-06-05 03:49:45,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:49:45,082 INFO L482 AbstractCegarLoop]: Abstraction has 3793 states and 9425 transitions. [2021-06-05 03:49:45,082 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:45,082 INFO L276 IsEmpty]: Start isEmpty. Operand 3793 states and 9425 transitions. [2021-06-05 03:49:45,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 03:49:45,084 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:49:45,084 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:49:45,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable268 [2021-06-05 03:49:45,300 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:49:45,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:49:45,300 INFO L82 PathProgramCache]: Analyzing trace with hash -10129986, now seen corresponding path program 65 times [2021-06-05 03:49:45,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:49:45,300 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21955452] [2021-06-05 03:49:45,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:49:45,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:45,359 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 11 proven. 52 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:49:45,359 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:49:45,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21955452] [2021-06-05 03:49:45,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21955452] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:45,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670908171] [2021-06-05 03:49:45,359 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:45,384 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-05 03:49:45,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:49:45,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 03:49:45,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:49:45,440 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 53 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:49:45,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670908171] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:45,440 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:49:45,441 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 03:49:45,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605106599] [2021-06-05 03:49:45,441 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 03:49:45,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:49:45,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 03:49:45,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-05 03:49:45,441 INFO L87 Difference]: Start difference. First operand 3793 states and 9425 transitions. Second operand has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:45,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:49:45,902 INFO L93 Difference]: Finished difference Result 7022 states and 16378 transitions. [2021-06-05 03:49:45,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 03:49:45,902 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 03:49:45,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:49:45,908 INFO L225 Difference]: With dead ends: 7022 [2021-06-05 03:49:45,908 INFO L226 Difference]: Without dead ends: 6908 [2021-06-05 03:49:45,909 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 227.1ms TimeCoverageRelationStatistics Valid=165, Invalid=891, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 03:49:45,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6908 states. [2021-06-05 03:49:45,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6908 to 3954. [2021-06-05 03:49:45,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3954 states, 3953 states have (on average 2.489501644320769) internal successors, (9841), 3953 states have internal predecessors, (9841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:45,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3954 states to 3954 states and 9841 transitions. [2021-06-05 03:49:45,957 INFO L78 Accepts]: Start accepts. Automaton has 3954 states and 9841 transitions. Word has length 41 [2021-06-05 03:49:45,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:49:45,957 INFO L482 AbstractCegarLoop]: Abstraction has 3954 states and 9841 transitions. [2021-06-05 03:49:45,957 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:45,957 INFO L276 IsEmpty]: Start isEmpty. Operand 3954 states and 9841 transitions. [2021-06-05 03:49:45,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 03:49:45,959 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:49:45,959 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:49:46,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:46,161 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:49:46,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:49:46,161 INFO L82 PathProgramCache]: Analyzing trace with hash 376472691, now seen corresponding path program 66 times [2021-06-05 03:49:46,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:49:46,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747955751] [2021-06-05 03:49:46,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:49:46,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:46,217 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 20 proven. 46 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:49:46,217 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:49:46,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747955751] [2021-06-05 03:49:46,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747955751] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:46,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102427100] [2021-06-05 03:49:46,217 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:46,241 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 03:49:46,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:49:46,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 03:49:46,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:49:46,295 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 20 proven. 46 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:49:46,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102427100] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:46,295 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:49:46,295 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 03:49:46,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379440350] [2021-06-05 03:49:46,296 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 03:49:46,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:49:46,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 03:49:46,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-06-05 03:49:46,296 INFO L87 Difference]: Start difference. First operand 3954 states and 9841 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:46,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:49:46,441 INFO L93 Difference]: Finished difference Result 4805 states and 11375 transitions. [2021-06-05 03:49:46,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 03:49:46,441 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 03:49:46,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:49:46,445 INFO L225 Difference]: With dead ends: 4805 [2021-06-05 03:49:46,446 INFO L226 Difference]: Without dead ends: 4772 [2021-06-05 03:49:46,446 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 80.9ms TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:49:46,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4772 states. [2021-06-05 03:49:46,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4772 to 3796. [2021-06-05 03:49:46,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3796 states, 3795 states have (on average 2.477470355731225) internal successors, (9402), 3795 states have internal predecessors, (9402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:46,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3796 states to 3796 states and 9402 transitions. [2021-06-05 03:49:46,485 INFO L78 Accepts]: Start accepts. Automaton has 3796 states and 9402 transitions. Word has length 41 [2021-06-05 03:49:46,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:49:46,485 INFO L482 AbstractCegarLoop]: Abstraction has 3796 states and 9402 transitions. [2021-06-05 03:49:46,485 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:46,486 INFO L276 IsEmpty]: Start isEmpty. Operand 3796 states and 9402 transitions. [2021-06-05 03:49:46,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 03:49:46,488 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:49:46,488 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:49:46,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable273 [2021-06-05 03:49:46,689 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:49:46,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:49:46,689 INFO L82 PathProgramCache]: Analyzing trace with hash -69821496, now seen corresponding path program 67 times [2021-06-05 03:49:46,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:49:46,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828973542] [2021-06-05 03:49:46,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:49:46,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:46,757 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:49:46,757 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:49:46,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828973542] [2021-06-05 03:49:46,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828973542] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:46,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813718597] [2021-06-05 03:49:46,757 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:46,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:46,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 03:49:46,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:49:46,833 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:49:46,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813718597] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:46,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:49:46,833 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 03:49:46,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210013312] [2021-06-05 03:49:46,833 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 03:49:46,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:49:46,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 03:49:46,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:49:46,833 INFO L87 Difference]: Start difference. First operand 3796 states and 9402 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:47,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:49:47,232 INFO L93 Difference]: Finished difference Result 5143 states and 11987 transitions. [2021-06-05 03:49:47,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 03:49:47,232 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 03:49:47,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:49:47,237 INFO L225 Difference]: With dead ends: 5143 [2021-06-05 03:49:47,237 INFO L226 Difference]: Without dead ends: 4987 [2021-06-05 03:49:47,237 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 191.7ms TimeCoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2021-06-05 03:49:47,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4987 states. [2021-06-05 03:49:47,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4987 to 3332. [2021-06-05 03:49:47,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3332 states, 3331 states have (on average 2.4377063944761335) internal successors, (8120), 3331 states have internal predecessors, (8120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:47,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3332 states to 3332 states and 8120 transitions. [2021-06-05 03:49:47,271 INFO L78 Accepts]: Start accepts. Automaton has 3332 states and 8120 transitions. Word has length 41 [2021-06-05 03:49:47,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:49:47,271 INFO L482 AbstractCegarLoop]: Abstraction has 3332 states and 8120 transitions. [2021-06-05 03:49:47,271 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:47,271 INFO L276 IsEmpty]: Start isEmpty. Operand 3332 states and 8120 transitions. [2021-06-05 03:49:47,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 03:49:47,273 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:49:47,273 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:49:47,473 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable278 [2021-06-05 03:49:47,473 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:49:47,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:49:47,474 INFO L82 PathProgramCache]: Analyzing trace with hash -307883013, now seen corresponding path program 29 times [2021-06-05 03:49:47,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:49:47,474 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887372033] [2021-06-05 03:49:47,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:49:47,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:47,513 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 53 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:49:47,513 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:49:47,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887372033] [2021-06-05 03:49:47,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887372033] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:47,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517259944] [2021-06-05 03:49:47,514 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:47,541 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-05 03:49:47,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:49:47,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 03:49:47,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:49:47,621 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 54 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:49:47,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517259944] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:47,621 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:49:47,622 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 10 [2021-06-05 03:49:47,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434278131] [2021-06-05 03:49:47,622 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 03:49:47,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:49:47,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 03:49:47,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-06-05 03:49:47,622 INFO L87 Difference]: Start difference. First operand 3332 states and 8120 transitions. Second operand has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:47,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:49:47,773 INFO L93 Difference]: Finished difference Result 4368 states and 10283 transitions. [2021-06-05 03:49:47,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 03:49:47,773 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 03:49:47,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:49:47,777 INFO L225 Difference]: With dead ends: 4368 [2021-06-05 03:49:47,777 INFO L226 Difference]: Without dead ends: 4354 [2021-06-05 03:49:47,777 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 53.8ms TimeCoverageRelationStatistics Valid=64, Invalid=92, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:49:47,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4354 states. [2021-06-05 03:49:47,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4354 to 3443. [2021-06-05 03:49:47,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3443 states, 3442 states have (on average 2.4468332364904124) internal successors, (8422), 3442 states have internal predecessors, (8422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:47,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3443 states to 3443 states and 8422 transitions. [2021-06-05 03:49:47,810 INFO L78 Accepts]: Start accepts. Automaton has 3443 states and 8422 transitions. Word has length 41 [2021-06-05 03:49:47,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:49:47,810 INFO L482 AbstractCegarLoop]: Abstraction has 3443 states and 8422 transitions. [2021-06-05 03:49:47,810 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:47,811 INFO L276 IsEmpty]: Start isEmpty. Operand 3443 states and 8422 transitions. [2021-06-05 03:49:47,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 03:49:47,813 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:49:47,813 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:49:48,013 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable279 [2021-06-05 03:49:48,013 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:49:48,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:49:48,013 INFO L82 PathProgramCache]: Analyzing trace with hash -929763423, now seen corresponding path program 30 times [2021-06-05 03:49:48,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:49:48,014 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488397672] [2021-06-05 03:49:48,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:49:48,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:48,058 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 53 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:49:48,058 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:49:48,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488397672] [2021-06-05 03:49:48,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488397672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:48,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783898775] [2021-06-05 03:49:48,058 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:48,087 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-05 03:49:48,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:49:48,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 03:49:48,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:49:48,158 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 56 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:49:48,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783898775] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:48,158 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:49:48,158 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 10 [2021-06-05 03:49:48,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588086051] [2021-06-05 03:49:48,159 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 03:49:48,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:49:48,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 03:49:48,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-06-05 03:49:48,159 INFO L87 Difference]: Start difference. First operand 3443 states and 8422 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:48,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:49:48,385 INFO L93 Difference]: Finished difference Result 4338 states and 10163 transitions. [2021-06-05 03:49:48,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 03:49:48,385 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 03:49:48,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:49:48,389 INFO L225 Difference]: With dead ends: 4338 [2021-06-05 03:49:48,389 INFO L226 Difference]: Without dead ends: 4338 [2021-06-05 03:49:48,390 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 110.8ms TimeCoverageRelationStatistics Valid=113, Invalid=159, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:49:48,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4338 states. [2021-06-05 03:49:48,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4338 to 3179. [2021-06-05 03:49:48,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3179 states, 3178 states have (on average 2.4389553178099432) internal successors, (7751), 3178 states have internal predecessors, (7751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:48,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3179 states to 3179 states and 7751 transitions. [2021-06-05 03:49:48,421 INFO L78 Accepts]: Start accepts. Automaton has 3179 states and 7751 transitions. Word has length 41 [2021-06-05 03:49:48,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:49:48,421 INFO L482 AbstractCegarLoop]: Abstraction has 3179 states and 7751 transitions. [2021-06-05 03:49:48,421 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:48,422 INFO L276 IsEmpty]: Start isEmpty. Operand 3179 states and 7751 transitions. [2021-06-05 03:49:48,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 03:49:48,423 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:49:48,423 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:49:48,624 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable281,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:48,624 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:49:48,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:49:48,624 INFO L82 PathProgramCache]: Analyzing trace with hash 1823751373, now seen corresponding path program 68 times [2021-06-05 03:49:48,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:49:48,624 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902458098] [2021-06-05 03:49:48,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:49:48,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:48,692 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 28 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:49:48,692 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:49:48,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902458098] [2021-06-05 03:49:48,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902458098] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:48,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726559829] [2021-06-05 03:49:48,693 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:48,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:49:48,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:49:48,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 03:49:48,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:49:48,777 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 28 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:49:48,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726559829] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:48,778 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:49:48,778 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 03:49:48,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406017827] [2021-06-05 03:49:48,778 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 03:49:48,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:49:48,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 03:49:48,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:49:48,778 INFO L87 Difference]: Start difference. First operand 3179 states and 7751 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:48,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:49:48,964 INFO L93 Difference]: Finished difference Result 3775 states and 8829 transitions. [2021-06-05 03:49:48,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 03:49:48,965 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 03:49:48,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:49:48,967 INFO L225 Difference]: With dead ends: 3775 [2021-06-05 03:49:48,968 INFO L226 Difference]: Without dead ends: 3739 [2021-06-05 03:49:48,968 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 101.7ms TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:49:48,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3739 states. [2021-06-05 03:49:48,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3739 to 3188. [2021-06-05 03:49:48,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3188 states, 3187 states have (on average 2.4339504235958582) internal successors, (7757), 3187 states have internal predecessors, (7757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:48,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3188 states to 3188 states and 7757 transitions. [2021-06-05 03:49:48,996 INFO L78 Accepts]: Start accepts. Automaton has 3188 states and 7757 transitions. Word has length 41 [2021-06-05 03:49:48,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:49:48,996 INFO L482 AbstractCegarLoop]: Abstraction has 3188 states and 7757 transitions. [2021-06-05 03:49:48,996 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:48,996 INFO L276 IsEmpty]: Start isEmpty. Operand 3188 states and 7757 transitions. [2021-06-05 03:49:48,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 03:49:48,998 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:49:48,998 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:49:49,199 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:49,199 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:49:49,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:49:49,199 INFO L82 PathProgramCache]: Analyzing trace with hash 370314101, now seen corresponding path program 69 times [2021-06-05 03:49:49,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:49:49,200 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166321455] [2021-06-05 03:49:49,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:49:49,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:49,265 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 33 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:49:49,265 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:49:49,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166321455] [2021-06-05 03:49:49,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166321455] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:49,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441041273] [2021-06-05 03:49:49,265 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:49,290 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 03:49:49,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:49:49,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 03:49:49,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:49:49,355 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 33 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:49:49,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441041273] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:49,355 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:49:49,355 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 03:49:49,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46043894] [2021-06-05 03:49:49,355 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 03:49:49,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:49:49,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 03:49:49,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:49:49,356 INFO L87 Difference]: Start difference. First operand 3188 states and 7757 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:49,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:49:49,585 INFO L93 Difference]: Finished difference Result 4138 states and 9762 transitions. [2021-06-05 03:49:49,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 03:49:49,585 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 03:49:49,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:49:49,588 INFO L225 Difference]: With dead ends: 4138 [2021-06-05 03:49:49,588 INFO L226 Difference]: Without dead ends: 4138 [2021-06-05 03:49:49,588 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 113.5ms TimeCoverageRelationStatistics Valid=126, Invalid=216, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:49:49,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4138 states. [2021-06-05 03:49:49,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4138 to 3170. [2021-06-05 03:49:49,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3170 states, 3169 states have (on average 2.454717576522562) internal successors, (7779), 3169 states have internal predecessors, (7779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:49,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3170 states to 3170 states and 7779 transitions. [2021-06-05 03:49:49,618 INFO L78 Accepts]: Start accepts. Automaton has 3170 states and 7779 transitions. Word has length 41 [2021-06-05 03:49:49,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:49:49,618 INFO L482 AbstractCegarLoop]: Abstraction has 3170 states and 7779 transitions. [2021-06-05 03:49:49,618 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:49,618 INFO L276 IsEmpty]: Start isEmpty. Operand 3170 states and 7779 transitions. [2021-06-05 03:49:49,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 03:49:49,620 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:49:49,620 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:49:49,821 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable290 [2021-06-05 03:49:49,821 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:49:49,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:49:49,821 INFO L82 PathProgramCache]: Analyzing trace with hash 1062684898, now seen corresponding path program 31 times [2021-06-05 03:49:49,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:49:49,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827073098] [2021-06-05 03:49:49,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:49:49,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:49,888 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:49:49,888 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:49:49,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827073098] [2021-06-05 03:49:49,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827073098] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:49,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462588011] [2021-06-05 03:49:49,889 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:49,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:49,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 03:49:49,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:49:49,967 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:49:49,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462588011] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:49,967 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:49:49,967 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 03:49:49,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540885069] [2021-06-05 03:49:49,967 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 03:49:49,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:49:49,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 03:49:49,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:49:49,968 INFO L87 Difference]: Start difference. First operand 3170 states and 7779 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:50,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:49:50,256 INFO L93 Difference]: Finished difference Result 4257 states and 9988 transitions. [2021-06-05 03:49:50,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 03:49:50,256 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 03:49:50,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:49:50,259 INFO L225 Difference]: With dead ends: 4257 [2021-06-05 03:49:50,260 INFO L226 Difference]: Without dead ends: 4227 [2021-06-05 03:49:50,260 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 156.4ms TimeCoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2021-06-05 03:49:50,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4227 states. [2021-06-05 03:49:50,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4227 to 3157. [2021-06-05 03:49:50,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3157 states, 3156 states have (on average 2.459442332065906) internal successors, (7762), 3156 states have internal predecessors, (7762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:50,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3157 states to 3157 states and 7762 transitions. [2021-06-05 03:49:50,288 INFO L78 Accepts]: Start accepts. Automaton has 3157 states and 7762 transitions. Word has length 41 [2021-06-05 03:49:50,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:49:50,288 INFO L482 AbstractCegarLoop]: Abstraction has 3157 states and 7762 transitions. [2021-06-05 03:49:50,288 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:50,289 INFO L276 IsEmpty]: Start isEmpty. Operand 3157 states and 7762 transitions. [2021-06-05 03:49:50,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 03:49:50,290 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:49:50,290 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:49:50,491 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable291,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:50,491 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:49:50,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:49:50,491 INFO L82 PathProgramCache]: Analyzing trace with hash 900632802, now seen corresponding path program 70 times [2021-06-05 03:49:50,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:49:50,491 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289907830] [2021-06-05 03:49:50,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:49:50,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:50,567 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 12 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:49:50,567 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:49:50,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289907830] [2021-06-05 03:49:50,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289907830] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:50,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104708380] [2021-06-05 03:49:50,567 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:50,589 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:49:50,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:49:50,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 03:49:50,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:49:50,718 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 9 proven. 55 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:49:50,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104708380] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:50,718 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:49:50,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 03:49:50,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575243806] [2021-06-05 03:49:50,718 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 03:49:50,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:49:50,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 03:49:50,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:49:50,719 INFO L87 Difference]: Start difference. First operand 3157 states and 7762 transitions. Second operand has 15 states, 15 states have (on average 3.6) internal successors, (54), 14 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:51,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:49:51,053 INFO L93 Difference]: Finished difference Result 3218 states and 7858 transitions. [2021-06-05 03:49:51,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 03:49:51,053 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 14 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 03:49:51,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:49:51,056 INFO L225 Difference]: With dead ends: 3218 [2021-06-05 03:49:51,056 INFO L226 Difference]: Without dead ends: 3174 [2021-06-05 03:49:51,056 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 113.5ms TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:49:51,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3174 states. [2021-06-05 03:49:51,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3174 to 3157. [2021-06-05 03:49:51,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3157 states, 3156 states have (on average 2.45659062103929) internal successors, (7753), 3156 states have internal predecessors, (7753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:51,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3157 states to 3157 states and 7753 transitions. [2021-06-05 03:49:51,082 INFO L78 Accepts]: Start accepts. Automaton has 3157 states and 7753 transitions. Word has length 41 [2021-06-05 03:49:51,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:49:51,082 INFO L482 AbstractCegarLoop]: Abstraction has 3157 states and 7753 transitions. [2021-06-05 03:49:51,082 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 14 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:51,082 INFO L276 IsEmpty]: Start isEmpty. Operand 3157 states and 7753 transitions. [2021-06-05 03:49:51,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 03:49:51,084 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:49:51,084 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:49:51,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable292 [2021-06-05 03:49:51,284 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:49:51,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:49:51,284 INFO L82 PathProgramCache]: Analyzing trace with hash -514678441, now seen corresponding path program 71 times [2021-06-05 03:49:51,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:49:51,284 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323516736] [2021-06-05 03:49:51,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:49:51,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:51,340 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 31 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:49:51,340 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:49:51,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323516736] [2021-06-05 03:49:51,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323516736] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:51,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311357285] [2021-06-05 03:49:51,340 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:51,364 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 03:49:51,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:49:51,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 03:49:51,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:49:51,433 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 33 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:49:51,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311357285] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:51,433 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:49:51,433 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 12 [2021-06-05 03:49:51,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952498965] [2021-06-05 03:49:51,433 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 03:49:51,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:49:51,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 03:49:51,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:49:51,434 INFO L87 Difference]: Start difference. First operand 3157 states and 7753 transitions. Second operand has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:51,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:49:51,652 INFO L93 Difference]: Finished difference Result 4264 states and 10096 transitions. [2021-06-05 03:49:51,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 03:49:51,653 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 03:49:51,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:49:51,656 INFO L225 Difference]: With dead ends: 4264 [2021-06-05 03:49:51,656 INFO L226 Difference]: Without dead ends: 4264 [2021-06-05 03:49:51,656 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 99.8ms TimeCoverageRelationStatistics Valid=116, Invalid=190, Unknown=0, NotChecked=0, Total=306 [2021-06-05 03:49:51,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4264 states. [2021-06-05 03:49:51,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4264 to 3336. [2021-06-05 03:49:51,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3336 states, 3335 states have (on average 2.489055472263868) internal successors, (8301), 3335 states have internal predecessors, (8301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:51,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3336 states to 3336 states and 8301 transitions. [2021-06-05 03:49:51,689 INFO L78 Accepts]: Start accepts. Automaton has 3336 states and 8301 transitions. Word has length 41 [2021-06-05 03:49:51,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:49:51,689 INFO L482 AbstractCegarLoop]: Abstraction has 3336 states and 8301 transitions. [2021-06-05 03:49:51,689 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:51,689 INFO L276 IsEmpty]: Start isEmpty. Operand 3336 states and 8301 transitions. [2021-06-05 03:49:51,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 03:49:51,691 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:49:51,691 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:49:51,891 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable293,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:51,891 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:49:51,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:49:51,892 INFO L82 PathProgramCache]: Analyzing trace with hash 1038909258, now seen corresponding path program 32 times [2021-06-05 03:49:51,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:49:51,892 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813043835] [2021-06-05 03:49:51,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:49:51,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:51,951 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:49:51,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:49:51,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813043835] [2021-06-05 03:49:51,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813043835] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:51,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498911559] [2021-06-05 03:49:51,951 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:51,974 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:49:51,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:49:51,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 03:49:51,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:49:52,028 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:49:52,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498911559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:52,028 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:49:52,028 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 03:49:52,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536078347] [2021-06-05 03:49:52,028 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 03:49:52,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:49:52,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 03:49:52,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-05 03:49:52,028 INFO L87 Difference]: Start difference. First operand 3336 states and 8301 transitions. Second operand has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:52,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:49:52,314 INFO L93 Difference]: Finished difference Result 4243 states and 10191 transitions. [2021-06-05 03:49:52,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 03:49:52,314 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 03:49:52,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:49:52,317 INFO L225 Difference]: With dead ends: 4243 [2021-06-05 03:49:52,317 INFO L226 Difference]: Without dead ends: 4243 [2021-06-05 03:49:52,318 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 123.8ms TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-06-05 03:49:52,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4243 states. [2021-06-05 03:49:52,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4243 to 3327. [2021-06-05 03:49:52,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3327 states, 3326 states have (on average 2.495189416716777) internal successors, (8299), 3326 states have internal predecessors, (8299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:52,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3327 states to 3327 states and 8299 transitions. [2021-06-05 03:49:52,356 INFO L78 Accepts]: Start accepts. Automaton has 3327 states and 8299 transitions. Word has length 41 [2021-06-05 03:49:52,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:49:52,357 INFO L482 AbstractCegarLoop]: Abstraction has 3327 states and 8299 transitions. [2021-06-05 03:49:52,357 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:52,357 INFO L276 IsEmpty]: Start isEmpty. Operand 3327 states and 8299 transitions. [2021-06-05 03:49:52,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 03:49:52,359 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:49:52,359 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:49:52,559 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:52,559 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:49:52,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:49:52,560 INFO L82 PathProgramCache]: Analyzing trace with hash 862018314, now seen corresponding path program 72 times [2021-06-05 03:49:52,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:49:52,560 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203974384] [2021-06-05 03:49:52,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:49:52,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:52,626 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 12 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:49:52,626 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:49:52,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203974384] [2021-06-05 03:49:52,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203974384] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:52,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154680779] [2021-06-05 03:49:52,627 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:52,652 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 03:49:52,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:49:52,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 03:49:52,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:49:52,755 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 9 proven. 55 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:49:52,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154680779] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:52,755 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:49:52,755 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 03:49:52,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256932973] [2021-06-05 03:49:52,756 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 03:49:52,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:49:52,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 03:49:52,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:49:52,756 INFO L87 Difference]: Start difference. First operand 3327 states and 8299 transitions. Second operand has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:53,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:49:53,025 INFO L93 Difference]: Finished difference Result 3397 states and 8404 transitions. [2021-06-05 03:49:53,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 03:49:53,025 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 03:49:53,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:49:53,028 INFO L225 Difference]: With dead ends: 3397 [2021-06-05 03:49:53,028 INFO L226 Difference]: Without dead ends: 3365 [2021-06-05 03:49:53,028 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 95.9ms TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:49:53,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3365 states. [2021-06-05 03:49:53,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3365 to 3327. [2021-06-05 03:49:53,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3327 states, 3326 states have (on average 2.493385447985568) internal successors, (8293), 3326 states have internal predecessors, (8293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:53,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3327 states to 3327 states and 8293 transitions. [2021-06-05 03:49:53,056 INFO L78 Accepts]: Start accepts. Automaton has 3327 states and 8293 transitions. Word has length 41 [2021-06-05 03:49:53,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:49:53,056 INFO L482 AbstractCegarLoop]: Abstraction has 3327 states and 8293 transitions. [2021-06-05 03:49:53,056 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:53,056 INFO L276 IsEmpty]: Start isEmpty. Operand 3327 states and 8293 transitions. [2021-06-05 03:49:53,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 03:49:53,058 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:49:53,058 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:49:53,259 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable295,155 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:53,259 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:49:53,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:49:53,259 INFO L82 PathProgramCache]: Analyzing trace with hash 1554389111, now seen corresponding path program 33 times [2021-06-05 03:49:53,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:49:53,259 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886857817] [2021-06-05 03:49:53,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:49:53,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:53,313 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 28 proven. 38 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:49:53,313 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:49:53,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886857817] [2021-06-05 03:49:53,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886857817] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:53,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815908871] [2021-06-05 03:49:53,313 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:53,338 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 03:49:53,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:49:53,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 03:49:53,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:49:53,396 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 29 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:49:53,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815908871] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:53,396 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:49:53,396 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 11 [2021-06-05 03:49:53,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026512774] [2021-06-05 03:49:53,396 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 03:49:53,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:49:53,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 03:49:53,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:49:53,397 INFO L87 Difference]: Start difference. First operand 3327 states and 8293 transitions. Second operand has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:53,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:49:53,535 INFO L93 Difference]: Finished difference Result 3937 states and 9522 transitions. [2021-06-05 03:49:53,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 03:49:53,535 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 03:49:53,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:49:53,538 INFO L225 Difference]: With dead ends: 3937 [2021-06-05 03:49:53,538 INFO L226 Difference]: Without dead ends: 3909 [2021-06-05 03:49:53,539 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 72.5ms TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:49:53,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3909 states. [2021-06-05 03:49:53,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3909 to 3225. [2021-06-05 03:49:53,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3225 states, 3224 states have (on average 2.507754342431762) internal successors, (8085), 3224 states have internal predecessors, (8085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:53,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3225 states to 3225 states and 8085 transitions. [2021-06-05 03:49:53,567 INFO L78 Accepts]: Start accepts. Automaton has 3225 states and 8085 transitions. Word has length 41 [2021-06-05 03:49:53,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:49:53,567 INFO L482 AbstractCegarLoop]: Abstraction has 3225 states and 8085 transitions. [2021-06-05 03:49:53,567 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:53,567 INFO L276 IsEmpty]: Start isEmpty. Operand 3225 states and 8085 transitions. [2021-06-05 03:49:53,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 03:49:53,569 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:49:53,569 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:49:53,769 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable296,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:53,769 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:49:53,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:49:53,770 INFO L82 PathProgramCache]: Analyzing trace with hash -692902219, now seen corresponding path program 73 times [2021-06-05 03:49:53,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:49:53,770 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015759880] [2021-06-05 03:49:53,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:49:53,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:53,819 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 29 proven. 37 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:49:53,819 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:49:53,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015759880] [2021-06-05 03:49:53,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015759880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:53,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567277315] [2021-06-05 03:49:53,819 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:53,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:53,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 03:49:53,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:49:53,900 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 29 proven. 37 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:49:53,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567277315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:53,900 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:49:53,900 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 03:49:53,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524633399] [2021-06-05 03:49:53,901 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 03:49:53,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:49:53,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 03:49:53,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 03:49:53,901 INFO L87 Difference]: Start difference. First operand 3225 states and 8085 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:54,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:49:54,026 INFO L93 Difference]: Finished difference Result 4305 states and 10371 transitions. [2021-06-05 03:49:54,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 03:49:54,026 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 03:49:54,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:49:54,030 INFO L225 Difference]: With dead ends: 4305 [2021-06-05 03:49:54,030 INFO L226 Difference]: Without dead ends: 4305 [2021-06-05 03:49:54,030 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 61.8ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:49:54,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4305 states. [2021-06-05 03:49:54,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4305 to 3427. [2021-06-05 03:49:54,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3427 states, 3426 states have (on average 2.538237011091652) internal successors, (8696), 3426 states have internal predecessors, (8696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:54,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3427 states to 3427 states and 8696 transitions. [2021-06-05 03:49:54,063 INFO L78 Accepts]: Start accepts. Automaton has 3427 states and 8696 transitions. Word has length 41 [2021-06-05 03:49:54,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:49:54,063 INFO L482 AbstractCegarLoop]: Abstraction has 3427 states and 8696 transitions. [2021-06-05 03:49:54,063 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:54,063 INFO L276 IsEmpty]: Start isEmpty. Operand 3427 states and 8696 transitions. [2021-06-05 03:49:54,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 03:49:54,065 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:49:54,065 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:49:54,265 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable301 [2021-06-05 03:49:54,265 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:49:54,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:49:54,265 INFO L82 PathProgramCache]: Analyzing trace with hash -1463737886, now seen corresponding path program 34 times [2021-06-05 03:49:54,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:49:54,266 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137161685] [2021-06-05 03:49:54,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:49:54,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:54,318 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:49:54,318 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:49:54,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137161685] [2021-06-05 03:49:54,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137161685] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:54,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941992719] [2021-06-05 03:49:54,318 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:54,341 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:49:54,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:49:54,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 03:49:54,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:49:54,408 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:49:54,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941992719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:54,409 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:49:54,409 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 03:49:54,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858090249] [2021-06-05 03:49:54,409 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 03:49:54,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:49:54,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 03:49:54,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-05 03:49:54,409 INFO L87 Difference]: Start difference. First operand 3427 states and 8696 transitions. Second operand has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:54,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:49:54,640 INFO L93 Difference]: Finished difference Result 4051 states and 9977 transitions. [2021-06-05 03:49:54,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 03:49:54,641 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 03:49:54,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:49:54,644 INFO L225 Difference]: With dead ends: 4051 [2021-06-05 03:49:54,644 INFO L226 Difference]: Without dead ends: 4047 [2021-06-05 03:49:54,644 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 96.9ms TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:49:54,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4047 states. [2021-06-05 03:49:54,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4047 to 3315. [2021-06-05 03:49:54,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3315 states, 3314 states have (on average 2.55944477972239) internal successors, (8482), 3314 states have internal predecessors, (8482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:54,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3315 states to 3315 states and 8482 transitions. [2021-06-05 03:49:54,675 INFO L78 Accepts]: Start accepts. Automaton has 3315 states and 8482 transitions. Word has length 41 [2021-06-05 03:49:54,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:49:54,675 INFO L482 AbstractCegarLoop]: Abstraction has 3315 states and 8482 transitions. [2021-06-05 03:49:54,675 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:54,675 INFO L276 IsEmpty]: Start isEmpty. Operand 3315 states and 8482 transitions. [2021-06-05 03:49:54,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 03:49:54,677 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:49:54,677 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:49:54,877 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable302,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:54,877 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:49:54,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:49:54,878 INFO L82 PathProgramCache]: Analyzing trace with hash 1197933026, now seen corresponding path program 74 times [2021-06-05 03:49:54,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:49:54,878 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447052788] [2021-06-05 03:49:54,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:49:54,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:54,935 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 12 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:49:54,935 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:49:54,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447052788] [2021-06-05 03:49:54,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447052788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:54,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177502577] [2021-06-05 03:49:54,935 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:54,959 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:49:54,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:49:54,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 03:49:54,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:49:55,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 03:49:55,012 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 03:49:55,013 INFO L628 ElimStorePlain]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 03:49:55,013 INFO L518 ElimStorePlain]: Eliminatee B vanished before elimination [2021-06-05 03:49:55,014 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 03:49:55,014 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:19, output treesize:1 [2021-06-05 03:49:55,018 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 12 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:49:55,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177502577] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:55,018 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:49:55,019 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-05 03:49:55,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699878015] [2021-06-05 03:49:55,019 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 03:49:55,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:49:55,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 03:49:55,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-06-05 03:49:55,019 INFO L87 Difference]: Start difference. First operand 3315 states and 8482 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:55,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:49:55,127 INFO L93 Difference]: Finished difference Result 3335 states and 8513 transitions. [2021-06-05 03:49:55,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 03:49:55,127 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 03:49:55,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:49:55,130 INFO L225 Difference]: With dead ends: 3335 [2021-06-05 03:49:55,130 INFO L226 Difference]: Without dead ends: 3315 [2021-06-05 03:49:55,130 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 54.2ms TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-06-05 03:49:55,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3315 states. [2021-06-05 03:49:55,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3315 to 3315. [2021-06-05 03:49:55,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3315 states, 3314 states have (on average 2.5585395292697646) internal successors, (8479), 3314 states have internal predecessors, (8479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:55,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3315 states to 3315 states and 8479 transitions. [2021-06-05 03:49:55,160 INFO L78 Accepts]: Start accepts. Automaton has 3315 states and 8479 transitions. Word has length 41 [2021-06-05 03:49:55,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:49:55,160 INFO L482 AbstractCegarLoop]: Abstraction has 3315 states and 8479 transitions. [2021-06-05 03:49:55,160 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:55,160 INFO L276 IsEmpty]: Start isEmpty. Operand 3315 states and 8479 transitions. [2021-06-05 03:49:55,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 03:49:55,162 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:49:55,162 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:49:55,362 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable303 [2021-06-05 03:49:55,363 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:49:55,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:49:55,363 INFO L82 PathProgramCache]: Analyzing trace with hash -1045836265, now seen corresponding path program 75 times [2021-06-05 03:49:55,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:49:55,363 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722907966] [2021-06-05 03:49:55,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:49:55,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:55,414 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 27 proven. 39 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:49:55,414 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:49:55,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722907966] [2021-06-05 03:49:55,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722907966] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:55,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798035100] [2021-06-05 03:49:55,414 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:55,439 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 03:49:55,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:49:55,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 03:49:55,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:49:55,494 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 27 proven. 39 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:49:55,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798035100] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:55,494 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:49:55,494 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-05 03:49:55,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146938148] [2021-06-05 03:49:55,494 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 03:49:55,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:49:55,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 03:49:55,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-05 03:49:55,495 INFO L87 Difference]: Start difference. First operand 3315 states and 8479 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:55,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:49:55,596 INFO L93 Difference]: Finished difference Result 4538 states and 11042 transitions. [2021-06-05 03:49:55,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 03:49:55,596 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 03:49:55,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:49:55,600 INFO L225 Difference]: With dead ends: 4538 [2021-06-05 03:49:55,600 INFO L226 Difference]: Without dead ends: 4538 [2021-06-05 03:49:55,600 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 43.1ms TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2021-06-05 03:49:55,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4538 states. [2021-06-05 03:49:55,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4538 to 3547. [2021-06-05 03:49:55,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3547 states, 3546 states have (on average 2.586576424139876) internal successors, (9172), 3546 states have internal predecessors, (9172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:55,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3547 states to 3547 states and 9172 transitions. [2021-06-05 03:49:55,635 INFO L78 Accepts]: Start accepts. Automaton has 3547 states and 9172 transitions. Word has length 41 [2021-06-05 03:49:55,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:49:55,636 INFO L482 AbstractCegarLoop]: Abstraction has 3547 states and 9172 transitions. [2021-06-05 03:49:55,636 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:55,636 INFO L276 IsEmpty]: Start isEmpty. Operand 3547 states and 9172 transitions. [2021-06-05 03:49:55,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 03:49:55,638 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:49:55,638 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:49:55,838 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable304,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:55,838 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:49:55,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:49:55,838 INFO L82 PathProgramCache]: Analyzing trace with hash -1283897782, now seen corresponding path program 35 times [2021-06-05 03:49:55,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:49:55,838 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679339551] [2021-06-05 03:49:55,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:49:55,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:55,894 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:49:55,894 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:49:55,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679339551] [2021-06-05 03:49:55,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679339551] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:55,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981043299] [2021-06-05 03:49:55,894 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:55,919 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 03:49:55,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:49:55,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 03:49:55,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:49:55,973 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:49:55,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981043299] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:55,974 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:49:55,974 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 03:49:55,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857746048] [2021-06-05 03:49:55,974 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 03:49:55,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:49:55,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 03:49:55,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-06-05 03:49:55,974 INFO L87 Difference]: Start difference. First operand 3547 states and 9172 transitions. Second operand has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:56,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:49:56,194 INFO L93 Difference]: Finished difference Result 4055 states and 10165 transitions. [2021-06-05 03:49:56,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 03:49:56,195 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 03:49:56,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:49:56,198 INFO L225 Difference]: With dead ends: 4055 [2021-06-05 03:49:56,198 INFO L226 Difference]: Without dead ends: 4047 [2021-06-05 03:49:56,198 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 81.6ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:49:56,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4047 states. [2021-06-05 03:49:56,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4047 to 3606. [2021-06-05 03:49:56,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3606 states, 3605 states have (on average 2.582246879334258) internal successors, (9309), 3605 states have internal predecessors, (9309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:56,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3606 states to 3606 states and 9309 transitions. [2021-06-05 03:49:56,231 INFO L78 Accepts]: Start accepts. Automaton has 3606 states and 9309 transitions. Word has length 41 [2021-06-05 03:49:56,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:49:56,231 INFO L482 AbstractCegarLoop]: Abstraction has 3606 states and 9309 transitions. [2021-06-05 03:49:56,231 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:56,231 INFO L276 IsEmpty]: Start isEmpty. Operand 3606 states and 9309 transitions. [2021-06-05 03:49:56,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 03:49:56,233 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:49:56,233 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:49:56,433 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable305 [2021-06-05 03:49:56,434 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:49:56,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:49:56,434 INFO L82 PathProgramCache]: Analyzing trace with hash 1457372657, now seen corresponding path program 76 times [2021-06-05 03:49:56,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:49:56,434 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353901536] [2021-06-05 03:49:56,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:49:56,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:56,473 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 37 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:49:56,473 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:49:56,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353901536] [2021-06-05 03:49:56,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353901536] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:56,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626892514] [2021-06-05 03:49:56,474 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:56,498 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:49:56,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:49:56,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 03:49:56,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:49:56,549 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 37 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:49:56,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626892514] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:56,550 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:49:56,550 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-05 03:49:56,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964959544] [2021-06-05 03:49:56,550 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 03:49:56,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:49:56,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 03:49:56,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-05 03:49:56,550 INFO L87 Difference]: Start difference. First operand 3606 states and 9309 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:56,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:49:56,643 INFO L93 Difference]: Finished difference Result 4522 states and 10995 transitions. [2021-06-05 03:49:56,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 03:49:56,644 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 03:49:56,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:49:56,647 INFO L225 Difference]: With dead ends: 4522 [2021-06-05 03:49:56,647 INFO L226 Difference]: Without dead ends: 4519 [2021-06-05 03:49:56,647 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 36.4ms TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2021-06-05 03:49:56,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4519 states. [2021-06-05 03:49:56,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4519 to 3605. [2021-06-05 03:49:56,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3605 states, 3604 states have (on average 2.5812985571587124) internal successors, (9303), 3604 states have internal predecessors, (9303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:56,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3605 states to 3605 states and 9303 transitions. [2021-06-05 03:49:56,682 INFO L78 Accepts]: Start accepts. Automaton has 3605 states and 9303 transitions. Word has length 41 [2021-06-05 03:49:56,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:49:56,683 INFO L482 AbstractCegarLoop]: Abstraction has 3605 states and 9303 transitions. [2021-06-05 03:49:56,683 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:56,683 INFO L276 IsEmpty]: Start isEmpty. Operand 3605 states and 9303 transitions. [2021-06-05 03:49:56,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 03:49:56,685 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:49:56,685 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:49:56,888 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable306,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:56,889 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:49:56,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:49:56,889 INFO L82 PathProgramCache]: Analyzing trace with hash 1664435223, now seen corresponding path program 77 times [2021-06-05 03:49:56,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:49:56,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023472358] [2021-06-05 03:49:56,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:49:56,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:56,935 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 32 proven. 33 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:49:56,936 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:49:56,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023472358] [2021-06-05 03:49:56,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023472358] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:56,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62906951] [2021-06-05 03:49:56,936 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:56,960 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 03:49:56,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:49:56,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 03:49:56,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:49:57,021 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 35 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:49:57,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62906951] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:57,021 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:49:57,021 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 10 [2021-06-05 03:49:57,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900950639] [2021-06-05 03:49:57,021 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 03:49:57,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:49:57,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 03:49:57,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-06-05 03:49:57,021 INFO L87 Difference]: Start difference. First operand 3605 states and 9303 transitions. Second operand has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:57,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:49:57,145 INFO L93 Difference]: Finished difference Result 4564 states and 11216 transitions. [2021-06-05 03:49:57,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 03:49:57,145 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 03:49:57,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:49:57,149 INFO L225 Difference]: With dead ends: 4564 [2021-06-05 03:49:57,149 INFO L226 Difference]: Without dead ends: 4552 [2021-06-05 03:49:57,149 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 56.4ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:49:57,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4552 states. [2021-06-05 03:49:57,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4552 to 3605. [2021-06-05 03:49:57,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3605 states, 3604 states have (on average 2.5804661487236404) internal successors, (9300), 3604 states have internal predecessors, (9300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:57,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3605 states to 3605 states and 9300 transitions. [2021-06-05 03:49:57,186 INFO L78 Accepts]: Start accepts. Automaton has 3605 states and 9300 transitions. Word has length 41 [2021-06-05 03:49:57,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:49:57,186 INFO L482 AbstractCegarLoop]: Abstraction has 3605 states and 9300 transitions. [2021-06-05 03:49:57,186 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:57,186 INFO L276 IsEmpty]: Start isEmpty. Operand 3605 states and 9300 transitions. [2021-06-05 03:49:57,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 03:49:57,188 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:49:57,188 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:49:57,389 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable308,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:57,389 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:49:57,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:49:57,389 INFO L82 PathProgramCache]: Analyzing trace with hash 216435210, now seen corresponding path program 78 times [2021-06-05 03:49:57,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:49:57,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101167309] [2021-06-05 03:49:57,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:49:57,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:57,439 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 13 proven. 51 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:49:57,439 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:49:57,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101167309] [2021-06-05 03:49:57,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101167309] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:57,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220841775] [2021-06-05 03:49:57,440 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:57,463 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 03:49:57,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:49:57,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 03:49:57,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:49:57,533 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 9 proven. 55 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:49:57,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220841775] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:57,533 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:49:57,534 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-06-05 03:49:57,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166425682] [2021-06-05 03:49:57,534 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 03:49:57,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:49:57,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 03:49:57,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-06-05 03:49:57,534 INFO L87 Difference]: Start difference. First operand 3605 states and 9300 transitions. Second operand has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:57,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:49:57,818 INFO L93 Difference]: Finished difference Result 3907 states and 9798 transitions. [2021-06-05 03:49:57,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 03:49:57,818 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 03:49:57,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:49:57,822 INFO L225 Difference]: With dead ends: 3907 [2021-06-05 03:49:57,822 INFO L226 Difference]: Without dead ends: 3810 [2021-06-05 03:49:57,822 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 74.2ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:49:57,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3810 states. [2021-06-05 03:49:57,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3810 to 3511. [2021-06-05 03:49:57,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3511 states, 3510 states have (on average 2.5866096866096866) internal successors, (9079), 3510 states have internal predecessors, (9079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:57,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3511 states to 3511 states and 9079 transitions. [2021-06-05 03:49:57,854 INFO L78 Accepts]: Start accepts. Automaton has 3511 states and 9079 transitions. Word has length 41 [2021-06-05 03:49:57,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:49:57,854 INFO L482 AbstractCegarLoop]: Abstraction has 3511 states and 9079 transitions. [2021-06-05 03:49:57,854 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:57,855 INFO L276 IsEmpty]: Start isEmpty. Operand 3511 states and 9079 transitions. [2021-06-05 03:49:57,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 03:49:57,856 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:49:57,856 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:49:58,057 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable311 [2021-06-05 03:49:58,057 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:49:58,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:49:58,057 INFO L82 PathProgramCache]: Analyzing trace with hash -397100970, now seen corresponding path program 79 times [2021-06-05 03:49:58,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:49:58,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425762352] [2021-06-05 03:49:58,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:49:58,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:58,116 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 11 proven. 52 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:49:58,116 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:49:58,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425762352] [2021-06-05 03:49:58,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425762352] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:58,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632880445] [2021-06-05 03:49:58,116 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:58,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:58,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 03:49:58,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:49:58,193 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 53 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:49:58,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632880445] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:58,193 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:49:58,193 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 03:49:58,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862067549] [2021-06-05 03:49:58,193 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 03:49:58,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:49:58,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 03:49:58,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-06-05 03:49:58,194 INFO L87 Difference]: Start difference. First operand 3511 states and 9079 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:58,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:49:58,393 INFO L93 Difference]: Finished difference Result 3950 states and 9921 transitions. [2021-06-05 03:49:58,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 03:49:58,393 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 03:49:58,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:49:58,398 INFO L225 Difference]: With dead ends: 3950 [2021-06-05 03:49:58,398 INFO L226 Difference]: Without dead ends: 3938 [2021-06-05 03:49:58,398 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 77.3ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:49:58,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3938 states. [2021-06-05 03:49:58,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3938 to 3513. [2021-06-05 03:49:58,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3513 states, 3512 states have (on average 2.5865603644646926) internal successors, (9084), 3512 states have internal predecessors, (9084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:58,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3513 states to 3513 states and 9084 transitions. [2021-06-05 03:49:58,436 INFO L78 Accepts]: Start accepts. Automaton has 3513 states and 9084 transitions. Word has length 41 [2021-06-05 03:49:58,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:49:58,436 INFO L482 AbstractCegarLoop]: Abstraction has 3513 states and 9084 transitions. [2021-06-05 03:49:58,436 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:58,436 INFO L276 IsEmpty]: Start isEmpty. Operand 3513 states and 9084 transitions. [2021-06-05 03:49:58,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 03:49:58,438 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:49:58,438 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:49:58,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable312 [2021-06-05 03:49:58,649 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:49:58,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:49:58,649 INFO L82 PathProgramCache]: Analyzing trace with hash -554400457, now seen corresponding path program 36 times [2021-06-05 03:49:58,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:49:58,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678282231] [2021-06-05 03:49:58,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:49:58,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:58,691 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 36 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:49:58,691 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:49:58,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678282231] [2021-06-05 03:49:58,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678282231] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:58,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190282176] [2021-06-05 03:49:58,691 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:58,715 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 03:49:58,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:49:58,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 03:49:58,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:49:58,787 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 37 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:49:58,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190282176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:58,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:49:58,787 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12] total 13 [2021-06-05 03:49:58,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576136323] [2021-06-05 03:49:58,787 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:49:58,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:49:58,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:49:58,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:49:58,787 INFO L87 Difference]: Start difference. First operand 3513 states and 9084 transitions. Second operand has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 13 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:58,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:49:58,926 INFO L93 Difference]: Finished difference Result 4278 states and 10675 transitions. [2021-06-05 03:49:58,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 03:49:58,927 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 13 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 03:49:58,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:49:58,930 INFO L225 Difference]: With dead ends: 4278 [2021-06-05 03:49:58,930 INFO L226 Difference]: Without dead ends: 4268 [2021-06-05 03:49:58,930 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 77.0ms TimeCoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:49:58,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4268 states. [2021-06-05 03:49:58,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4268 to 3755. [2021-06-05 03:49:58,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3755 states, 3754 states have (on average 2.587906233351092) internal successors, (9715), 3754 states have internal predecessors, (9715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:58,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3755 states to 3755 states and 9715 transitions. [2021-06-05 03:49:58,967 INFO L78 Accepts]: Start accepts. Automaton has 3755 states and 9715 transitions. Word has length 41 [2021-06-05 03:49:58,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:49:58,967 INFO L482 AbstractCegarLoop]: Abstraction has 3755 states and 9715 transitions. [2021-06-05 03:49:58,967 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 13 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:58,967 INFO L276 IsEmpty]: Start isEmpty. Operand 3755 states and 9715 transitions. [2021-06-05 03:49:58,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 03:49:58,969 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:49:58,969 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:49:59,169 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable313,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:59,170 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:49:59,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:49:59,170 INFO L82 PathProgramCache]: Analyzing trace with hash 1744816364, now seen corresponding path program 80 times [2021-06-05 03:49:59,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:49:59,170 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853211609] [2021-06-05 03:49:59,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:49:59,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:59,222 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 11 proven. 53 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:49:59,222 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:49:59,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853211609] [2021-06-05 03:49:59,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853211609] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:59,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946086441] [2021-06-05 03:49:59,223 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:59,245 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:49:59,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:49:59,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 03:49:59,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:49:59,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 03:49:59,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2021-06-05 03:49:59,308 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 03:49:59,309 INFO L628 ElimStorePlain]: treesize reduction 20, result has 4.8 percent of original size [2021-06-05 03:49:59,310 INFO L518 ElimStorePlain]: Eliminatee B vanished before elimination [2021-06-05 03:49:59,310 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 03:49:59,310 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:1 [2021-06-05 03:49:59,316 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 14 proven. 50 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:49:59,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946086441] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:59,316 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:49:59,316 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 03:49:59,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267424227] [2021-06-05 03:49:59,316 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 03:49:59,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:49:59,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 03:49:59,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:49:59,316 INFO L87 Difference]: Start difference. First operand 3755 states and 9715 transitions. Second operand has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:59,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:49:59,632 INFO L93 Difference]: Finished difference Result 5015 states and 12296 transitions. [2021-06-05 03:49:59,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 03:49:59,633 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 03:49:59,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:49:59,637 INFO L225 Difference]: With dead ends: 5015 [2021-06-05 03:49:59,637 INFO L226 Difference]: Without dead ends: 4961 [2021-06-05 03:49:59,637 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 140.5ms TimeCoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2021-06-05 03:49:59,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4961 states. [2021-06-05 03:49:59,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4961 to 3838. [2021-06-05 03:49:59,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3838 states, 3837 states have (on average 2.5882199635131613) internal successors, (9931), 3837 states have internal predecessors, (9931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:59,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3838 states to 3838 states and 9931 transitions. [2021-06-05 03:49:59,677 INFO L78 Accepts]: Start accepts. Automaton has 3838 states and 9931 transitions. Word has length 41 [2021-06-05 03:49:59,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:49:59,677 INFO L482 AbstractCegarLoop]: Abstraction has 3838 states and 9931 transitions. [2021-06-05 03:49:59,677 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:49:59,677 INFO L276 IsEmpty]: Start isEmpty. Operand 3838 states and 9931 transitions. [2021-06-05 03:49:59,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 03:49:59,679 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:49:59,679 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:49:59,879 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable316 [2021-06-05 03:49:59,880 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:49:59,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:49:59,880 INFO L82 PathProgramCache]: Analyzing trace with hash -1017591823, now seen corresponding path program 81 times [2021-06-05 03:49:59,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:49:59,880 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794640239] [2021-06-05 03:49:59,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:49:59,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:49:59,928 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 24 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:49:59,928 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:49:59,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794640239] [2021-06-05 03:49:59,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794640239] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:49:59,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011655996] [2021-06-05 03:49:59,929 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:49:59,952 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 03:49:59,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:49:59,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 03:49:59,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:50:00,007 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 24 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:50:00,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011655996] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:00,007 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:50:00,008 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 03:50:00,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125103588] [2021-06-05 03:50:00,008 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 03:50:00,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:50:00,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 03:50:00,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-05 03:50:00,008 INFO L87 Difference]: Start difference. First operand 3838 states and 9931 transitions. Second operand has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:00,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:50:00,106 INFO L93 Difference]: Finished difference Result 4722 states and 11676 transitions. [2021-06-05 03:50:00,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 03:50:00,106 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 03:50:00,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:50:00,110 INFO L225 Difference]: With dead ends: 4722 [2021-06-05 03:50:00,110 INFO L226 Difference]: Without dead ends: 4704 [2021-06-05 03:50:00,110 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 52.6ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:50:00,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4704 states. [2021-06-05 03:50:00,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4704 to 3928. [2021-06-05 03:50:00,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3928 states, 3927 states have (on average 2.6002037178507766) internal successors, (10211), 3927 states have internal predecessors, (10211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:00,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3928 states to 3928 states and 10211 transitions. [2021-06-05 03:50:00,149 INFO L78 Accepts]: Start accepts. Automaton has 3928 states and 10211 transitions. Word has length 41 [2021-06-05 03:50:00,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:50:00,149 INFO L482 AbstractCegarLoop]: Abstraction has 3928 states and 10211 transitions. [2021-06-05 03:50:00,149 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:00,149 INFO L276 IsEmpty]: Start isEmpty. Operand 3928 states and 10211 transitions. [2021-06-05 03:50:00,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 03:50:00,151 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:50:00,151 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:50:00,351 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable317,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:50:00,352 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:50:00,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:50:00,352 INFO L82 PathProgramCache]: Analyzing trace with hash 1899652898, now seen corresponding path program 82 times [2021-06-05 03:50:00,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:50:00,352 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121587424] [2021-06-05 03:50:00,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:50:00,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:50:00,411 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 11 proven. 53 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:50:00,411 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:50:00,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121587424] [2021-06-05 03:50:00,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121587424] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:00,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914157342] [2021-06-05 03:50:00,411 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:50:00,433 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:50:00,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:50:00,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 03:50:00,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:50:00,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 03:50:00,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2021-06-05 03:50:00,519 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 03:50:00,520 INFO L628 ElimStorePlain]: treesize reduction 20, result has 4.8 percent of original size [2021-06-05 03:50:00,520 INFO L518 ElimStorePlain]: Eliminatee B vanished before elimination [2021-06-05 03:50:00,521 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 03:50:00,521 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:1 [2021-06-05 03:50:00,526 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 14 proven. 50 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:50:00,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914157342] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:00,527 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:50:00,527 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-05 03:50:00,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991980106] [2021-06-05 03:50:00,527 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:50:00,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:50:00,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:50:00,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:50:00,527 INFO L87 Difference]: Start difference. First operand 3928 states and 10211 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:01,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:50:01,108 INFO L93 Difference]: Finished difference Result 7135 states and 16888 transitions. [2021-06-05 03:50:01,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 03:50:01,109 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 03:50:01,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:50:01,115 INFO L225 Difference]: With dead ends: 7135 [2021-06-05 03:50:01,115 INFO L226 Difference]: Without dead ends: 6955 [2021-06-05 03:50:01,115 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 286.1ms TimeCoverageRelationStatistics Valid=213, Invalid=1269, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 03:50:01,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6955 states. [2021-06-05 03:50:01,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6955 to 4145. [2021-06-05 03:50:01,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4145 states, 4144 states have (on average 2.5921814671814674) internal successors, (10742), 4144 states have internal predecessors, (10742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:01,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4145 states to 4145 states and 10742 transitions. [2021-06-05 03:50:01,165 INFO L78 Accepts]: Start accepts. Automaton has 4145 states and 10742 transitions. Word has length 41 [2021-06-05 03:50:01,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:50:01,165 INFO L482 AbstractCegarLoop]: Abstraction has 4145 states and 10742 transitions. [2021-06-05 03:50:01,165 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:01,165 INFO L276 IsEmpty]: Start isEmpty. Operand 4145 states and 10742 transitions. [2021-06-05 03:50:01,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 03:50:01,167 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:50:01,167 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:50:01,367 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable321 [2021-06-05 03:50:01,368 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:50:01,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:50:01,368 INFO L82 PathProgramCache]: Analyzing trace with hash -2008711721, now seen corresponding path program 83 times [2021-06-05 03:50:01,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:50:01,368 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610916487] [2021-06-05 03:50:01,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:50:01,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:50:01,427 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 22 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:50:01,427 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:50:01,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610916487] [2021-06-05 03:50:01,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610916487] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:01,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439669712] [2021-06-05 03:50:01,427 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:50:01,451 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 03:50:01,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:50:01,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 03:50:01,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:50:01,531 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 22 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:50:01,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439669712] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:01,531 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:50:01,531 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 12 [2021-06-05 03:50:01,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344620110] [2021-06-05 03:50:01,534 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 03:50:01,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:50:01,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 03:50:01,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:50:01,535 INFO L87 Difference]: Start difference. First operand 4145 states and 10742 transitions. Second operand has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 12 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:01,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:50:01,676 INFO L93 Difference]: Finished difference Result 5126 states and 12564 transitions. [2021-06-05 03:50:01,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 03:50:01,676 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 12 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 03:50:01,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:50:01,680 INFO L225 Difference]: With dead ends: 5126 [2021-06-05 03:50:01,680 INFO L226 Difference]: Without dead ends: 5099 [2021-06-05 03:50:01,681 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 84.1ms TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:50:01,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5099 states. [2021-06-05 03:50:01,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5099 to 4145. [2021-06-05 03:50:01,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4145 states, 4144 states have (on average 2.591457528957529) internal successors, (10739), 4144 states have internal predecessors, (10739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:01,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4145 states to 4145 states and 10739 transitions. [2021-06-05 03:50:01,729 INFO L78 Accepts]: Start accepts. Automaton has 4145 states and 10739 transitions. Word has length 41 [2021-06-05 03:50:01,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:50:01,729 INFO L482 AbstractCegarLoop]: Abstraction has 4145 states and 10739 transitions. [2021-06-05 03:50:01,729 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 12 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:01,729 INFO L276 IsEmpty]: Start isEmpty. Operand 4145 states and 10739 transitions. [2021-06-05 03:50:01,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 03:50:01,732 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:50:01,732 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:50:01,941 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable322 [2021-06-05 03:50:01,941 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:50:01,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:50:01,941 INFO L82 PathProgramCache]: Analyzing trace with hash 1839961388, now seen corresponding path program 84 times [2021-06-05 03:50:01,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:50:01,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065008909] [2021-06-05 03:50:01,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:50:01,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:50:02,007 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 11 proven. 53 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:50:02,007 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:50:02,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065008909] [2021-06-05 03:50:02,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065008909] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:02,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533298916] [2021-06-05 03:50:02,008 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:50:02,031 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 03:50:02,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:50:02,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 03:50:02,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:50:02,085 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 54 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:50:02,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533298916] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:02,085 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:50:02,085 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 03:50:02,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290630293] [2021-06-05 03:50:02,085 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 03:50:02,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:50:02,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 03:50:02,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:50:02,085 INFO L87 Difference]: Start difference. First operand 4145 states and 10739 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:02,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:50:02,884 INFO L93 Difference]: Finished difference Result 8258 states and 19418 transitions. [2021-06-05 03:50:02,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-05 03:50:02,884 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 03:50:02,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:50:02,891 INFO L225 Difference]: With dead ends: 8258 [2021-06-05 03:50:02,892 INFO L226 Difference]: Without dead ends: 7982 [2021-06-05 03:50:02,892 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1320 ImplicationChecksByTransitivity, 531.8ms TimeCoverageRelationStatistics Valid=483, Invalid=3423, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 03:50:02,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7982 states. [2021-06-05 03:50:02,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7982 to 4501. [2021-06-05 03:50:02,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4501 states, 4500 states have (on average 2.5802222222222224) internal successors, (11611), 4500 states have internal predecessors, (11611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:02,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4501 states to 4501 states and 11611 transitions. [2021-06-05 03:50:02,948 INFO L78 Accepts]: Start accepts. Automaton has 4501 states and 11611 transitions. Word has length 41 [2021-06-05 03:50:02,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:50:02,948 INFO L482 AbstractCegarLoop]: Abstraction has 4501 states and 11611 transitions. [2021-06-05 03:50:02,948 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:02,948 INFO L276 IsEmpty]: Start isEmpty. Operand 4501 states and 11611 transitions. [2021-06-05 03:50:02,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 03:50:02,951 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:50:02,951 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:50:03,151 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable327 [2021-06-05 03:50:03,152 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:50:03,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:50:03,152 INFO L82 PathProgramCache]: Analyzing trace with hash -561433039, now seen corresponding path program 85 times [2021-06-05 03:50:03,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:50:03,152 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089531585] [2021-06-05 03:50:03,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:50:03,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:50:03,217 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 26 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:50:03,217 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:50:03,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089531585] [2021-06-05 03:50:03,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089531585] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:03,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404694794] [2021-06-05 03:50:03,217 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:50:03,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:50:03,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 03:50:03,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:50:03,294 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 26 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:50:03,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404694794] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:03,294 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:50:03,294 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 03:50:03,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607485532] [2021-06-05 03:50:03,294 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 03:50:03,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:50:03,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 03:50:03,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:50:03,294 INFO L87 Difference]: Start difference. First operand 4501 states and 11611 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:03,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:50:03,443 INFO L93 Difference]: Finished difference Result 5578 states and 13597 transitions. [2021-06-05 03:50:03,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 03:50:03,443 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 03:50:03,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:50:03,448 INFO L225 Difference]: With dead ends: 5578 [2021-06-05 03:50:03,448 INFO L226 Difference]: Without dead ends: 5542 [2021-06-05 03:50:03,448 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 86.1ms TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:50:03,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5542 states. [2021-06-05 03:50:03,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5542 to 4501. [2021-06-05 03:50:03,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4501 states, 4500 states have (on average 2.5795555555555554) internal successors, (11608), 4500 states have internal predecessors, (11608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:03,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4501 states to 4501 states and 11608 transitions. [2021-06-05 03:50:03,498 INFO L78 Accepts]: Start accepts. Automaton has 4501 states and 11608 transitions. Word has length 41 [2021-06-05 03:50:03,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:50:03,498 INFO L482 AbstractCegarLoop]: Abstraction has 4501 states and 11608 transitions. [2021-06-05 03:50:03,498 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:03,499 INFO L276 IsEmpty]: Start isEmpty. Operand 4501 states and 11608 transitions. [2021-06-05 03:50:03,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 03:50:03,501 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:50:03,501 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:50:03,701 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable328,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:50:03,702 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:50:03,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:50:03,702 INFO L82 PathProgramCache]: Analyzing trace with hash 1686647522, now seen corresponding path program 86 times [2021-06-05 03:50:03,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:50:03,702 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816906141] [2021-06-05 03:50:03,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:50:03,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:50:03,780 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:50:03,781 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:50:03,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816906141] [2021-06-05 03:50:03,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816906141] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:03,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678866550] [2021-06-05 03:50:03,781 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:50:03,803 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:50:03,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:50:03,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 03:50:03,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:50:03,855 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:50:03,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678866550] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:03,856 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:50:03,856 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 03:50:03,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375050699] [2021-06-05 03:50:03,856 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 03:50:03,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:50:03,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 03:50:03,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:50:03,856 INFO L87 Difference]: Start difference. First operand 4501 states and 11608 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:04,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:50:04,246 INFO L93 Difference]: Finished difference Result 5731 states and 13840 transitions. [2021-06-05 03:50:04,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 03:50:04,246 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 03:50:04,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:50:04,251 INFO L225 Difference]: With dead ends: 5731 [2021-06-05 03:50:04,251 INFO L226 Difference]: Without dead ends: 5353 [2021-06-05 03:50:04,251 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 205.9ms TimeCoverageRelationStatistics Valid=126, Invalid=524, Unknown=0, NotChecked=0, Total=650 [2021-06-05 03:50:04,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5353 states. [2021-06-05 03:50:04,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5353 to 3673. [2021-06-05 03:50:04,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3673 states, 3672 states have (on average 2.6173747276688455) internal successors, (9611), 3672 states have internal predecessors, (9611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:04,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3673 states to 3673 states and 9611 transitions. [2021-06-05 03:50:04,295 INFO L78 Accepts]: Start accepts. Automaton has 3673 states and 9611 transitions. Word has length 41 [2021-06-05 03:50:04,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:50:04,295 INFO L482 AbstractCegarLoop]: Abstraction has 3673 states and 9611 transitions. [2021-06-05 03:50:04,295 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:04,295 INFO L276 IsEmpty]: Start isEmpty. Operand 3673 states and 9611 transitions. [2021-06-05 03:50:04,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 03:50:04,297 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:50:04,297 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:50:04,497 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable334 [2021-06-05 03:50:04,497 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:50:04,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:50:04,498 INFO L82 PathProgramCache]: Analyzing trace with hash 826705595, now seen corresponding path program 37 times [2021-06-05 03:50:04,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:50:04,498 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457195747] [2021-06-05 03:50:04,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:50:04,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:50:04,543 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 48 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:50:04,544 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:50:04,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457195747] [2021-06-05 03:50:04,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457195747] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:04,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694127658] [2021-06-05 03:50:04,544 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:50:04,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:50:04,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 03:50:04,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:50:04,632 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 49 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:50:04,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694127658] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:04,632 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:50:04,632 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 10 [2021-06-05 03:50:04,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666284903] [2021-06-05 03:50:04,632 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 03:50:04,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:50:04,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 03:50:04,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-06-05 03:50:04,633 INFO L87 Difference]: Start difference. First operand 3673 states and 9611 transitions. Second operand has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:04,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:50:04,910 INFO L93 Difference]: Finished difference Result 4473 states and 11190 transitions. [2021-06-05 03:50:04,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 03:50:04,910 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 03:50:04,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:50:04,915 INFO L225 Difference]: With dead ends: 4473 [2021-06-05 03:50:04,915 INFO L226 Difference]: Without dead ends: 4473 [2021-06-05 03:50:04,915 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 126.9ms TimeCoverageRelationStatistics Valid=138, Invalid=204, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:50:04,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4473 states. [2021-06-05 03:50:04,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4473 to 3628. [2021-06-05 03:50:04,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3628 states, 3627 states have (on average 2.626413013509788) internal successors, (9526), 3627 states have internal predecessors, (9526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:04,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3628 states to 3628 states and 9526 transitions. [2021-06-05 03:50:04,957 INFO L78 Accepts]: Start accepts. Automaton has 3628 states and 9526 transitions. Word has length 41 [2021-06-05 03:50:04,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:50:04,957 INFO L482 AbstractCegarLoop]: Abstraction has 3628 states and 9526 transitions. [2021-06-05 03:50:04,957 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:04,957 INFO L276 IsEmpty]: Start isEmpty. Operand 3628 states and 9526 transitions. [2021-06-05 03:50:04,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 03:50:04,959 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:50:04,959 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:50:05,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable335,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:50:05,160 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:50:05,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:50:05,160 INFO L82 PathProgramCache]: Analyzing trace with hash -1858902121, now seen corresponding path program 87 times [2021-06-05 03:50:05,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:50:05,160 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038862671] [2021-06-05 03:50:05,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:50:05,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:50:05,237 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 37 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:50:05,237 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:50:05,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038862671] [2021-06-05 03:50:05,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038862671] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:05,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945257493] [2021-06-05 03:50:05,238 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:50:05,261 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 03:50:05,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:50:05,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 03:50:05,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:50:05,320 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 37 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:50:05,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945257493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:05,320 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:50:05,320 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-06-05 03:50:05,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860714156] [2021-06-05 03:50:05,321 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 03:50:05,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:50:05,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 03:50:05,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:50:05,321 INFO L87 Difference]: Start difference. First operand 3628 states and 9526 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:05,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:50:05,490 INFO L93 Difference]: Finished difference Result 4326 states and 10808 transitions. [2021-06-05 03:50:05,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 03:50:05,491 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 03:50:05,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:50:05,495 INFO L225 Difference]: With dead ends: 4326 [2021-06-05 03:50:05,495 INFO L226 Difference]: Without dead ends: 4279 [2021-06-05 03:50:05,495 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 105.5ms TimeCoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2021-06-05 03:50:05,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4279 states. [2021-06-05 03:50:05,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4279 to 3637. [2021-06-05 03:50:05,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3637 states, 3636 states have (on average 2.623762376237624) internal successors, (9540), 3636 states have internal predecessors, (9540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:05,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3637 states to 3637 states and 9540 transitions. [2021-06-05 03:50:05,533 INFO L78 Accepts]: Start accepts. Automaton has 3637 states and 9540 transitions. Word has length 41 [2021-06-05 03:50:05,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:50:05,533 INFO L482 AbstractCegarLoop]: Abstraction has 3637 states and 9540 transitions. [2021-06-05 03:50:05,534 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:05,534 INFO L276 IsEmpty]: Start isEmpty. Operand 3637 states and 9540 transitions. [2021-06-05 03:50:05,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 03:50:05,536 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:50:05,536 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:50:05,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable338 [2021-06-05 03:50:05,736 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:50:05,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:50:05,737 INFO L82 PathProgramCache]: Analyzing trace with hash 714915480, now seen corresponding path program 88 times [2021-06-05 03:50:05,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:50:05,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232031213] [2021-06-05 03:50:05,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:50:05,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:50:05,791 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:50:05,791 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:50:05,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232031213] [2021-06-05 03:50:05,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232031213] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:05,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494403785] [2021-06-05 03:50:05,791 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:50:05,815 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:50:05,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:50:05,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 03:50:05,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:50:06,011 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 35 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:50:06,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494403785] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:06,012 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:50:06,012 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 13] total 19 [2021-06-05 03:50:06,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840818142] [2021-06-05 03:50:06,012 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 03:50:06,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:50:06,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 03:50:06,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-06-05 03:50:06,012 INFO L87 Difference]: Start difference. First operand 3637 states and 9540 transitions. Second operand has 20 states, 20 states have (on average 4.35) internal successors, (87), 19 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:06,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:50:06,890 INFO L93 Difference]: Finished difference Result 5488 states and 13282 transitions. [2021-06-05 03:50:06,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 03:50:06,891 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.35) internal successors, (87), 19 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 03:50:06,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:50:06,896 INFO L225 Difference]: With dead ends: 5488 [2021-06-05 03:50:06,896 INFO L226 Difference]: Without dead ends: 5450 [2021-06-05 03:50:06,896 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 498.8ms TimeCoverageRelationStatistics Valid=473, Invalid=1783, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 03:50:06,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5450 states. [2021-06-05 03:50:06,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5450 to 4188. [2021-06-05 03:50:06,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4188 states, 4187 states have (on average 2.571053260090757) internal successors, (10765), 4187 states have internal predecessors, (10765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:06,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4188 states to 4188 states and 10765 transitions. [2021-06-05 03:50:06,941 INFO L78 Accepts]: Start accepts. Automaton has 4188 states and 10765 transitions. Word has length 44 [2021-06-05 03:50:06,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:50:06,941 INFO L482 AbstractCegarLoop]: Abstraction has 4188 states and 10765 transitions. [2021-06-05 03:50:06,941 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 4.35) internal successors, (87), 19 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:06,941 INFO L276 IsEmpty]: Start isEmpty. Operand 4188 states and 10765 transitions. [2021-06-05 03:50:06,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 03:50:06,943 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:50:06,943 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:50:07,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable345 [2021-06-05 03:50:07,144 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:50:07,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:50:07,144 INFO L82 PathProgramCache]: Analyzing trace with hash 667584024, now seen corresponding path program 89 times [2021-06-05 03:50:07,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:50:07,144 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924417299] [2021-06-05 03:50:07,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:50:07,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:50:07,204 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 03:50:07,204 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:50:07,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924417299] [2021-06-05 03:50:07,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924417299] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:07,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573878852] [2021-06-05 03:50:07,204 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:50:07,230 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-05 03:50:07,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:50:07,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 03:50:07,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:50:07,281 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 03:50:07,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573878852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:07,281 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:50:07,281 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 03:50:07,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786190803] [2021-06-05 03:50:07,282 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 03:50:07,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:50:07,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 03:50:07,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-05 03:50:07,282 INFO L87 Difference]: Start difference. First operand 4188 states and 10765 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:07,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:50:07,458 INFO L93 Difference]: Finished difference Result 4818 states and 11987 transitions. [2021-06-05 03:50:07,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 03:50:07,459 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 03:50:07,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:50:07,463 INFO L225 Difference]: With dead ends: 4818 [2021-06-05 03:50:07,463 INFO L226 Difference]: Without dead ends: 4783 [2021-06-05 03:50:07,463 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 49.0ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-05 03:50:07,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4783 states. [2021-06-05 03:50:07,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4783 to 4206. [2021-06-05 03:50:07,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4206 states, 4205 states have (on average 2.5690844233055885) internal successors, (10803), 4205 states have internal predecessors, (10803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:07,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4206 states to 4206 states and 10803 transitions. [2021-06-05 03:50:07,507 INFO L78 Accepts]: Start accepts. Automaton has 4206 states and 10803 transitions. Word has length 44 [2021-06-05 03:50:07,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:50:07,508 INFO L482 AbstractCegarLoop]: Abstraction has 4206 states and 10803 transitions. [2021-06-05 03:50:07,508 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:07,508 INFO L276 IsEmpty]: Start isEmpty. Operand 4206 states and 10803 transitions. [2021-06-05 03:50:07,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 03:50:07,510 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:50:07,510 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:50:07,711 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable346,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:50:07,711 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:50:07,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:50:07,711 INFO L82 PathProgramCache]: Analyzing trace with hash -19269454, now seen corresponding path program 90 times [2021-06-05 03:50:07,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:50:07,711 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131981520] [2021-06-05 03:50:07,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:50:07,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:50:07,753 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 03:50:07,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:50:07,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131981520] [2021-06-05 03:50:07,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131981520] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:07,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604093004] [2021-06-05 03:50:07,753 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:50:07,779 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-05 03:50:07,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:50:07,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 03:50:07,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:50:07,898 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 19 proven. 60 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:50:07,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604093004] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:07,898 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:50:07,898 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 03:50:07,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82185124] [2021-06-05 03:50:07,899 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 03:50:07,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:50:07,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 03:50:07,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:50:07,899 INFO L87 Difference]: Start difference. First operand 4206 states and 10803 transitions. Second operand has 15 states, 15 states have (on average 5.6) internal successors, (84), 14 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:08,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:50:08,445 INFO L93 Difference]: Finished difference Result 6446 states and 15040 transitions. [2021-06-05 03:50:08,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 03:50:08,445 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.6) internal successors, (84), 14 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 03:50:08,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:50:08,451 INFO L225 Difference]: With dead ends: 6446 [2021-06-05 03:50:08,451 INFO L226 Difference]: Without dead ends: 6383 [2021-06-05 03:50:08,451 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 251.5ms TimeCoverageRelationStatistics Valid=207, Invalid=849, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 03:50:08,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6383 states. [2021-06-05 03:50:08,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6383 to 4276. [2021-06-05 03:50:08,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4276 states, 4275 states have (on average 2.56046783625731) internal successors, (10946), 4275 states have internal predecessors, (10946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:08,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4276 states to 4276 states and 10946 transitions. [2021-06-05 03:50:08,495 INFO L78 Accepts]: Start accepts. Automaton has 4276 states and 10946 transitions. Word has length 44 [2021-06-05 03:50:08,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:50:08,495 INFO L482 AbstractCegarLoop]: Abstraction has 4276 states and 10946 transitions. [2021-06-05 03:50:08,495 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.6) internal successors, (84), 14 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:08,495 INFO L276 IsEmpty]: Start isEmpty. Operand 4276 states and 10946 transitions. [2021-06-05 03:50:08,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 03:50:08,497 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:50:08,497 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:50:08,698 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable347 [2021-06-05 03:50:08,698 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:50:08,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:50:08,698 INFO L82 PathProgramCache]: Analyzing trace with hash -847034408, now seen corresponding path program 91 times [2021-06-05 03:50:08,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:50:08,698 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754731580] [2021-06-05 03:50:08,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:50:08,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:50:08,739 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 03:50:08,739 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:50:08,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754731580] [2021-06-05 03:50:08,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754731580] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:08,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758581023] [2021-06-05 03:50:08,739 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:50:08,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:50:08,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 03:50:08,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:50:08,811 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 03:50:08,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758581023] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:08,811 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:50:08,811 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 03:50:08,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590474966] [2021-06-05 03:50:08,812 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 03:50:08,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:50:08,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 03:50:08,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-05 03:50:08,812 INFO L87 Difference]: Start difference. First operand 4276 states and 10946 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:08,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:50:08,983 INFO L93 Difference]: Finished difference Result 4915 states and 12209 transitions. [2021-06-05 03:50:08,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 03:50:08,983 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 03:50:08,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:50:08,988 INFO L225 Difference]: With dead ends: 4915 [2021-06-05 03:50:08,988 INFO L226 Difference]: Without dead ends: 4877 [2021-06-05 03:50:08,988 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 32.0ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-05 03:50:08,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4877 states. [2021-06-05 03:50:09,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4877 to 4348. [2021-06-05 03:50:09,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4348 states, 4347 states have (on average 2.5500345065562455) internal successors, (11085), 4347 states have internal predecessors, (11085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:09,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4348 states to 4348 states and 11085 transitions. [2021-06-05 03:50:09,029 INFO L78 Accepts]: Start accepts. Automaton has 4348 states and 11085 transitions. Word has length 44 [2021-06-05 03:50:09,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:50:09,029 INFO L482 AbstractCegarLoop]: Abstraction has 4348 states and 11085 transitions. [2021-06-05 03:50:09,030 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:09,030 INFO L276 IsEmpty]: Start isEmpty. Operand 4348 states and 11085 transitions. [2021-06-05 03:50:09,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 03:50:09,032 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:50:09,032 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:50:09,233 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable348,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:50:09,233 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:50:09,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:50:09,233 INFO L82 PathProgramCache]: Analyzing trace with hash 909434610, now seen corresponding path program 92 times [2021-06-05 03:50:09,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:50:09,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778210103] [2021-06-05 03:50:09,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:50:09,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:50:09,274 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 03:50:09,275 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:50:09,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778210103] [2021-06-05 03:50:09,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778210103] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:09,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622694108] [2021-06-05 03:50:09,275 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:50:09,297 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:50:09,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:50:09,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 03:50:09,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:50:09,418 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 17 proven. 62 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:50:09,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622694108] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:09,418 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:50:09,418 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 03:50:09,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615565991] [2021-06-05 03:50:09,418 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 03:50:09,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:50:09,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 03:50:09,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:50:09,419 INFO L87 Difference]: Start difference. First operand 4348 states and 11085 transitions. Second operand has 15 states, 15 states have (on average 5.6) internal successors, (84), 14 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:10,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:50:10,016 INFO L93 Difference]: Finished difference Result 6734 states and 15579 transitions. [2021-06-05 03:50:10,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 03:50:10,017 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.6) internal successors, (84), 14 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 03:50:10,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:50:10,023 INFO L225 Difference]: With dead ends: 6734 [2021-06-05 03:50:10,023 INFO L226 Difference]: Without dead ends: 6671 [2021-06-05 03:50:10,023 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 263.3ms TimeCoverageRelationStatistics Valid=207, Invalid=849, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 03:50:10,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6671 states. [2021-06-05 03:50:10,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6671 to 4452. [2021-06-05 03:50:10,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4452 states, 4451 states have (on average 2.5362839811278364) internal successors, (11289), 4451 states have internal predecessors, (11289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:10,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4452 states to 4452 states and 11289 transitions. [2021-06-05 03:50:10,069 INFO L78 Accepts]: Start accepts. Automaton has 4452 states and 11289 transitions. Word has length 44 [2021-06-05 03:50:10,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:50:10,070 INFO L482 AbstractCegarLoop]: Abstraction has 4452 states and 11289 transitions. [2021-06-05 03:50:10,070 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.6) internal successors, (84), 14 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:10,070 INFO L276 IsEmpty]: Start isEmpty. Operand 4452 states and 11289 transitions. [2021-06-05 03:50:10,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 03:50:10,072 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:50:10,072 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:50:10,273 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable349,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:50:10,273 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:50:10,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:50:10,273 INFO L82 PathProgramCache]: Analyzing trace with hash -2003584616, now seen corresponding path program 93 times [2021-06-05 03:50:10,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:50:10,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528772510] [2021-06-05 03:50:10,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:50:10,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:50:10,331 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 03:50:10,331 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:50:10,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528772510] [2021-06-05 03:50:10,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528772510] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:10,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873753276] [2021-06-05 03:50:10,331 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:50:10,357 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 03:50:10,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:50:10,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 03:50:10,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:50:10,479 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 26 proven. 54 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:50:10,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873753276] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:10,480 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:50:10,480 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 03:50:10,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351074223] [2021-06-05 03:50:10,480 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 03:50:10,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:50:10,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 03:50:10,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:50:10,480 INFO L87 Difference]: Start difference. First operand 4452 states and 11289 transitions. Second operand has 15 states, 15 states have (on average 5.733333333333333) internal successors, (86), 14 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:11,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:50:11,086 INFO L93 Difference]: Finished difference Result 7036 states and 16396 transitions. [2021-06-05 03:50:11,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 03:50:11,087 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.733333333333333) internal successors, (86), 14 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 03:50:11,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:50:11,094 INFO L225 Difference]: With dead ends: 7036 [2021-06-05 03:50:11,094 INFO L226 Difference]: Without dead ends: 6998 [2021-06-05 03:50:11,094 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 264.5ms TimeCoverageRelationStatistics Valid=207, Invalid=849, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 03:50:11,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6998 states. [2021-06-05 03:50:11,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6998 to 4889. [2021-06-05 03:50:11,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4889 states, 4888 states have (on average 2.5384615384615383) internal successors, (12408), 4888 states have internal predecessors, (12408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:11,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4889 states to 4889 states and 12408 transitions. [2021-06-05 03:50:11,144 INFO L78 Accepts]: Start accepts. Automaton has 4889 states and 12408 transitions. Word has length 44 [2021-06-05 03:50:11,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:50:11,144 INFO L482 AbstractCegarLoop]: Abstraction has 4889 states and 12408 transitions. [2021-06-05 03:50:11,144 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.733333333333333) internal successors, (86), 14 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:11,144 INFO L276 IsEmpty]: Start isEmpty. Operand 4889 states and 12408 transitions. [2021-06-05 03:50:11,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 03:50:11,147 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:50:11,147 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:50:11,348 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable350,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:50:11,348 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:50:11,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:50:11,348 INFO L82 PathProgramCache]: Analyzing trace with hash 106678869, now seen corresponding path program 38 times [2021-06-05 03:50:11,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:50:11,348 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347229562] [2021-06-05 03:50:11,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:50:11,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:50:11,446 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:50:11,446 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:50:11,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347229562] [2021-06-05 03:50:11,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347229562] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:11,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586119486] [2021-06-05 03:50:11,446 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:50:11,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:50:11,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:50:11,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 03:50:11,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:50:12,084 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 36 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:50:12,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586119486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:12,084 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:50:12,084 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 29 [2021-06-05 03:50:12,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411881795] [2021-06-05 03:50:12,084 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 03:50:12,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:50:12,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 03:50:12,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=777, Unknown=0, NotChecked=0, Total=870 [2021-06-05 03:50:12,085 INFO L87 Difference]: Start difference. First operand 4889 states and 12408 transitions. Second operand has 30 states, 30 states have (on average 2.8666666666666667) internal successors, (86), 29 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:19,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:50:19,228 INFO L93 Difference]: Finished difference Result 12578 states and 28875 transitions. [2021-06-05 03:50:19,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 194 states. [2021-06-05 03:50:19,228 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.8666666666666667) internal successors, (86), 29 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 03:50:19,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:50:19,239 INFO L225 Difference]: With dead ends: 12578 [2021-06-05 03:50:19,239 INFO L226 Difference]: Without dead ends: 12155 [2021-06-05 03:50:19,241 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 210 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17409 ImplicationChecksByTransitivity, 6028.5ms TimeCoverageRelationStatistics Valid=5955, Invalid=38777, Unknown=0, NotChecked=0, Total=44732 [2021-06-05 03:50:19,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12155 states. [2021-06-05 03:50:19,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12155 to 6139. [2021-06-05 03:50:19,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6139 states, 6138 states have (on average 2.623330074942978) internal successors, (16102), 6138 states have internal predecessors, (16102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:19,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6139 states to 6139 states and 16102 transitions. [2021-06-05 03:50:19,328 INFO L78 Accepts]: Start accepts. Automaton has 6139 states and 16102 transitions. Word has length 47 [2021-06-05 03:50:19,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:50:19,328 INFO L482 AbstractCegarLoop]: Abstraction has 6139 states and 16102 transitions. [2021-06-05 03:50:19,328 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.8666666666666667) internal successors, (86), 29 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:19,328 INFO L276 IsEmpty]: Start isEmpty. Operand 6139 states and 16102 transitions. [2021-06-05 03:50:19,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 03:50:19,332 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:50:19,332 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:50:19,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable351,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:50:19,532 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:50:19,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:50:19,533 INFO L82 PathProgramCache]: Analyzing trace with hash -1531001323, now seen corresponding path program 94 times [2021-06-05 03:50:19,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:50:19,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508915891] [2021-06-05 03:50:19,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:50:19,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:50:19,646 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:50:19,646 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:50:19,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508915891] [2021-06-05 03:50:19,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508915891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:19,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138203107] [2021-06-05 03:50:19,647 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:50:19,690 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:50:19,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:50:19,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 03:50:19,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:50:19,898 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 11 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:50:19,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138203107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:19,899 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:50:19,899 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-06-05 03:50:19,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810233933] [2021-06-05 03:50:19,899 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 03:50:19,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:50:19,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 03:50:19,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-06-05 03:50:19,899 INFO L87 Difference]: Start difference. First operand 6139 states and 16102 transitions. Second operand has 20 states, 20 states have (on average 3.35) internal successors, (67), 19 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:20,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:50:20,512 INFO L93 Difference]: Finished difference Result 6357 states and 16438 transitions. [2021-06-05 03:50:20,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 03:50:20,512 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.35) internal successors, (67), 19 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 03:50:20,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:50:20,519 INFO L225 Difference]: With dead ends: 6357 [2021-06-05 03:50:20,519 INFO L226 Difference]: Without dead ends: 6277 [2021-06-05 03:50:20,520 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 195.4ms TimeCoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-06-05 03:50:20,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6277 states. [2021-06-05 03:50:20,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6277 to 6123. [2021-06-05 03:50:20,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6123 states, 6122 states have (on average 2.6210388761842536) internal successors, (16046), 6122 states have internal predecessors, (16046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:20,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6123 states to 6123 states and 16046 transitions. [2021-06-05 03:50:20,580 INFO L78 Accepts]: Start accepts. Automaton has 6123 states and 16046 transitions. Word has length 47 [2021-06-05 03:50:20,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:50:20,580 INFO L482 AbstractCegarLoop]: Abstraction has 6123 states and 16046 transitions. [2021-06-05 03:50:20,580 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.35) internal successors, (67), 19 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:20,580 INFO L276 IsEmpty]: Start isEmpty. Operand 6123 states and 16046 transitions. [2021-06-05 03:50:20,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 03:50:20,584 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:50:20,585 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:50:20,785 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable361,183 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:50:20,786 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:50:20,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:50:20,786 INFO L82 PathProgramCache]: Analyzing trace with hash 1758131688, now seen corresponding path program 39 times [2021-06-05 03:50:20,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:50:20,786 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846675195] [2021-06-05 03:50:20,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:50:20,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:50:20,837 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 44 proven. 54 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:50:20,838 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:50:20,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846675195] [2021-06-05 03:50:20,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846675195] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:20,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816199712] [2021-06-05 03:50:20,838 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:50:20,863 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 03:50:20,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:50:20,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 03:50:20,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:50:20,930 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 45 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:50:20,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816199712] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:20,931 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:50:20,931 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 10 [2021-06-05 03:50:20,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280138585] [2021-06-05 03:50:20,931 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 03:50:20,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:50:20,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 03:50:20,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-06-05 03:50:20,932 INFO L87 Difference]: Start difference. First operand 6123 states and 16046 transitions. Second operand has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:21,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:50:21,090 INFO L93 Difference]: Finished difference Result 8127 states and 20029 transitions. [2021-06-05 03:50:21,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 03:50:21,090 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 03:50:21,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:50:21,096 INFO L225 Difference]: With dead ends: 8127 [2021-06-05 03:50:21,097 INFO L226 Difference]: Without dead ends: 8117 [2021-06-05 03:50:21,097 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 58.6ms TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:50:21,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8117 states. [2021-06-05 03:50:21,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8117 to 6179. [2021-06-05 03:50:21,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6179 states, 6178 states have (on average 2.6264163159598577) internal successors, (16226), 6178 states have internal predecessors, (16226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:21,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6179 states to 6179 states and 16226 transitions. [2021-06-05 03:50:21,163 INFO L78 Accepts]: Start accepts. Automaton has 6179 states and 16226 transitions. Word has length 47 [2021-06-05 03:50:21,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:50:21,163 INFO L482 AbstractCegarLoop]: Abstraction has 6179 states and 16226 transitions. [2021-06-05 03:50:21,163 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:21,163 INFO L276 IsEmpty]: Start isEmpty. Operand 6179 states and 16226 transitions. [2021-06-05 03:50:21,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 03:50:21,168 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:50:21,169 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:50:21,376 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable362,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:50:21,377 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:50:21,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:50:21,377 INFO L82 PathProgramCache]: Analyzing trace with hash 800939048, now seen corresponding path program 40 times [2021-06-05 03:50:21,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:50:21,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780347845] [2021-06-05 03:50:21,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:50:21,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:50:21,426 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 59 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:50:21,426 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:50:21,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780347845] [2021-06-05 03:50:21,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780347845] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:21,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920318875] [2021-06-05 03:50:21,426 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:50:21,449 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:50:21,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:50:21,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 03:50:21,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:50:21,528 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 60 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:50:21,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920318875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:21,529 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:50:21,529 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 10 [2021-06-05 03:50:21,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853343623] [2021-06-05 03:50:21,529 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 03:50:21,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:50:21,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 03:50:21,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-06-05 03:50:21,529 INFO L87 Difference]: Start difference. First operand 6179 states and 16226 transitions. Second operand has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:21,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:50:21,682 INFO L93 Difference]: Finished difference Result 9199 states and 22998 transitions. [2021-06-05 03:50:21,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 03:50:21,683 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 03:50:21,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:50:21,692 INFO L225 Difference]: With dead ends: 9199 [2021-06-05 03:50:21,692 INFO L226 Difference]: Without dead ends: 9199 [2021-06-05 03:50:21,692 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 55.0ms TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:50:21,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9199 states. [2021-06-05 03:50:21,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9199 to 6799. [2021-06-05 03:50:21,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6799 states, 6798 states have (on average 2.674315975286849) internal successors, (18180), 6798 states have internal predecessors, (18180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:21,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6799 states to 6799 states and 18180 transitions. [2021-06-05 03:50:21,773 INFO L78 Accepts]: Start accepts. Automaton has 6799 states and 18180 transitions. Word has length 47 [2021-06-05 03:50:21,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:50:21,774 INFO L482 AbstractCegarLoop]: Abstraction has 6799 states and 18180 transitions. [2021-06-05 03:50:21,774 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:21,774 INFO L276 IsEmpty]: Start isEmpty. Operand 6799 states and 18180 transitions. [2021-06-05 03:50:21,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 03:50:21,778 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:50:21,778 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:50:21,978 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable365 [2021-06-05 03:50:21,978 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:50:21,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:50:21,978 INFO L82 PathProgramCache]: Analyzing trace with hash 267073672, now seen corresponding path program 95 times [2021-06-05 03:50:21,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:50:21,978 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416356410] [2021-06-05 03:50:21,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:50:21,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:50:22,034 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 48 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:50:22,034 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:50:22,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416356410] [2021-06-05 03:50:22,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416356410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:22,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855106317] [2021-06-05 03:50:22,034 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:50:22,059 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 03:50:22,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:50:22,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 03:50:22,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:50:22,148 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 49 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:50:22,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855106317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:22,148 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:50:22,148 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 15 [2021-06-05 03:50:22,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782555381] [2021-06-05 03:50:22,149 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:50:22,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:50:22,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:50:22,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:50:22,149 INFO L87 Difference]: Start difference. First operand 6799 states and 18180 transitions. Second operand has 16 states, 16 states have (on average 4.5) internal successors, (72), 15 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:22,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:50:22,353 INFO L93 Difference]: Finished difference Result 7639 states and 19695 transitions. [2021-06-05 03:50:22,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 03:50:22,353 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.5) internal successors, (72), 15 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 03:50:22,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:50:22,361 INFO L225 Difference]: With dead ends: 7639 [2021-06-05 03:50:22,361 INFO L226 Difference]: Without dead ends: 7633 [2021-06-05 03:50:22,361 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 76.7ms TimeCoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:50:22,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7633 states. [2021-06-05 03:50:22,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7633 to 6743. [2021-06-05 03:50:22,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6743 states, 6742 states have (on average 2.6702758825274397) internal successors, (18003), 6742 states have internal predecessors, (18003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:22,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6743 states to 6743 states and 18003 transitions. [2021-06-05 03:50:22,453 INFO L78 Accepts]: Start accepts. Automaton has 6743 states and 18003 transitions. Word has length 47 [2021-06-05 03:50:22,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:50:22,453 INFO L482 AbstractCegarLoop]: Abstraction has 6743 states and 18003 transitions. [2021-06-05 03:50:22,453 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.5) internal successors, (72), 15 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:22,453 INFO L276 IsEmpty]: Start isEmpty. Operand 6743 states and 18003 transitions. [2021-06-05 03:50:22,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 03:50:22,458 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:50:22,458 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:50:22,659 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable366 [2021-06-05 03:50:22,659 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:50:22,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:50:22,659 INFO L82 PathProgramCache]: Analyzing trace with hash -38499627, now seen corresponding path program 41 times [2021-06-05 03:50:22,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:50:22,659 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058295543] [2021-06-05 03:50:22,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:50:22,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:50:22,723 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 87 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:50:22,723 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:50:22,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058295543] [2021-06-05 03:50:22,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058295543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:22,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109776116] [2021-06-05 03:50:22,723 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:50:22,750 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-05 03:50:22,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:50:22,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 03:50:22,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:50:22,812 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 88 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:50:22,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109776116] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:22,813 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:50:22,813 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 03:50:22,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542937019] [2021-06-05 03:50:22,813 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 03:50:22,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:50:22,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 03:50:22,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-05 03:50:22,813 INFO L87 Difference]: Start difference. First operand 6743 states and 18003 transitions. Second operand has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:23,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:50:23,088 INFO L93 Difference]: Finished difference Result 7999 states and 20457 transitions. [2021-06-05 03:50:23,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 03:50:23,088 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 03:50:23,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:50:23,095 INFO L225 Difference]: With dead ends: 7999 [2021-06-05 03:50:23,095 INFO L226 Difference]: Without dead ends: 7961 [2021-06-05 03:50:23,095 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 93.8ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:50:23,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7961 states. [2021-06-05 03:50:23,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7961 to 6838. [2021-06-05 03:50:23,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6838 states, 6837 states have (on average 2.6676905075325434) internal successors, (18239), 6837 states have internal predecessors, (18239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:23,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6838 states to 6838 states and 18239 transitions. [2021-06-05 03:50:23,175 INFO L78 Accepts]: Start accepts. Automaton has 6838 states and 18239 transitions. Word has length 47 [2021-06-05 03:50:23,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:50:23,175 INFO L482 AbstractCegarLoop]: Abstraction has 6838 states and 18239 transitions. [2021-06-05 03:50:23,175 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:23,175 INFO L276 IsEmpty]: Start isEmpty. Operand 6838 states and 18239 transitions. [2021-06-05 03:50:23,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 03:50:23,179 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:50:23,179 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:50:23,379 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable369,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:50:23,379 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:50:23,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:50:23,380 INFO L82 PathProgramCache]: Analyzing trace with hash -1592196484, now seen corresponding path program 96 times [2021-06-05 03:50:23,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:50:23,380 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77537759] [2021-06-05 03:50:23,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:50:23,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:50:23,421 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 45 proven. 49 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 03:50:23,421 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:50:23,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77537759] [2021-06-05 03:50:23,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77537759] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:23,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221386952] [2021-06-05 03:50:23,421 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:50:23,448 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 03:50:23,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:50:23,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 03:50:23,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:50:23,510 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 45 proven. 49 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 03:50:23,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221386952] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:23,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:50:23,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-05 03:50:23,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927742036] [2021-06-05 03:50:23,511 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 03:50:23,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:50:23,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 03:50:23,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-05 03:50:23,511 INFO L87 Difference]: Start difference. First operand 6838 states and 18239 transitions. Second operand has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:23,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:50:23,624 INFO L93 Difference]: Finished difference Result 7980 states and 20237 transitions. [2021-06-05 03:50:23,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 03:50:23,625 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 03:50:23,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:50:23,632 INFO L225 Difference]: With dead ends: 7980 [2021-06-05 03:50:23,632 INFO L226 Difference]: Without dead ends: 7977 [2021-06-05 03:50:23,632 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 37.9ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-06-05 03:50:23,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7977 states. [2021-06-05 03:50:23,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7977 to 6818. [2021-06-05 03:50:23,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6818 states, 6817 states have (on average 2.664661874724952) internal successors, (18165), 6817 states have internal predecessors, (18165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:23,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6818 states to 6818 states and 18165 transitions. [2021-06-05 03:50:23,728 INFO L78 Accepts]: Start accepts. Automaton has 6818 states and 18165 transitions. Word has length 47 [2021-06-05 03:50:23,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:50:23,728 INFO L482 AbstractCegarLoop]: Abstraction has 6818 states and 18165 transitions. [2021-06-05 03:50:23,728 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:23,728 INFO L276 IsEmpty]: Start isEmpty. Operand 6818 states and 18165 transitions. [2021-06-05 03:50:23,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 03:50:23,732 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:50:23,732 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:50:23,933 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable370 [2021-06-05 03:50:23,933 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:50:23,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:50:23,933 INFO L82 PathProgramCache]: Analyzing trace with hash -1385133918, now seen corresponding path program 97 times [2021-06-05 03:50:23,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:50:23,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030401065] [2021-06-05 03:50:23,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:50:23,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:50:23,982 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 42 proven. 52 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 03:50:23,982 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:50:23,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030401065] [2021-06-05 03:50:23,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030401065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:23,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946476377] [2021-06-05 03:50:23,982 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:50:24,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:50:24,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 03:50:24,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:50:24,076 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 42 proven. 52 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 03:50:24,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946476377] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:24,076 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:50:24,076 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 03:50:24,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430236411] [2021-06-05 03:50:24,076 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 03:50:24,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:50:24,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 03:50:24,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 03:50:24,076 INFO L87 Difference]: Start difference. First operand 6818 states and 18165 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:24,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:50:24,212 INFO L93 Difference]: Finished difference Result 7990 states and 20202 transitions. [2021-06-05 03:50:24,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 03:50:24,212 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 03:50:24,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:50:24,219 INFO L225 Difference]: With dead ends: 7990 [2021-06-05 03:50:24,219 INFO L226 Difference]: Without dead ends: 7972 [2021-06-05 03:50:24,219 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 59.1ms TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:50:24,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7972 states. [2021-06-05 03:50:24,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7972 to 6576. [2021-06-05 03:50:24,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6576 states, 6575 states have (on average 2.6518631178707226) internal successors, (17436), 6575 states have internal predecessors, (17436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:24,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6576 states to 6576 states and 17436 transitions. [2021-06-05 03:50:24,294 INFO L78 Accepts]: Start accepts. Automaton has 6576 states and 17436 transitions. Word has length 47 [2021-06-05 03:50:24,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:50:24,294 INFO L482 AbstractCegarLoop]: Abstraction has 6576 states and 17436 transitions. [2021-06-05 03:50:24,294 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:24,294 INFO L276 IsEmpty]: Start isEmpty. Operand 6576 states and 17436 transitions. [2021-06-05 03:50:24,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 03:50:24,298 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:50:24,298 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:50:24,498 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable372,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:50:24,499 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:50:24,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:50:24,499 INFO L82 PathProgramCache]: Analyzing trace with hash 1461833365, now seen corresponding path program 98 times [2021-06-05 03:50:24,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:50:24,499 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951170781] [2021-06-05 03:50:24,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:50:24,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:50:24,559 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 16 proven. 78 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:50:24,559 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:50:24,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951170781] [2021-06-05 03:50:24,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951170781] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:24,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402438302] [2021-06-05 03:50:24,559 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:50:24,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:50:24,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:50:24,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 03:50:24,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:50:24,658 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 11 proven. 83 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:50:24,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402438302] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:24,658 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:50:24,658 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 03:50:24,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185434973] [2021-06-05 03:50:24,659 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 03:50:24,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:50:24,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 03:50:24,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-05 03:50:24,659 INFO L87 Difference]: Start difference. First operand 6576 states and 17436 transitions. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:25,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:50:25,060 INFO L93 Difference]: Finished difference Result 7270 states and 18664 transitions. [2021-06-05 03:50:25,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 03:50:25,061 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 03:50:25,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:50:25,067 INFO L225 Difference]: With dead ends: 7270 [2021-06-05 03:50:25,067 INFO L226 Difference]: Without dead ends: 7232 [2021-06-05 03:50:25,068 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 95.6ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:50:25,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7232 states. [2021-06-05 03:50:25,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7232 to 6547. [2021-06-05 03:50:25,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6547 states, 6546 states have (on average 2.6515429269783075) internal successors, (17357), 6546 states have internal predecessors, (17357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:25,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6547 states to 6547 states and 17357 transitions. [2021-06-05 03:50:25,139 INFO L78 Accepts]: Start accepts. Automaton has 6547 states and 17357 transitions. Word has length 47 [2021-06-05 03:50:25,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:50:25,139 INFO L482 AbstractCegarLoop]: Abstraction has 6547 states and 17357 transitions. [2021-06-05 03:50:25,139 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:25,139 INFO L276 IsEmpty]: Start isEmpty. Operand 6547 states and 17357 transitions. [2021-06-05 03:50:25,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 03:50:25,143 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:50:25,144 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:50:25,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable375 [2021-06-05 03:50:25,344 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:50:25,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:50:25,344 INFO L82 PathProgramCache]: Analyzing trace with hash 848297185, now seen corresponding path program 99 times [2021-06-05 03:50:25,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:50:25,344 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562797537] [2021-06-05 03:50:25,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:50:25,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:50:25,409 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 79 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 03:50:25,409 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:50:25,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562797537] [2021-06-05 03:50:25,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562797537] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:25,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829401969] [2021-06-05 03:50:25,409 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:50:25,437 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-05 03:50:25,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:50:25,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 03:50:25,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:50:25,498 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 80 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 03:50:25,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829401969] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:25,499 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:50:25,499 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 03:50:25,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594970788] [2021-06-05 03:50:25,499 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 03:50:25,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:50:25,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 03:50:25,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-05 03:50:25,499 INFO L87 Difference]: Start difference. First operand 6547 states and 17357 transitions. Second operand has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:25,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:50:25,786 INFO L93 Difference]: Finished difference Result 7510 states and 19214 transitions. [2021-06-05 03:50:25,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 03:50:25,786 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 03:50:25,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:50:25,794 INFO L225 Difference]: With dead ends: 7510 [2021-06-05 03:50:25,794 INFO L226 Difference]: Without dead ends: 7498 [2021-06-05 03:50:25,794 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 95.0ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:50:25,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7498 states. [2021-06-05 03:50:25,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7498 to 6557. [2021-06-05 03:50:25,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6557 states, 6556 states have (on average 2.6505491153142158) internal successors, (17377), 6556 states have internal predecessors, (17377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:25,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6557 states to 6557 states and 17377 transitions. [2021-06-05 03:50:25,867 INFO L78 Accepts]: Start accepts. Automaton has 6557 states and 17377 transitions. Word has length 47 [2021-06-05 03:50:25,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:50:25,867 INFO L482 AbstractCegarLoop]: Abstraction has 6557 states and 17377 transitions. [2021-06-05 03:50:25,867 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:25,867 INFO L276 IsEmpty]: Start isEmpty. Operand 6557 states and 17377 transitions. [2021-06-05 03:50:25,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 03:50:25,871 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:50:25,871 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:50:26,071 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 191 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable376 [2021-06-05 03:50:26,072 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:50:26,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:50:26,072 INFO L82 PathProgramCache]: Analyzing trace with hash -1304752777, now seen corresponding path program 100 times [2021-06-05 03:50:26,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:50:26,072 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724081188] [2021-06-05 03:50:26,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:50:26,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:50:26,135 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:50:26,136 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:50:26,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724081188] [2021-06-05 03:50:26,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724081188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:26,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130434365] [2021-06-05 03:50:26,136 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:50:26,160 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:50:26,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:50:26,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 03:50:26,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:50:26,223 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:50:26,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130434365] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:26,223 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:50:26,223 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 03:50:26,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938385167] [2021-06-05 03:50:26,223 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 03:50:26,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:50:26,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 03:50:26,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-05 03:50:26,224 INFO L87 Difference]: Start difference. First operand 6557 states and 17377 transitions. Second operand has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:26,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:50:26,590 INFO L93 Difference]: Finished difference Result 8002 states and 20257 transitions. [2021-06-05 03:50:26,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 03:50:26,591 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 03:50:26,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:50:26,598 INFO L225 Difference]: With dead ends: 8002 [2021-06-05 03:50:26,598 INFO L226 Difference]: Without dead ends: 7990 [2021-06-05 03:50:26,598 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 120.1ms TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:50:26,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7990 states. [2021-06-05 03:50:26,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7990 to 6589. [2021-06-05 03:50:26,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6589 states, 6588 states have (on average 2.6495142683667274) internal successors, (17455), 6588 states have internal predecessors, (17455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:26,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6589 states to 6589 states and 17455 transitions. [2021-06-05 03:50:26,668 INFO L78 Accepts]: Start accepts. Automaton has 6589 states and 17455 transitions. Word has length 47 [2021-06-05 03:50:26,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:50:26,668 INFO L482 AbstractCegarLoop]: Abstraction has 6589 states and 17455 transitions. [2021-06-05 03:50:26,668 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:26,668 INFO L276 IsEmpty]: Start isEmpty. Operand 6589 states and 17455 transitions. [2021-06-05 03:50:26,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 03:50:26,672 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:50:26,672 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:50:26,873 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 192 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable377 [2021-06-05 03:50:26,873 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:50:26,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:50:26,873 INFO L82 PathProgramCache]: Analyzing trace with hash -1542814294, now seen corresponding path program 42 times [2021-06-05 03:50:26,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:50:26,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723184075] [2021-06-05 03:50:26,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:50:26,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:50:26,919 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 63 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:50:26,919 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:50:26,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723184075] [2021-06-05 03:50:26,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723184075] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:26,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857843062] [2021-06-05 03:50:26,919 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:50:26,945 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 03:50:26,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:50:26,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 03:50:26,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:50:27,048 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 64 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:50:27,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857843062] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:27,048 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:50:27,048 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 14] total 16 [2021-06-05 03:50:27,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334625528] [2021-06-05 03:50:27,048 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 03:50:27,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:50:27,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 03:50:27,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:50:27,049 INFO L87 Difference]: Start difference. First operand 6589 states and 17455 transitions. Second operand has 17 states, 17 states have (on average 3.764705882352941) internal successors, (64), 16 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:27,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:50:27,279 INFO L93 Difference]: Finished difference Result 9290 states and 23114 transitions. [2021-06-05 03:50:27,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 03:50:27,279 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.764705882352941) internal successors, (64), 16 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 03:50:27,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:50:27,288 INFO L225 Difference]: With dead ends: 9290 [2021-06-05 03:50:27,288 INFO L226 Difference]: Without dead ends: 9268 [2021-06-05 03:50:27,288 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 117.3ms TimeCoverageRelationStatistics Valid=175, Invalid=287, Unknown=0, NotChecked=0, Total=462 [2021-06-05 03:50:27,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9268 states. [2021-06-05 03:50:27,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9268 to 6764. [2021-06-05 03:50:27,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6764 states, 6763 states have (on average 2.6578441520035487) internal successors, (17975), 6763 states have internal predecessors, (17975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:27,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6764 states to 6764 states and 17975 transitions. [2021-06-05 03:50:27,369 INFO L78 Accepts]: Start accepts. Automaton has 6764 states and 17975 transitions. Word has length 47 [2021-06-05 03:50:27,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:50:27,369 INFO L482 AbstractCegarLoop]: Abstraction has 6764 states and 17975 transitions. [2021-06-05 03:50:27,369 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.764705882352941) internal successors, (64), 16 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:27,369 INFO L276 IsEmpty]: Start isEmpty. Operand 6764 states and 17975 transitions. [2021-06-05 03:50:27,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 03:50:27,373 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:50:27,373 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:50:27,573 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable378 [2021-06-05 03:50:27,574 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:50:27,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:50:27,574 INFO L82 PathProgramCache]: Analyzing trace with hash 2130272592, now seen corresponding path program 43 times [2021-06-05 03:50:27,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:50:27,574 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275276091] [2021-06-05 03:50:27,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:50:27,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:50:27,622 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 63 proven. 34 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:50:27,622 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:50:27,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275276091] [2021-06-05 03:50:27,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275276091] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:27,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041882252] [2021-06-05 03:50:27,622 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:50:27,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:50:27,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 03:50:27,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:50:27,711 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 64 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:50:27,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041882252] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:27,711 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:50:27,711 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 10 [2021-06-05 03:50:27,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613031035] [2021-06-05 03:50:27,711 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 03:50:27,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:50:27,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 03:50:27,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-06-05 03:50:27,712 INFO L87 Difference]: Start difference. First operand 6764 states and 17975 transitions. Second operand has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:27,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:50:27,876 INFO L93 Difference]: Finished difference Result 9757 states and 24151 transitions. [2021-06-05 03:50:27,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 03:50:27,876 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 03:50:27,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:50:27,884 INFO L225 Difference]: With dead ends: 9757 [2021-06-05 03:50:27,884 INFO L226 Difference]: Without dead ends: 9757 [2021-06-05 03:50:27,885 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 57.0ms TimeCoverageRelationStatistics Valid=65, Invalid=91, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:50:27,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9757 states. [2021-06-05 03:50:27,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9757 to 6769. [2021-06-05 03:50:27,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6769 states, 6768 states have (on average 2.6569148936170213) internal successors, (17982), 6768 states have internal predecessors, (17982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:27,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6769 states to 6769 states and 17982 transitions. [2021-06-05 03:50:27,965 INFO L78 Accepts]: Start accepts. Automaton has 6769 states and 17982 transitions. Word has length 47 [2021-06-05 03:50:27,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:50:27,965 INFO L482 AbstractCegarLoop]: Abstraction has 6769 states and 17982 transitions. [2021-06-05 03:50:27,965 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:27,965 INFO L276 IsEmpty]: Start isEmpty. Operand 6769 states and 17982 transitions. [2021-06-05 03:50:27,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 03:50:27,969 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:50:27,969 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:50:28,170 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable379,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:50:28,170 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:50:28,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:50:28,170 INFO L82 PathProgramCache]: Analyzing trace with hash 492700136, now seen corresponding path program 44 times [2021-06-05 03:50:28,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:50:28,170 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420024399] [2021-06-05 03:50:28,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:50:28,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:50:28,224 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 60 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:50:28,224 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:50:28,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420024399] [2021-06-05 03:50:28,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420024399] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:28,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773216138] [2021-06-05 03:50:28,225 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:50:28,248 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:50:28,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:50:28,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 03:50:28,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:50:28,327 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 61 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:50:28,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773216138] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:28,327 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:50:28,327 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 11 [2021-06-05 03:50:28,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049771500] [2021-06-05 03:50:28,328 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 03:50:28,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:50:28,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 03:50:28,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:50:28,328 INFO L87 Difference]: Start difference. First operand 6769 states and 17982 transitions. Second operand has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:28,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:50:28,518 INFO L93 Difference]: Finished difference Result 8996 states and 22443 transitions. [2021-06-05 03:50:28,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 03:50:28,519 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 03:50:28,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:50:28,527 INFO L225 Difference]: With dead ends: 8996 [2021-06-05 03:50:28,527 INFO L226 Difference]: Without dead ends: 8996 [2021-06-05 03:50:28,527 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 72.9ms TimeCoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:50:28,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8996 states. [2021-06-05 03:50:28,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8996 to 6596. [2021-06-05 03:50:28,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6596 states, 6595 states have (on average 2.650037907505686) internal successors, (17477), 6595 states have internal predecessors, (17477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:28,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6596 states to 6596 states and 17477 transitions. [2021-06-05 03:50:28,605 INFO L78 Accepts]: Start accepts. Automaton has 6596 states and 17477 transitions. Word has length 47 [2021-06-05 03:50:28,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:50:28,605 INFO L482 AbstractCegarLoop]: Abstraction has 6596 states and 17477 transitions. [2021-06-05 03:50:28,605 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:28,605 INFO L276 IsEmpty]: Start isEmpty. Operand 6596 states and 17477 transitions. [2021-06-05 03:50:28,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 03:50:28,609 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:50:28,609 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:50:28,809 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable380 [2021-06-05 03:50:28,809 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:50:28,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:50:28,810 INFO L82 PathProgramCache]: Analyzing trace with hash 227806332, now seen corresponding path program 101 times [2021-06-05 03:50:28,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:50:28,810 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607756674] [2021-06-05 03:50:28,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:50:28,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:50:28,864 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 44 proven. 54 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:50:28,864 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:50:28,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607756674] [2021-06-05 03:50:28,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607756674] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:28,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840933276] [2021-06-05 03:50:28,865 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:50:28,889 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 03:50:28,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:50:28,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 03:50:28,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:50:28,973 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 45 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:50:28,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840933276] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:28,973 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:50:28,973 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2021-06-05 03:50:28,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243752990] [2021-06-05 03:50:28,974 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:50:28,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:50:28,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:50:28,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:50:28,974 INFO L87 Difference]: Start difference. First operand 6596 states and 17477 transitions. Second operand has 16 states, 16 states have (on average 4.375) internal successors, (70), 15 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:29,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:50:29,170 INFO L93 Difference]: Finished difference Result 7771 states and 19586 transitions. [2021-06-05 03:50:29,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 03:50:29,170 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.375) internal successors, (70), 15 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 03:50:29,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:50:29,177 INFO L225 Difference]: With dead ends: 7771 [2021-06-05 03:50:29,177 INFO L226 Difference]: Without dead ends: 7753 [2021-06-05 03:50:29,177 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 107.7ms TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:50:29,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7753 states. [2021-06-05 03:50:29,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7753 to 6596. [2021-06-05 03:50:29,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6596 states, 6595 states have (on average 2.648521607278241) internal successors, (17467), 6595 states have internal predecessors, (17467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:29,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6596 states to 6596 states and 17467 transitions. [2021-06-05 03:50:29,246 INFO L78 Accepts]: Start accepts. Automaton has 6596 states and 17467 transitions. Word has length 47 [2021-06-05 03:50:29,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:50:29,246 INFO L482 AbstractCegarLoop]: Abstraction has 6596 states and 17467 transitions. [2021-06-05 03:50:29,246 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.375) internal successors, (70), 15 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:29,246 INFO L276 IsEmpty]: Start isEmpty. Operand 6596 states and 17467 transitions. [2021-06-05 03:50:29,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 03:50:29,250 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:50:29,250 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:50:29,450 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable381,196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:50:29,451 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:50:29,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:50:29,451 INFO L82 PathProgramCache]: Analyzing trace with hash -866264581, now seen corresponding path program 45 times [2021-06-05 03:50:29,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:50:29,451 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872459538] [2021-06-05 03:50:29,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:50:29,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:50:29,514 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 87 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:50:29,514 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:50:29,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872459538] [2021-06-05 03:50:29,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872459538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:29,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56572922] [2021-06-05 03:50:29,515 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:50:29,542 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-05 03:50:29,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:50:29,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 03:50:29,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:50:29,711 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:50:29,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56572922] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:29,711 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:50:29,711 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 21 [2021-06-05 03:50:29,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770313131] [2021-06-05 03:50:29,711 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 03:50:29,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:50:29,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 03:50:29,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2021-06-05 03:50:29,711 INFO L87 Difference]: Start difference. First operand 6596 states and 17467 transitions. Second operand has 22 states, 22 states have (on average 3.8636363636363638) internal successors, (85), 21 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:30,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:50:30,707 INFO L93 Difference]: Finished difference Result 8359 states and 20936 transitions. [2021-06-05 03:50:30,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 03:50:30,707 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.8636363636363638) internal successors, (85), 21 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 03:50:30,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:50:30,715 INFO L225 Difference]: With dead ends: 8359 [2021-06-05 03:50:30,715 INFO L226 Difference]: Without dead ends: 8301 [2021-06-05 03:50:30,715 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 316.4ms TimeCoverageRelationStatistics Valid=162, Invalid=1478, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 03:50:30,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8301 states. [2021-06-05 03:50:30,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8301 to 6703. [2021-06-05 03:50:30,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6703 states, 6702 states have (on average 2.645777379886601) internal successors, (17732), 6702 states have internal predecessors, (17732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:30,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6703 states to 6703 states and 17732 transitions. [2021-06-05 03:50:30,790 INFO L78 Accepts]: Start accepts. Automaton has 6703 states and 17732 transitions. Word has length 47 [2021-06-05 03:50:30,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:50:30,790 INFO L482 AbstractCegarLoop]: Abstraction has 6703 states and 17732 transitions. [2021-06-05 03:50:30,790 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.8636363636363638) internal successors, (85), 21 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:30,790 INFO L276 IsEmpty]: Start isEmpty. Operand 6703 states and 17732 transitions. [2021-06-05 03:50:30,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 03:50:30,794 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:50:30,794 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:50:30,995 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable385 [2021-06-05 03:50:30,995 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:50:30,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:50:30,995 INFO L82 PathProgramCache]: Analyzing trace with hash 634068411, now seen corresponding path program 102 times [2021-06-05 03:50:30,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:50:30,995 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271122551] [2021-06-05 03:50:30,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:50:30,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:50:31,065 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 16 proven. 78 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:50:31,065 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:50:31,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271122551] [2021-06-05 03:50:31,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271122551] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:31,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241051349] [2021-06-05 03:50:31,065 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:50:31,092 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-05 03:50:31,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:50:31,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 03:50:31,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:50:31,168 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 11 proven. 83 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:50:31,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241051349] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:31,168 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:50:31,168 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 03:50:31,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068332033] [2021-06-05 03:50:31,169 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 03:50:31,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:50:31,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 03:50:31,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-05 03:50:31,169 INFO L87 Difference]: Start difference. First operand 6703 states and 17732 transitions. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:31,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:50:31,558 INFO L93 Difference]: Finished difference Result 7388 states and 18942 transitions. [2021-06-05 03:50:31,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 03:50:31,558 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 03:50:31,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:50:31,565 INFO L225 Difference]: With dead ends: 7388 [2021-06-05 03:50:31,565 INFO L226 Difference]: Without dead ends: 7332 [2021-06-05 03:50:31,565 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 96.7ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:50:31,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7332 states. [2021-06-05 03:50:31,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7332 to 6671. [2021-06-05 03:50:31,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6671 states, 6670 states have (on average 2.643478260869565) internal successors, (17632), 6670 states have internal predecessors, (17632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:31,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6671 states to 6671 states and 17632 transitions. [2021-06-05 03:50:31,634 INFO L78 Accepts]: Start accepts. Automaton has 6671 states and 17632 transitions. Word has length 47 [2021-06-05 03:50:31,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:50:31,634 INFO L482 AbstractCegarLoop]: Abstraction has 6671 states and 17632 transitions. [2021-06-05 03:50:31,634 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:31,634 INFO L276 IsEmpty]: Start isEmpty. Operand 6671 states and 17632 transitions. [2021-06-05 03:50:31,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 03:50:31,638 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:50:31,638 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:50:31,839 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable386 [2021-06-05 03:50:31,839 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:50:31,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:50:31,839 INFO L82 PathProgramCache]: Analyzing trace with hash 20532231, now seen corresponding path program 103 times [2021-06-05 03:50:31,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:50:31,839 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671461926] [2021-06-05 03:50:31,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:50:31,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:50:31,929 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 79 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 03:50:31,929 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:50:31,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671461926] [2021-06-05 03:50:31,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671461926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:31,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531418170] [2021-06-05 03:50:31,929 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:50:31,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:50:31,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 03:50:31,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:50:32,014 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 80 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 03:50:32,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531418170] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:32,014 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:50:32,014 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 03:50:32,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578379746] [2021-06-05 03:50:32,015 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 03:50:32,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:50:32,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 03:50:32,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-05 03:50:32,015 INFO L87 Difference]: Start difference. First operand 6671 states and 17632 transitions. Second operand has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:32,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:50:32,313 INFO L93 Difference]: Finished difference Result 7705 states and 19640 transitions. [2021-06-05 03:50:32,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 03:50:32,313 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 03:50:32,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:50:32,319 INFO L225 Difference]: With dead ends: 7705 [2021-06-05 03:50:32,320 INFO L226 Difference]: Without dead ends: 7693 [2021-06-05 03:50:32,320 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 120.2ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:50:32,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7693 states. [2021-06-05 03:50:32,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7693 to 6695. [2021-06-05 03:50:32,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6695 states, 6694 states have (on average 2.642067523155064) internal successors, (17686), 6694 states have internal predecessors, (17686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:32,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6695 states to 6695 states and 17686 transitions. [2021-06-05 03:50:32,391 INFO L78 Accepts]: Start accepts. Automaton has 6695 states and 17686 transitions. Word has length 47 [2021-06-05 03:50:32,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:50:32,392 INFO L482 AbstractCegarLoop]: Abstraction has 6695 states and 17686 transitions. [2021-06-05 03:50:32,392 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:32,392 INFO L276 IsEmpty]: Start isEmpty. Operand 6695 states and 17686 transitions. [2021-06-05 03:50:32,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 03:50:32,396 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:50:32,396 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:50:32,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable387,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:50:32,596 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:50:32,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:50:32,596 INFO L82 PathProgramCache]: Analyzing trace with hash -136767256, now seen corresponding path program 46 times [2021-06-05 03:50:32,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:50:32,596 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768877149] [2021-06-05 03:50:32,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:50:32,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:50:32,644 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 58 proven. 39 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:50:32,644 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:50:32,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768877149] [2021-06-05 03:50:32,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768877149] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:32,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880811945] [2021-06-05 03:50:32,644 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:50:32,667 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:50:32,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:50:32,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 03:50:32,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:50:32,729 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 60 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:50:32,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880811945] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:32,730 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:50:32,730 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 10 [2021-06-05 03:50:32,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220594760] [2021-06-05 03:50:32,730 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 03:50:32,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:50:32,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 03:50:32,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-06-05 03:50:32,730 INFO L87 Difference]: Start difference. First operand 6695 states and 17686 transitions. Second operand has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:32,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:50:32,877 INFO L93 Difference]: Finished difference Result 8625 states and 21596 transitions. [2021-06-05 03:50:32,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 03:50:32,877 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 03:50:32,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:50:32,885 INFO L225 Difference]: With dead ends: 8625 [2021-06-05 03:50:32,885 INFO L226 Difference]: Without dead ends: 8605 [2021-06-05 03:50:32,886 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 61.2ms TimeCoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:50:32,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8605 states. [2021-06-05 03:50:32,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8605 to 6862. [2021-06-05 03:50:32,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6862 states, 6861 states have (on average 2.6453869698294707) internal successors, (18150), 6861 states have internal predecessors, (18150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:32,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6862 states to 6862 states and 18150 transitions. [2021-06-05 03:50:32,965 INFO L78 Accepts]: Start accepts. Automaton has 6862 states and 18150 transitions. Word has length 47 [2021-06-05 03:50:32,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:50:32,965 INFO L482 AbstractCegarLoop]: Abstraction has 6862 states and 18150 transitions. [2021-06-05 03:50:32,965 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:32,965 INFO L276 IsEmpty]: Start isEmpty. Operand 6862 states and 18150 transitions. [2021-06-05 03:50:32,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 03:50:32,969 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:50:32,969 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:50:33,169 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable388 [2021-06-05 03:50:33,169 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:50:33,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:50:33,170 INFO L82 PathProgramCache]: Analyzing trace with hash -1627825272, now seen corresponding path program 104 times [2021-06-05 03:50:33,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:50:33,170 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087646509] [2021-06-05 03:50:33,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:50:33,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:50:33,215 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 33 proven. 63 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:50:33,215 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:50:33,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087646509] [2021-06-05 03:50:33,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087646509] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:33,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315329762] [2021-06-05 03:50:33,215 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:50:33,238 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:50:33,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:50:33,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 03:50:33,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:50:33,302 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 33 proven. 63 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:50:33,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315329762] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:33,302 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:50:33,302 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 03:50:33,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870983921] [2021-06-05 03:50:33,302 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 03:50:33,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:50:33,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 03:50:33,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 03:50:33,303 INFO L87 Difference]: Start difference. First operand 6862 states and 18150 transitions. Second operand has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:33,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:50:33,451 INFO L93 Difference]: Finished difference Result 8135 states and 20382 transitions. [2021-06-05 03:50:33,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 03:50:33,451 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 03:50:33,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:50:33,459 INFO L225 Difference]: With dead ends: 8135 [2021-06-05 03:50:33,459 INFO L226 Difference]: Without dead ends: 8117 [2021-06-05 03:50:33,460 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 56.8ms TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:50:33,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8117 states. [2021-06-05 03:50:33,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8117 to 6838. [2021-06-05 03:50:33,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6838 states, 6837 states have (on average 2.640485593096387) internal successors, (18053), 6837 states have internal predecessors, (18053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:33,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6838 states to 6838 states and 18053 transitions. [2021-06-05 03:50:33,540 INFO L78 Accepts]: Start accepts. Automaton has 6838 states and 18053 transitions. Word has length 47 [2021-06-05 03:50:33,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:50:33,540 INFO L482 AbstractCegarLoop]: Abstraction has 6838 states and 18053 transitions. [2021-06-05 03:50:33,540 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:33,540 INFO L276 IsEmpty]: Start isEmpty. Operand 6838 states and 18053 transitions. [2021-06-05 03:50:33,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 03:50:33,545 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:50:33,545 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:50:33,752 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable391,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:50:33,753 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:50:33,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:50:33,753 INFO L82 PathProgramCache]: Analyzing trace with hash -2132517731, now seen corresponding path program 105 times [2021-06-05 03:50:33,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:50:33,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141868343] [2021-06-05 03:50:33,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:50:33,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:50:33,816 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 81 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:50:33,816 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:50:33,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141868343] [2021-06-05 03:50:33,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141868343] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:33,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236425002] [2021-06-05 03:50:33,816 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:50:33,848 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-05 03:50:33,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:50:33,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 03:50:33,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:50:33,911 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 82 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:50:33,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236425002] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:33,911 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:50:33,911 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 03:50:33,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073642078] [2021-06-05 03:50:33,911 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 03:50:33,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:50:33,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 03:50:33,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-05 03:50:33,912 INFO L87 Difference]: Start difference. First operand 6838 states and 18053 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:34,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:50:34,320 INFO L93 Difference]: Finished difference Result 8679 states and 21810 transitions. [2021-06-05 03:50:34,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 03:50:34,320 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 03:50:34,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:50:34,329 INFO L225 Difference]: With dead ends: 8679 [2021-06-05 03:50:34,329 INFO L226 Difference]: Without dead ends: 8637 [2021-06-05 03:50:34,329 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 133.9ms TimeCoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:50:34,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8637 states. [2021-06-05 03:50:34,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8637 to 6900. [2021-06-05 03:50:34,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6900 states, 6899 states have (on average 2.6408175097840267) internal successors, (18219), 6899 states have internal predecessors, (18219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:34,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6900 states to 6900 states and 18219 transitions. [2021-06-05 03:50:34,433 INFO L78 Accepts]: Start accepts. Automaton has 6900 states and 18219 transitions. Word has length 47 [2021-06-05 03:50:34,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:50:34,433 INFO L482 AbstractCegarLoop]: Abstraction has 6900 states and 18219 transitions. [2021-06-05 03:50:34,433 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:34,433 INFO L276 IsEmpty]: Start isEmpty. Operand 6900 states and 18219 transitions. [2021-06-05 03:50:34,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 03:50:34,437 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:50:34,437 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:50:34,637 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable394,202 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:50:34,637 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:50:34,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:50:34,638 INFO L82 PathProgramCache]: Analyzing trace with hash -599958622, now seen corresponding path program 106 times [2021-06-05 03:50:34,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:50:34,638 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109713148] [2021-06-05 03:50:34,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:50:34,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:50:34,690 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 32 proven. 65 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:50:34,690 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:50:34,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109713148] [2021-06-05 03:50:34,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109713148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:34,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953445747] [2021-06-05 03:50:34,691 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:50:34,713 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:50:34,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:50:34,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 03:50:34,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:50:34,773 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 32 proven. 65 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:50:34,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953445747] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:34,773 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:50:34,773 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 03:50:34,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113236232] [2021-06-05 03:50:34,773 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 03:50:34,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:50:34,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 03:50:34,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-06-05 03:50:34,774 INFO L87 Difference]: Start difference. First operand 6900 states and 18219 transitions. Second operand has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:34,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:50:34,947 INFO L93 Difference]: Finished difference Result 8193 states and 20486 transitions. [2021-06-05 03:50:34,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 03:50:34,948 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 03:50:34,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:50:34,955 INFO L225 Difference]: With dead ends: 8193 [2021-06-05 03:50:34,955 INFO L226 Difference]: Without dead ends: 8169 [2021-06-05 03:50:34,955 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 64.1ms TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:50:34,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8169 states. [2021-06-05 03:50:35,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8169 to 6661. [2021-06-05 03:50:35,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6661 states, 6660 states have (on average 2.6294294294294294) internal successors, (17512), 6660 states have internal predecessors, (17512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:35,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6661 states to 6661 states and 17512 transitions. [2021-06-05 03:50:35,032 INFO L78 Accepts]: Start accepts. Automaton has 6661 states and 17512 transitions. Word has length 47 [2021-06-05 03:50:35,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:50:35,032 INFO L482 AbstractCegarLoop]: Abstraction has 6661 states and 17512 transitions. [2021-06-05 03:50:35,032 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:35,032 INFO L276 IsEmpty]: Start isEmpty. Operand 6661 states and 17512 transitions. [2021-06-05 03:50:35,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 03:50:35,037 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:50:35,037 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:50:35,237 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable395,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:50:35,237 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:50:35,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:50:35,237 INFO L82 PathProgramCache]: Analyzing trace with hash -1977681197, now seen corresponding path program 107 times [2021-06-05 03:50:35,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:50:35,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645990470] [2021-06-05 03:50:35,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:50:35,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:50:35,307 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:50:35,307 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:50:35,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645990470] [2021-06-05 03:50:35,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645990470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:35,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744343858] [2021-06-05 03:50:35,307 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:50:35,334 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-06-05 03:50:35,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:50:35,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 03:50:35,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:50:35,396 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:50:35,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744343858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:35,396 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:50:35,396 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 03:50:35,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393834380] [2021-06-05 03:50:35,396 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 03:50:35,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:50:35,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 03:50:35,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:50:35,397 INFO L87 Difference]: Start difference. First operand 6661 states and 17512 transitions. Second operand has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:35,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:50:35,793 INFO L93 Difference]: Finished difference Result 8662 states and 21553 transitions. [2021-06-05 03:50:35,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 03:50:35,793 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 03:50:35,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:50:35,801 INFO L225 Difference]: With dead ends: 8662 [2021-06-05 03:50:35,801 INFO L226 Difference]: Without dead ends: 8608 [2021-06-05 03:50:35,801 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 146.3ms TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-06-05 03:50:35,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8608 states. [2021-06-05 03:50:35,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8608 to 6632. [2021-06-05 03:50:35,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6632 states, 6631 states have (on average 2.625546674709697) internal successors, (17410), 6631 states have internal predecessors, (17410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:35,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6632 states to 6632 states and 17410 transitions. [2021-06-05 03:50:35,876 INFO L78 Accepts]: Start accepts. Automaton has 6632 states and 17410 transitions. Word has length 47 [2021-06-05 03:50:35,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:50:35,876 INFO L482 AbstractCegarLoop]: Abstraction has 6632 states and 17410 transitions. [2021-06-05 03:50:35,876 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:35,876 INFO L276 IsEmpty]: Start isEmpty. Operand 6632 states and 17410 transitions. [2021-06-05 03:50:35,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 03:50:35,880 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:50:35,880 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:50:36,081 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable399 [2021-06-05 03:50:36,081 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:50:36,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:50:36,081 INFO L82 PathProgramCache]: Analyzing trace with hash 1457344172, now seen corresponding path program 47 times [2021-06-05 03:50:36,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:50:36,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112146339] [2021-06-05 03:50:36,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:50:36,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:50:36,127 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 73 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:50:36,127 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:50:36,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112146339] [2021-06-05 03:50:36,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112146339] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:36,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660373395] [2021-06-05 03:50:36,127 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:50:36,155 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-05 03:50:36,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:50:36,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 03:50:36,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:50:36,271 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 75 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:50:36,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660373395] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:36,272 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:50:36,272 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 15] total 17 [2021-06-05 03:50:36,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635464490] [2021-06-05 03:50:36,272 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 03:50:36,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:50:36,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 03:50:36,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=192, Unknown=0, NotChecked=0, Total=306 [2021-06-05 03:50:36,272 INFO L87 Difference]: Start difference. First operand 6632 states and 17410 transitions. Second operand has 18 states, 18 states have (on average 3.6666666666666665) internal successors, (66), 17 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:36,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:50:36,569 INFO L93 Difference]: Finished difference Result 10971 states and 26933 transitions. [2021-06-05 03:50:36,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 03:50:36,569 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.6666666666666665) internal successors, (66), 17 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 03:50:36,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:50:36,579 INFO L225 Difference]: With dead ends: 10971 [2021-06-05 03:50:36,580 INFO L226 Difference]: Without dead ends: 10971 [2021-06-05 03:50:36,580 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 163.0ms TimeCoverageRelationStatistics Valid=221, Invalid=331, Unknown=0, NotChecked=0, Total=552 [2021-06-05 03:50:36,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10971 states. [2021-06-05 03:50:36,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10971 to 6822. [2021-06-05 03:50:36,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6822 states, 6821 states have (on average 2.637443190148072) internal successors, (17990), 6821 states have internal predecessors, (17990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:36,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6822 states to 6822 states and 17990 transitions. [2021-06-05 03:50:36,670 INFO L78 Accepts]: Start accepts. Automaton has 6822 states and 17990 transitions. Word has length 47 [2021-06-05 03:50:36,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:50:36,670 INFO L482 AbstractCegarLoop]: Abstraction has 6822 states and 17990 transitions. [2021-06-05 03:50:36,670 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.6666666666666665) internal successors, (66), 17 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:36,671 INFO L276 IsEmpty]: Start isEmpty. Operand 6822 states and 17990 transitions. [2021-06-05 03:50:36,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 03:50:36,675 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:50:36,675 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:50:36,875 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable400,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:50:36,875 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:50:36,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:50:36,876 INFO L82 PathProgramCache]: Analyzing trace with hash -180228284, now seen corresponding path program 48 times [2021-06-05 03:50:36,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:50:36,876 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650841453] [2021-06-05 03:50:36,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:50:36,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:50:36,930 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 71 proven. 26 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:50:36,930 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:50:36,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650841453] [2021-06-05 03:50:36,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650841453] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:36,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302685397] [2021-06-05 03:50:36,930 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:50:36,955 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-05 03:50:36,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:50:36,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 03:50:36,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:50:37,022 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 72 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:50:37,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302685397] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:37,023 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:50:37,023 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 11 [2021-06-05 03:50:37,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304561629] [2021-06-05 03:50:37,023 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 03:50:37,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:50:37,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 03:50:37,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:50:37,023 INFO L87 Difference]: Start difference. First operand 6822 states and 17990 transitions. Second operand has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:37,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:50:37,252 INFO L93 Difference]: Finished difference Result 10273 states and 25277 transitions. [2021-06-05 03:50:37,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 03:50:37,252 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 03:50:37,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:50:37,262 INFO L225 Difference]: With dead ends: 10273 [2021-06-05 03:50:37,262 INFO L226 Difference]: Without dead ends: 10273 [2021-06-05 03:50:37,262 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 85.9ms TimeCoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:50:37,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10273 states. [2021-06-05 03:50:37,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10273 to 6822. [2021-06-05 03:50:37,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6822 states, 6821 states have (on average 2.6365635537311243) internal successors, (17984), 6821 states have internal predecessors, (17984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:37,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6822 states to 6822 states and 17984 transitions. [2021-06-05 03:50:37,351 INFO L78 Accepts]: Start accepts. Automaton has 6822 states and 17984 transitions. Word has length 47 [2021-06-05 03:50:37,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:50:37,351 INFO L482 AbstractCegarLoop]: Abstraction has 6822 states and 17984 transitions. [2021-06-05 03:50:37,351 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:37,351 INFO L276 IsEmpty]: Start isEmpty. Operand 6822 states and 17984 transitions. [2021-06-05 03:50:37,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 03:50:37,355 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:50:37,355 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:50:37,555 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable401,206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:50:37,556 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:50:37,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:50:37,556 INFO L82 PathProgramCache]: Analyzing trace with hash -1870223448, now seen corresponding path program 49 times [2021-06-05 03:50:37,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:50:37,556 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013710112] [2021-06-05 03:50:37,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:50:37,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:50:37,618 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 61 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:50:37,618 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:50:37,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013710112] [2021-06-05 03:50:37,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013710112] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:37,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133665345] [2021-06-05 03:50:37,619 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:50:37,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:50:37,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 03:50:37,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:50:37,708 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 62 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:50:37,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133665345] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:37,708 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:50:37,708 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 12 [2021-06-05 03:50:37,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767683817] [2021-06-05 03:50:37,708 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 03:50:37,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:50:37,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 03:50:37,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:50:37,708 INFO L87 Difference]: Start difference. First operand 6822 states and 17984 transitions. Second operand has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:37,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:50:37,921 INFO L93 Difference]: Finished difference Result 8962 states and 22325 transitions. [2021-06-05 03:50:37,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 03:50:37,921 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 03:50:37,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:50:37,929 INFO L225 Difference]: With dead ends: 8962 [2021-06-05 03:50:37,930 INFO L226 Difference]: Without dead ends: 8962 [2021-06-05 03:50:37,930 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 96.0ms TimeCoverageRelationStatistics Valid=116, Invalid=190, Unknown=0, NotChecked=0, Total=306 [2021-06-05 03:50:37,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8962 states. [2021-06-05 03:50:37,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8962 to 6635. [2021-06-05 03:50:37,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6635 states, 6634 states have (on average 2.635061802833886) internal successors, (17481), 6634 states have internal predecessors, (17481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:38,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6635 states to 6635 states and 17481 transitions. [2021-06-05 03:50:38,007 INFO L78 Accepts]: Start accepts. Automaton has 6635 states and 17481 transitions. Word has length 47 [2021-06-05 03:50:38,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:50:38,007 INFO L482 AbstractCegarLoop]: Abstraction has 6635 states and 17481 transitions. [2021-06-05 03:50:38,007 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:38,007 INFO L276 IsEmpty]: Start isEmpty. Operand 6635 states and 17481 transitions. [2021-06-05 03:50:38,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 03:50:38,011 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:50:38,011 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:50:38,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable402 [2021-06-05 03:50:38,212 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:50:38,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:50:38,212 INFO L82 PathProgramCache]: Analyzing trace with hash -1591078520, now seen corresponding path program 108 times [2021-06-05 03:50:38,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:50:38,212 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976695793] [2021-06-05 03:50:38,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:50:38,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:50:38,272 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 37 proven. 61 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:50:38,272 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:50:38,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976695793] [2021-06-05 03:50:38,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976695793] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:38,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972759686] [2021-06-05 03:50:38,273 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:50:38,297 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 03:50:38,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:50:38,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 03:50:38,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:50:38,357 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 37 proven. 61 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:50:38,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1972759686] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:38,357 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:50:38,357 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 03:50:38,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868604097] [2021-06-05 03:50:38,358 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 03:50:38,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:50:38,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 03:50:38,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:50:38,358 INFO L87 Difference]: Start difference. First operand 6635 states and 17481 transitions. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:38,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:50:38,503 INFO L93 Difference]: Finished difference Result 7750 states and 19446 transitions. [2021-06-05 03:50:38,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 03:50:38,503 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 03:50:38,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:50:38,510 INFO L225 Difference]: With dead ends: 7750 [2021-06-05 03:50:38,510 INFO L226 Difference]: Without dead ends: 7723 [2021-06-05 03:50:38,510 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 80.1ms TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:50:38,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7723 states. [2021-06-05 03:50:38,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7723 to 6635. [2021-06-05 03:50:38,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6635 states, 6634 states have (on average 2.6341573711184805) internal successors, (17475), 6634 states have internal predecessors, (17475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:38,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6635 states to 6635 states and 17475 transitions. [2021-06-05 03:50:38,580 INFO L78 Accepts]: Start accepts. Automaton has 6635 states and 17475 transitions. Word has length 47 [2021-06-05 03:50:38,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:50:38,580 INFO L482 AbstractCegarLoop]: Abstraction has 6635 states and 17475 transitions. [2021-06-05 03:50:38,581 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:38,581 INFO L276 IsEmpty]: Start isEmpty. Operand 6635 states and 17475 transitions. [2021-06-05 03:50:38,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 03:50:38,584 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:50:38,585 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:50:38,785 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable403,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:50:38,785 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:50:38,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:50:38,785 INFO L82 PathProgramCache]: Analyzing trace with hash 890204437, now seen corresponding path program 50 times [2021-06-05 03:50:38,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:50:38,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674985195] [2021-06-05 03:50:38,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:50:38,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:50:38,850 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 87 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:50:38,851 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:50:38,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674985195] [2021-06-05 03:50:38,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674985195] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:38,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070944557] [2021-06-05 03:50:38,851 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:50:38,874 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:50:38,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:50:38,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 03:50:38,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:50:38,936 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 88 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:50:38,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070944557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:38,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:50:38,937 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 03:50:38,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523214775] [2021-06-05 03:50:38,937 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 03:50:38,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:50:38,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 03:50:38,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-05 03:50:38,937 INFO L87 Difference]: Start difference. First operand 6635 states and 17475 transitions. Second operand has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:39,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:50:39,250 INFO L93 Difference]: Finished difference Result 7795 states and 19769 transitions. [2021-06-05 03:50:39,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 03:50:39,250 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 03:50:39,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:50:39,257 INFO L225 Difference]: With dead ends: 7795 [2021-06-05 03:50:39,257 INFO L226 Difference]: Without dead ends: 7771 [2021-06-05 03:50:39,257 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 96.2ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:50:39,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7771 states. [2021-06-05 03:50:39,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7771 to 6763. [2021-06-05 03:50:39,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6763 states, 6762 states have (on average 2.6302868973676428) internal successors, (17786), 6762 states have internal predecessors, (17786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:39,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6763 states to 6763 states and 17786 transitions. [2021-06-05 03:50:39,331 INFO L78 Accepts]: Start accepts. Automaton has 6763 states and 17786 transitions. Word has length 47 [2021-06-05 03:50:39,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:50:39,331 INFO L482 AbstractCegarLoop]: Abstraction has 6763 states and 17786 transitions. [2021-06-05 03:50:39,332 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:39,332 INFO L276 IsEmpty]: Start isEmpty. Operand 6763 states and 17786 transitions. [2021-06-05 03:50:39,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 03:50:39,336 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:50:39,336 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:50:39,536 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable408 [2021-06-05 03:50:39,536 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:50:39,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:50:39,536 INFO L82 PathProgramCache]: Analyzing trace with hash -663492420, now seen corresponding path program 109 times [2021-06-05 03:50:39,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:50:39,536 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503209894] [2021-06-05 03:50:39,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:50:39,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:50:39,573 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 37 proven. 57 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 03:50:39,573 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:50:39,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503209894] [2021-06-05 03:50:39,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503209894] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:39,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582786384] [2021-06-05 03:50:39,573 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:50:39,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:50:39,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 03:50:39,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:50:39,655 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 37 proven. 57 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 03:50:39,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582786384] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:39,656 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:50:39,656 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-05 03:50:39,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003548300] [2021-06-05 03:50:39,656 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 03:50:39,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:50:39,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 03:50:39,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-05 03:50:39,656 INFO L87 Difference]: Start difference. First operand 6763 states and 17786 transitions. Second operand has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:39,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:50:39,782 INFO L93 Difference]: Finished difference Result 8122 states and 20221 transitions. [2021-06-05 03:50:39,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 03:50:39,782 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 03:50:39,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:50:39,789 INFO L225 Difference]: With dead ends: 8122 [2021-06-05 03:50:39,789 INFO L226 Difference]: Without dead ends: 8119 [2021-06-05 03:50:39,789 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 33.4ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-06-05 03:50:39,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8119 states. [2021-06-05 03:50:39,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8119 to 6755. [2021-06-05 03:50:39,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6755 states, 6754 states have (on average 2.628368374296713) internal successors, (17752), 6754 states have internal predecessors, (17752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:39,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6755 states to 6755 states and 17752 transitions. [2021-06-05 03:50:39,860 INFO L78 Accepts]: Start accepts. Automaton has 6755 states and 17752 transitions. Word has length 47 [2021-06-05 03:50:39,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:50:39,860 INFO L482 AbstractCegarLoop]: Abstraction has 6755 states and 17752 transitions. [2021-06-05 03:50:39,860 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:39,861 INFO L276 IsEmpty]: Start isEmpty. Operand 6755 states and 17752 transitions. [2021-06-05 03:50:39,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 03:50:39,865 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:50:39,865 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:50:40,065 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable409,210 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:50:40,065 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:50:40,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:50:40,065 INFO L82 PathProgramCache]: Analyzing trace with hash -456429854, now seen corresponding path program 110 times [2021-06-05 03:50:40,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:50:40,066 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084814475] [2021-06-05 03:50:40,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:50:40,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:50:40,111 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 32 proven. 62 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 03:50:40,111 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:50:40,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084814475] [2021-06-05 03:50:40,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084814475] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:40,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670618559] [2021-06-05 03:50:40,111 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:50:40,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:50:40,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:50:40,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 03:50:40,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:50:40,194 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 32 proven. 62 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 03:50:40,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670618559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:40,194 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:50:40,195 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 03:50:40,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008558874] [2021-06-05 03:50:40,195 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 03:50:40,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:50:40,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 03:50:40,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 03:50:40,195 INFO L87 Difference]: Start difference. First operand 6755 states and 17752 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:40,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:50:40,330 INFO L93 Difference]: Finished difference Result 8150 states and 20236 transitions. [2021-06-05 03:50:40,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 03:50:40,331 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 03:50:40,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:50:40,338 INFO L225 Difference]: With dead ends: 8150 [2021-06-05 03:50:40,338 INFO L226 Difference]: Without dead ends: 8132 [2021-06-05 03:50:40,339 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 56.9ms TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:50:40,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8132 states. [2021-06-05 03:50:40,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8132 to 6755. [2021-06-05 03:50:40,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6755 states, 6754 states have (on average 2.6254071661237783) internal successors, (17732), 6754 states have internal predecessors, (17732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:40,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6755 states to 6755 states and 17732 transitions. [2021-06-05 03:50:40,415 INFO L78 Accepts]: Start accepts. Automaton has 6755 states and 17732 transitions. Word has length 47 [2021-06-05 03:50:40,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:50:40,415 INFO L482 AbstractCegarLoop]: Abstraction has 6755 states and 17732 transitions. [2021-06-05 03:50:40,415 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:40,415 INFO L276 IsEmpty]: Start isEmpty. Operand 6755 states and 17732 transitions. [2021-06-05 03:50:40,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 03:50:40,419 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:50:40,419 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:50:40,619 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 211 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable411 [2021-06-05 03:50:40,619 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:50:40,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:50:40,620 INFO L82 PathProgramCache]: Analyzing trace with hash -1904429867, now seen corresponding path program 111 times [2021-06-05 03:50:40,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:50:40,620 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594369251] [2021-06-05 03:50:40,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:50:40,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:50:40,679 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 16 proven. 78 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:50:40,680 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:50:40,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594369251] [2021-06-05 03:50:40,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594369251] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:40,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812057014] [2021-06-05 03:50:40,680 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:50:40,706 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-06-05 03:50:40,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:50:40,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 03:50:40,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:50:40,780 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 11 proven. 83 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:50:40,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1812057014] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:40,780 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:50:40,780 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 03:50:40,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129669536] [2021-06-05 03:50:40,780 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 03:50:40,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:50:40,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 03:50:40,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-05 03:50:40,780 INFO L87 Difference]: Start difference. First operand 6755 states and 17732 transitions. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:41,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:50:41,203 INFO L93 Difference]: Finished difference Result 7412 states and 18888 transitions. [2021-06-05 03:50:41,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 03:50:41,203 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 03:50:41,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:50:41,210 INFO L225 Difference]: With dead ends: 7412 [2021-06-05 03:50:41,210 INFO L226 Difference]: Without dead ends: 7338 [2021-06-05 03:50:41,210 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 94.0ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:50:41,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7338 states. [2021-06-05 03:50:41,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7338 to 6729. [2021-06-05 03:50:41,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6729 states, 6728 states have (on average 2.6211355529131986) internal successors, (17635), 6728 states have internal predecessors, (17635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:41,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6729 states to 6729 states and 17635 transitions. [2021-06-05 03:50:41,281 INFO L78 Accepts]: Start accepts. Automaton has 6729 states and 17635 transitions. Word has length 47 [2021-06-05 03:50:41,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:50:41,281 INFO L482 AbstractCegarLoop]: Abstraction has 6729 states and 17635 transitions. [2021-06-05 03:50:41,281 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:41,281 INFO L276 IsEmpty]: Start isEmpty. Operand 6729 states and 17635 transitions. [2021-06-05 03:50:41,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 03:50:41,285 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:50:41,285 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:50:41,485 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable414 [2021-06-05 03:50:41,485 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:50:41,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:50:41,486 INFO L82 PathProgramCache]: Analyzing trace with hash 1777001249, now seen corresponding path program 112 times [2021-06-05 03:50:41,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:50:41,486 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268658480] [2021-06-05 03:50:41,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:50:41,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:50:41,550 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 79 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 03:50:41,550 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:50:41,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268658480] [2021-06-05 03:50:41,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268658480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:41,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303002389] [2021-06-05 03:50:41,550 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:50:41,574 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:50:41,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:50:41,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 03:50:41,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:50:41,635 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 80 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 03:50:41,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303002389] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:41,635 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:50:41,635 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 03:50:41,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832498137] [2021-06-05 03:50:41,635 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 03:50:41,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:50:41,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 03:50:41,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-05 03:50:41,635 INFO L87 Difference]: Start difference. First operand 6729 states and 17635 transitions. Second operand has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:41,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:50:41,922 INFO L93 Difference]: Finished difference Result 7761 states and 19651 transitions. [2021-06-05 03:50:41,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 03:50:41,922 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 03:50:41,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:50:41,929 INFO L225 Difference]: With dead ends: 7761 [2021-06-05 03:50:41,929 INFO L226 Difference]: Without dead ends: 7749 [2021-06-05 03:50:41,929 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 95.0ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:50:41,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7749 states. [2021-06-05 03:50:41,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7749 to 6765. [2021-06-05 03:50:41,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6765 states, 6764 states have (on average 2.6197516262566527) internal successors, (17720), 6764 states have internal predecessors, (17720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:42,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6765 states to 6765 states and 17720 transitions. [2021-06-05 03:50:42,000 INFO L78 Accepts]: Start accepts. Automaton has 6765 states and 17720 transitions. Word has length 47 [2021-06-05 03:50:42,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:50:42,000 INFO L482 AbstractCegarLoop]: Abstraction has 6765 states and 17720 transitions. [2021-06-05 03:50:42,000 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:42,000 INFO L276 IsEmpty]: Start isEmpty. Operand 6765 states and 17720 transitions. [2021-06-05 03:50:42,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 03:50:42,004 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:50:42,004 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:50:42,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable415,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:50:42,204 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:50:42,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:50:42,205 INFO L82 PathProgramCache]: Analyzing trace with hash -376048713, now seen corresponding path program 113 times [2021-06-05 03:50:42,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:50:42,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368550203] [2021-06-05 03:50:42,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:50:42,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:50:42,266 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 81 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:50:42,266 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:50:42,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368550203] [2021-06-05 03:50:42,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368550203] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:42,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130129323] [2021-06-05 03:50:42,267 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:50:42,294 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-06-05 03:50:42,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:50:42,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 03:50:42,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:50:42,356 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 82 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:50:42,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130129323] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:42,356 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:50:42,357 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 03:50:42,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44328996] [2021-06-05 03:50:42,357 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 03:50:42,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:50:42,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 03:50:42,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-05 03:50:42,357 INFO L87 Difference]: Start difference. First operand 6765 states and 17720 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:42,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:50:42,801 INFO L93 Difference]: Finished difference Result 8961 states and 22249 transitions. [2021-06-05 03:50:42,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 03:50:42,801 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 03:50:42,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:50:42,809 INFO L225 Difference]: With dead ends: 8961 [2021-06-05 03:50:42,809 INFO L226 Difference]: Without dead ends: 8907 [2021-06-05 03:50:42,809 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 147.6ms TimeCoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-06-05 03:50:42,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8907 states. [2021-06-05 03:50:42,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8907 to 6885. [2021-06-05 03:50:42,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6885 states, 6884 states have (on average 2.6198431144683325) internal successors, (18035), 6884 states have internal predecessors, (18035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:42,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6885 states to 6885 states and 18035 transitions. [2021-06-05 03:50:42,886 INFO L78 Accepts]: Start accepts. Automaton has 6885 states and 18035 transitions. Word has length 47 [2021-06-05 03:50:42,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:50:42,887 INFO L482 AbstractCegarLoop]: Abstraction has 6885 states and 18035 transitions. [2021-06-05 03:50:42,887 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:42,887 INFO L276 IsEmpty]: Start isEmpty. Operand 6885 states and 18035 transitions. [2021-06-05 03:50:42,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 03:50:42,891 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:50:42,891 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:50:43,091 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable416,214 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:50:43,091 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:50:43,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:50:43,091 INFO L82 PathProgramCache]: Analyzing trace with hash 1156510396, now seen corresponding path program 114 times [2021-06-05 03:50:43,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:50:43,091 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626881947] [2021-06-05 03:50:43,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:50:43,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:50:43,147 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 27 proven. 70 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:50:43,147 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:50:43,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626881947] [2021-06-05 03:50:43,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626881947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:43,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231350913] [2021-06-05 03:50:43,147 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:50:43,172 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-05 03:50:43,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:50:43,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 03:50:43,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:50:43,233 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 27 proven. 70 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:50:43,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231350913] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:43,233 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:50:43,233 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 03:50:43,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327392925] [2021-06-05 03:50:43,233 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 03:50:43,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:50:43,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 03:50:43,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-06-05 03:50:43,233 INFO L87 Difference]: Start difference. First operand 6885 states and 18035 transitions. Second operand has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:43,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:50:43,392 INFO L93 Difference]: Finished difference Result 8306 states and 20557 transitions. [2021-06-05 03:50:43,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 03:50:43,393 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 03:50:43,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:50:43,400 INFO L225 Difference]: With dead ends: 8306 [2021-06-05 03:50:43,400 INFO L226 Difference]: Without dead ends: 8282 [2021-06-05 03:50:43,400 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 64.2ms TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:50:43,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8282 states. [2021-06-05 03:50:43,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8282 to 6885. [2021-06-05 03:50:43,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6885 states, 6884 states have (on average 2.6178094131319) internal successors, (18021), 6884 states have internal predecessors, (18021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:43,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6885 states to 6885 states and 18021 transitions. [2021-06-05 03:50:43,479 INFO L78 Accepts]: Start accepts. Automaton has 6885 states and 18021 transitions. Word has length 47 [2021-06-05 03:50:43,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:50:43,480 INFO L482 AbstractCegarLoop]: Abstraction has 6885 states and 18021 transitions. [2021-06-05 03:50:43,480 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:43,480 INFO L276 IsEmpty]: Start isEmpty. Operand 6885 states and 18021 transitions. [2021-06-05 03:50:43,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 03:50:43,484 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:50:43,484 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:50:43,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable417,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:50:43,684 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:50:43,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:50:43,685 INFO L82 PathProgramCache]: Analyzing trace with hash -221212179, now seen corresponding path program 115 times [2021-06-05 03:50:43,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:50:43,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711265412] [2021-06-05 03:50:43,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:50:43,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:50:43,763 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 81 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:50:43,764 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:50:43,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711265412] [2021-06-05 03:50:43,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711265412] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:43,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031167125] [2021-06-05 03:50:43,764 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:50:43,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:50:43,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 03:50:43,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:50:43,849 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 82 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:50:43,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031167125] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:43,849 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:50:43,849 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 03:50:43,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494671310] [2021-06-05 03:50:43,849 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 03:50:43,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:50:43,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 03:50:43,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:50:43,849 INFO L87 Difference]: Start difference. First operand 6885 states and 18021 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:44,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:50:44,414 INFO L93 Difference]: Finished difference Result 10707 states and 26088 transitions. [2021-06-05 03:50:44,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 03:50:44,415 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 03:50:44,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:50:44,425 INFO L225 Difference]: With dead ends: 10707 [2021-06-05 03:50:44,425 INFO L226 Difference]: Without dead ends: 10593 [2021-06-05 03:50:44,425 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 256.6ms TimeCoverageRelationStatistics Valid=171, Invalid=1019, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 03:50:44,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10593 states. [2021-06-05 03:50:44,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10593 to 7009. [2021-06-05 03:50:44,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7009 states, 7008 states have (on average 2.617865296803653) internal successors, (18346), 7008 states have internal predecessors, (18346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:44,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7009 states to 7009 states and 18346 transitions. [2021-06-05 03:50:44,517 INFO L78 Accepts]: Start accepts. Automaton has 7009 states and 18346 transitions. Word has length 47 [2021-06-05 03:50:44,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:50:44,517 INFO L482 AbstractCegarLoop]: Abstraction has 7009 states and 18346 transitions. [2021-06-05 03:50:44,517 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:44,517 INFO L276 IsEmpty]: Start isEmpty. Operand 7009 states and 18346 transitions. [2021-06-05 03:50:44,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 03:50:44,522 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:50:44,522 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:50:44,722 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable421 [2021-06-05 03:50:44,722 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:50:44,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:50:44,722 INFO L82 PathProgramCache]: Analyzing trace with hash 165390498, now seen corresponding path program 116 times [2021-06-05 03:50:44,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:50:44,722 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883599769] [2021-06-05 03:50:44,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:50:44,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:50:44,786 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 28 proven. 69 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:50:44,786 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:50:44,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883599769] [2021-06-05 03:50:44,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883599769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:44,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537721360] [2021-06-05 03:50:44,786 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:50:44,809 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:50:44,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:50:44,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 03:50:44,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:50:44,873 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 28 proven. 69 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:50:44,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537721360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:44,873 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:50:44,874 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 03:50:44,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468062974] [2021-06-05 03:50:44,874 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 03:50:44,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:50:44,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 03:50:44,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:50:44,874 INFO L87 Difference]: Start difference. First operand 7009 states and 18346 transitions. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:45,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:50:45,084 INFO L93 Difference]: Finished difference Result 8467 states and 20934 transitions. [2021-06-05 03:50:45,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 03:50:45,084 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 03:50:45,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:50:45,092 INFO L225 Difference]: With dead ends: 8467 [2021-06-05 03:50:45,092 INFO L226 Difference]: Without dead ends: 8434 [2021-06-05 03:50:45,092 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 80.3ms TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:50:45,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8434 states. [2021-06-05 03:50:45,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8434 to 6781. [2021-06-05 03:50:45,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6781 states, 6780 states have (on average 2.6073746312684367) internal successors, (17678), 6780 states have internal predecessors, (17678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:45,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6781 states to 6781 states and 17678 transitions. [2021-06-05 03:50:45,181 INFO L78 Accepts]: Start accepts. Automaton has 6781 states and 17678 transitions. Word has length 47 [2021-06-05 03:50:45,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:50:45,181 INFO L482 AbstractCegarLoop]: Abstraction has 6781 states and 17678 transitions. [2021-06-05 03:50:45,181 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:45,181 INFO L276 IsEmpty]: Start isEmpty. Operand 6781 states and 17678 transitions. [2021-06-05 03:50:45,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 03:50:45,185 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:50:45,185 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:50:45,385 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable422 [2021-06-05 03:50:45,386 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:50:45,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:50:45,386 INFO L82 PathProgramCache]: Analyzing trace with hash -280903689, now seen corresponding path program 117 times [2021-06-05 03:50:45,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:50:45,386 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408845122] [2021-06-05 03:50:45,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:50:45,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:50:45,464 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:50:45,464 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:50:45,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408845122] [2021-06-05 03:50:45,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408845122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:45,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305435478] [2021-06-05 03:50:45,464 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:50:45,492 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-06-05 03:50:45,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:50:45,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 03:50:45,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:50:45,559 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:50:45,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305435478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:45,559 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:50:45,559 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 03:50:45,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892203183] [2021-06-05 03:50:45,559 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 03:50:45,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:50:45,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 03:50:45,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:50:45,560 INFO L87 Difference]: Start difference. First operand 6781 states and 17678 transitions. Second operand has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:45,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:50:45,992 INFO L93 Difference]: Finished difference Result 9528 states and 23213 transitions. [2021-06-05 03:50:45,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 03:50:45,992 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 03:50:45,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:50:46,001 INFO L225 Difference]: With dead ends: 9528 [2021-06-05 03:50:46,001 INFO L226 Difference]: Without dead ends: 9372 [2021-06-05 03:50:46,001 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 180.3ms TimeCoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2021-06-05 03:50:46,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9372 states. [2021-06-05 03:50:46,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9372 to 6516. [2021-06-05 03:50:46,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6516 states, 6515 states have (on average 2.6015349194167308) internal successors, (16949), 6515 states have internal predecessors, (16949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:46,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6516 states to 6516 states and 16949 transitions. [2021-06-05 03:50:46,081 INFO L78 Accepts]: Start accepts. Automaton has 6516 states and 16949 transitions. Word has length 47 [2021-06-05 03:50:46,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:50:46,081 INFO L482 AbstractCegarLoop]: Abstraction has 6516 states and 16949 transitions. [2021-06-05 03:50:46,081 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:46,081 INFO L276 IsEmpty]: Start isEmpty. Operand 6516 states and 16949 transitions. [2021-06-05 03:50:46,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 03:50:46,085 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:50:46,085 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:50:46,285 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable427,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:50:46,286 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:50:46,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:50:46,286 INFO L82 PathProgramCache]: Analyzing trace with hash -518965206, now seen corresponding path program 51 times [2021-06-05 03:50:46,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:50:46,286 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561718116] [2021-06-05 03:50:46,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:50:46,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:50:46,332 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 77 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:50:46,333 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:50:46,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561718116] [2021-06-05 03:50:46,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561718116] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:46,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933547095] [2021-06-05 03:50:46,333 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:50:46,359 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-06-05 03:50:46,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:50:46,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 03:50:46,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:50:46,424 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 78 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:50:46,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933547095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:46,425 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:50:46,425 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 10 [2021-06-05 03:50:46,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266032880] [2021-06-05 03:50:46,425 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 03:50:46,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:50:46,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 03:50:46,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-06-05 03:50:46,425 INFO L87 Difference]: Start difference. First operand 6516 states and 16949 transitions. Second operand has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:46,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:50:46,580 INFO L93 Difference]: Finished difference Result 8372 states and 20874 transitions. [2021-06-05 03:50:46,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 03:50:46,581 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 03:50:46,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:50:46,588 INFO L225 Difference]: With dead ends: 8372 [2021-06-05 03:50:46,588 INFO L226 Difference]: Without dead ends: 8356 [2021-06-05 03:50:46,588 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 53.9ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:50:46,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8356 states. [2021-06-05 03:50:46,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8356 to 6760. [2021-06-05 03:50:46,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6760 states, 6759 states have (on average 2.6057109039798787) internal successors, (17612), 6759 states have internal predecessors, (17612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:46,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6760 states to 6760 states and 17612 transitions. [2021-06-05 03:50:46,667 INFO L78 Accepts]: Start accepts. Automaton has 6760 states and 17612 transitions. Word has length 47 [2021-06-05 03:50:46,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:50:46,667 INFO L482 AbstractCegarLoop]: Abstraction has 6760 states and 17612 transitions. [2021-06-05 03:50:46,667 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:46,667 INFO L276 IsEmpty]: Start isEmpty. Operand 6760 states and 17612 transitions. [2021-06-05 03:50:46,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 03:50:46,671 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:50:46,671 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:50:46,871 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable428 [2021-06-05 03:50:46,872 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:50:46,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:50:46,872 INFO L82 PathProgramCache]: Analyzing trace with hash -1140845616, now seen corresponding path program 52 times [2021-06-05 03:50:46,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:50:46,872 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601919919] [2021-06-05 03:50:46,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:50:46,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:50:46,922 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 77 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:50:46,922 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:50:46,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601919919] [2021-06-05 03:50:46,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601919919] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:46,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116786682] [2021-06-05 03:50:46,922 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:50:46,945 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:50:46,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:50:46,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 03:50:46,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:50:47,014 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 78 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:50:47,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116786682] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:47,014 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:50:47,014 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 10 [2021-06-05 03:50:47,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294122918] [2021-06-05 03:50:47,014 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 03:50:47,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:50:47,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 03:50:47,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-06-05 03:50:47,014 INFO L87 Difference]: Start difference. First operand 6760 states and 17612 transitions. Second operand has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:47,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:50:47,195 INFO L93 Difference]: Finished difference Result 10200 states and 25050 transitions. [2021-06-05 03:50:47,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 03:50:47,195 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 03:50:47,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:50:47,206 INFO L225 Difference]: With dead ends: 10200 [2021-06-05 03:50:47,206 INFO L226 Difference]: Without dead ends: 10200 [2021-06-05 03:50:47,206 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 71.2ms TimeCoverageRelationStatistics Valid=89, Invalid=121, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:50:47,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10200 states. [2021-06-05 03:50:47,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10200 to 6771. [2021-06-05 03:50:47,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6771 states, 6770 states have (on average 2.606351550960118) internal successors, (17645), 6770 states have internal predecessors, (17645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:47,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6771 states to 6771 states and 17645 transitions. [2021-06-05 03:50:47,297 INFO L78 Accepts]: Start accepts. Automaton has 6771 states and 17645 transitions. Word has length 47 [2021-06-05 03:50:47,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:50:47,298 INFO L482 AbstractCegarLoop]: Abstraction has 6771 states and 17645 transitions. [2021-06-05 03:50:47,298 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:47,298 INFO L276 IsEmpty]: Start isEmpty. Operand 6771 states and 17645 transitions. [2021-06-05 03:50:47,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 03:50:47,302 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:50:47,302 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:50:47,502 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable430 [2021-06-05 03:50:47,502 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:50:47,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:50:47,502 INFO L82 PathProgramCache]: Analyzing trace with hash 1516549224, now seen corresponding path program 53 times [2021-06-05 03:50:47,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:50:47,502 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687277265] [2021-06-05 03:50:47,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:50:47,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:50:47,557 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 76 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:50:47,557 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:50:47,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687277265] [2021-06-05 03:50:47,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687277265] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:47,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256727611] [2021-06-05 03:50:47,557 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:50:47,583 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-06-05 03:50:47,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:50:47,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 03:50:47,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:50:47,717 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 78 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:50:47,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256727611] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:47,717 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:50:47,717 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 16] total 19 [2021-06-05 03:50:47,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055296032] [2021-06-05 03:50:47,718 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 03:50:47,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:50:47,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 03:50:47,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=254, Unknown=0, NotChecked=0, Total=380 [2021-06-05 03:50:47,718 INFO L87 Difference]: Start difference. First operand 6771 states and 17645 transitions. Second operand has 20 states, 20 states have (on average 3.45) internal successors, (69), 19 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:48,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:50:48,143 INFO L93 Difference]: Finished difference Result 11339 states and 27631 transitions. [2021-06-05 03:50:48,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 03:50:48,143 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.45) internal successors, (69), 19 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 03:50:48,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:50:48,154 INFO L225 Difference]: With dead ends: 11339 [2021-06-05 03:50:48,154 INFO L226 Difference]: Without dead ends: 11339 [2021-06-05 03:50:48,154 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 281.4ms TimeCoverageRelationStatistics Valid=369, Invalid=623, Unknown=0, NotChecked=0, Total=992 [2021-06-05 03:50:48,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11339 states. [2021-06-05 03:50:48,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11339 to 6800. [2021-06-05 03:50:48,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6800 states, 6799 states have (on average 2.6087659949992648) internal successors, (17737), 6799 states have internal predecessors, (17737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:48,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6800 states to 6800 states and 17737 transitions. [2021-06-05 03:50:48,249 INFO L78 Accepts]: Start accepts. Automaton has 6800 states and 17737 transitions. Word has length 47 [2021-06-05 03:50:48,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:50:48,249 INFO L482 AbstractCegarLoop]: Abstraction has 6800 states and 17737 transitions. [2021-06-05 03:50:48,249 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.45) internal successors, (69), 19 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:48,249 INFO L276 IsEmpty]: Start isEmpty. Operand 6800 states and 17737 transitions. [2021-06-05 03:50:48,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 03:50:48,253 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:50:48,254 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:50:48,454 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable431,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:50:48,454 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:50:48,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:50:48,454 INFO L82 PathProgramCache]: Analyzing trace with hash -173445940, now seen corresponding path program 54 times [2021-06-05 03:50:48,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:50:48,454 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090525690] [2021-06-05 03:50:48,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:50:48,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:50:48,518 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 69 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:50:48,518 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:50:48,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090525690] [2021-06-05 03:50:48,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090525690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:48,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221755138] [2021-06-05 03:50:48,518 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:50:48,544 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-06-05 03:50:48,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:50:48,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 03:50:48,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:50:48,611 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 70 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:50:48,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221755138] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:48,611 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:50:48,611 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 12 [2021-06-05 03:50:48,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932441890] [2021-06-05 03:50:48,611 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 03:50:48,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:50:48,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 03:50:48,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:50:48,612 INFO L87 Difference]: Start difference. First operand 6800 states and 17737 transitions. Second operand has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:48,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:50:48,865 INFO L93 Difference]: Finished difference Result 10003 states and 24584 transitions. [2021-06-05 03:50:48,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 03:50:48,865 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 03:50:48,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:50:48,875 INFO L225 Difference]: With dead ends: 10003 [2021-06-05 03:50:48,875 INFO L226 Difference]: Without dead ends: 10003 [2021-06-05 03:50:48,875 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 119.9ms TimeCoverageRelationStatistics Valid=163, Invalid=257, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:50:48,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10003 states. [2021-06-05 03:50:48,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10003 to 6809. [2021-06-05 03:50:48,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6809 states, 6808 states have (on average 2.608548766157462) internal successors, (17759), 6808 states have internal predecessors, (17759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:48,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6809 states to 6809 states and 17759 transitions. [2021-06-05 03:50:48,963 INFO L78 Accepts]: Start accepts. Automaton has 6809 states and 17759 transitions. Word has length 47 [2021-06-05 03:50:48,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:50:48,963 INFO L482 AbstractCegarLoop]: Abstraction has 6809 states and 17759 transitions. [2021-06-05 03:50:48,963 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:48,963 INFO L276 IsEmpty]: Start isEmpty. Operand 6809 states and 17759 transitions. [2021-06-05 03:50:48,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 03:50:48,967 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:50:48,967 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:50:49,168 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable432 [2021-06-05 03:50:49,168 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:50:49,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:50:49,168 INFO L82 PathProgramCache]: Analyzing trace with hash -1212732952, now seen corresponding path program 55 times [2021-06-05 03:50:49,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:50:49,168 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903529000] [2021-06-05 03:50:49,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:50:49,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:50:49,245 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 62 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:50:49,245 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:50:49,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903529000] [2021-06-05 03:50:49,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903529000] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:49,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615946864] [2021-06-05 03:50:49,245 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:50:49,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:50:49,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 03:50:49,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:50:49,340 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 63 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:50:49,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615946864] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:49,341 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:50:49,341 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2021-06-05 03:50:49,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307488268] [2021-06-05 03:50:49,341 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:50:49,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:50:49,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:50:49,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:50:49,341 INFO L87 Difference]: Start difference. First operand 6809 states and 17759 transitions. Second operand has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:49,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:50:49,608 INFO L93 Difference]: Finished difference Result 8634 states and 21474 transitions. [2021-06-05 03:50:49,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 03:50:49,608 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 03:50:49,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:50:49,616 INFO L225 Difference]: With dead ends: 8634 [2021-06-05 03:50:49,616 INFO L226 Difference]: Without dead ends: 8634 [2021-06-05 03:50:49,616 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 133.3ms TimeCoverageRelationStatistics Valid=155, Invalid=265, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:50:49,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8634 states. [2021-06-05 03:50:49,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8634 to 6442. [2021-06-05 03:50:49,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6442 states, 6441 states have (on average 2.6028566992702995) internal successors, (16765), 6441 states have internal predecessors, (16765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:49,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6442 states to 6442 states and 16765 transitions. [2021-06-05 03:50:49,690 INFO L78 Accepts]: Start accepts. Automaton has 6442 states and 16765 transitions. Word has length 47 [2021-06-05 03:50:49,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:50:49,690 INFO L482 AbstractCegarLoop]: Abstraction has 6442 states and 16765 transitions. [2021-06-05 03:50:49,690 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:49,690 INFO L276 IsEmpty]: Start isEmpty. Operand 6442 states and 16765 transitions. [2021-06-05 03:50:49,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 03:50:49,694 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:50:49,694 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:50:49,894 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 223 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable433 [2021-06-05 03:50:49,894 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:50:49,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:50:49,894 INFO L82 PathProgramCache]: Analyzing trace with hash 1612669180, now seen corresponding path program 118 times [2021-06-05 03:50:49,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:50:49,895 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685691017] [2021-06-05 03:50:49,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:50:49,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:50:49,964 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:50:49,965 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:50:49,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685691017] [2021-06-05 03:50:49,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685691017] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:49,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538719147] [2021-06-05 03:50:49,965 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:50:49,989 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:50:49,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:50:49,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 03:50:49,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:50:50,053 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:50:50,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538719147] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:50,053 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:50:50,053 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-06-05 03:50:50,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717773609] [2021-06-05 03:50:50,054 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 03:50:50,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:50:50,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 03:50:50,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:50:50,054 INFO L87 Difference]: Start difference. First operand 6442 states and 16765 transitions. Second operand has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:50,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:50:50,243 INFO L93 Difference]: Finished difference Result 7636 states and 18887 transitions. [2021-06-05 03:50:50,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 03:50:50,243 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 03:50:50,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:50:50,249 INFO L225 Difference]: With dead ends: 7636 [2021-06-05 03:50:50,249 INFO L226 Difference]: Without dead ends: 7600 [2021-06-05 03:50:50,249 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 97.5ms TimeCoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2021-06-05 03:50:50,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7600 states. [2021-06-05 03:50:50,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7600 to 6442. [2021-06-05 03:50:50,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6442 states, 6441 states have (on average 2.60192516689955) internal successors, (16759), 6441 states have internal predecessors, (16759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:50,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6442 states to 6442 states and 16759 transitions. [2021-06-05 03:50:50,335 INFO L78 Accepts]: Start accepts. Automaton has 6442 states and 16759 transitions. Word has length 47 [2021-06-05 03:50:50,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:50:50,335 INFO L482 AbstractCegarLoop]: Abstraction has 6442 states and 16759 transitions. [2021-06-05 03:50:50,335 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:50,335 INFO L276 IsEmpty]: Start isEmpty. Operand 6442 states and 16759 transitions. [2021-06-05 03:50:50,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 03:50:50,338 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:50:50,339 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:50:50,539 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable434 [2021-06-05 03:50:50,539 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:50:50,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:50:50,539 INFO L82 PathProgramCache]: Analyzing trace with hash -2022814789, now seen corresponding path program 56 times [2021-06-05 03:50:50,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:50:50,539 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813075216] [2021-06-05 03:50:50,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:50:50,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:50:50,602 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 87 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:50:50,603 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:50:50,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813075216] [2021-06-05 03:50:50,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813075216] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:50,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175989167] [2021-06-05 03:50:50,603 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:50:50,627 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:50:50,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:50:50,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 03:50:50,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:50:50,688 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 88 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:50:50,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175989167] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:50,689 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:50:50,689 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 03:50:50,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246396749] [2021-06-05 03:50:50,689 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 03:50:50,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:50:50,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 03:50:50,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-05 03:50:50,689 INFO L87 Difference]: Start difference. First operand 6442 states and 16759 transitions. Second operand has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:51,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:50:51,004 INFO L93 Difference]: Finished difference Result 7550 states and 18942 transitions. [2021-06-05 03:50:51,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 03:50:51,004 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 03:50:51,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:50:51,011 INFO L225 Difference]: With dead ends: 7550 [2021-06-05 03:50:51,011 INFO L226 Difference]: Without dead ends: 7535 [2021-06-05 03:50:51,011 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 93.6ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:50:51,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7535 states. [2021-06-05 03:50:51,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7535 to 6598. [2021-06-05 03:50:51,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6598 states, 6597 states have (on average 2.5970895861755343) internal successors, (17133), 6597 states have internal predecessors, (17133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:51,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6598 states to 6598 states and 17133 transitions. [2021-06-05 03:50:51,081 INFO L78 Accepts]: Start accepts. Automaton has 6598 states and 17133 transitions. Word has length 47 [2021-06-05 03:50:51,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:50:51,081 INFO L482 AbstractCegarLoop]: Abstraction has 6598 states and 17133 transitions. [2021-06-05 03:50:51,082 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:51,082 INFO L276 IsEmpty]: Start isEmpty. Operand 6598 states and 17133 transitions. [2021-06-05 03:50:51,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 03:50:51,085 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:50:51,085 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:50:51,286 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable440,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:50:51,286 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:50:51,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:50:51,286 INFO L82 PathProgramCache]: Analyzing trace with hash -522481797, now seen corresponding path program 119 times [2021-06-05 03:50:51,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:50:51,286 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155345633] [2021-06-05 03:50:51,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:50:51,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:50:51,346 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 16 proven. 78 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:50:51,346 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:50:51,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155345633] [2021-06-05 03:50:51,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155345633] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:51,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302167204] [2021-06-05 03:50:51,346 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:50:51,373 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-06-05 03:50:51,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:50:51,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 03:50:51,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:50:51,448 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 11 proven. 83 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:50:51,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302167204] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:51,448 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:50:51,448 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 03:50:51,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404995808] [2021-06-05 03:50:51,448 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 03:50:51,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:50:51,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 03:50:51,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-05 03:50:51,448 INFO L87 Difference]: Start difference. First operand 6598 states and 17133 transitions. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:51,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:50:51,831 INFO L93 Difference]: Finished difference Result 7269 states and 18302 transitions. [2021-06-05 03:50:51,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 03:50:51,831 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 03:50:51,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:50:51,838 INFO L225 Difference]: With dead ends: 7269 [2021-06-05 03:50:51,838 INFO L226 Difference]: Without dead ends: 7177 [2021-06-05 03:50:51,838 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 93.5ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:50:51,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7177 states. [2021-06-05 03:50:51,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7177 to 6587. [2021-06-05 03:50:51,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6587 states, 6586 states have (on average 2.5889766170665047) internal successors, (17051), 6586 states have internal predecessors, (17051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:51,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6587 states to 6587 states and 17051 transitions. [2021-06-05 03:50:51,909 INFO L78 Accepts]: Start accepts. Automaton has 6587 states and 17051 transitions. Word has length 47 [2021-06-05 03:50:51,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:50:51,909 INFO L482 AbstractCegarLoop]: Abstraction has 6587 states and 17051 transitions. [2021-06-05 03:50:51,910 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:51,910 INFO L276 IsEmpty]: Start isEmpty. Operand 6587 states and 17051 transitions. [2021-06-05 03:50:51,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 03:50:51,914 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:50:51,914 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:50:52,114 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable441 [2021-06-05 03:50:52,114 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:50:52,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:50:52,114 INFO L82 PathProgramCache]: Analyzing trace with hash -1136017977, now seen corresponding path program 120 times [2021-06-05 03:50:52,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:50:52,115 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444440191] [2021-06-05 03:50:52,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:50:52,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:50:52,178 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 79 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 03:50:52,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:50:52,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444440191] [2021-06-05 03:50:52,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444440191] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:52,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978235990] [2021-06-05 03:50:52,178 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:50:52,205 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-06-05 03:50:52,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:50:52,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 03:50:52,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:50:52,266 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 80 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 03:50:52,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978235990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:52,266 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:50:52,266 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 03:50:52,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466891210] [2021-06-05 03:50:52,266 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 03:50:52,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:50:52,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 03:50:52,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-05 03:50:52,266 INFO L87 Difference]: Start difference. First operand 6587 states and 17051 transitions. Second operand has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:52,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:50:52,572 INFO L93 Difference]: Finished difference Result 7638 states and 19101 transitions. [2021-06-05 03:50:52,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 03:50:52,572 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 03:50:52,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:50:52,579 INFO L225 Difference]: With dead ends: 7638 [2021-06-05 03:50:52,579 INFO L226 Difference]: Without dead ends: 7626 [2021-06-05 03:50:52,579 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 94.4ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:50:52,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7626 states. [2021-06-05 03:50:52,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7626 to 6635. [2021-06-05 03:50:52,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6635 states, 6634 states have (on average 2.588182092252035) internal successors, (17170), 6634 states have internal predecessors, (17170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:52,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6635 states to 6635 states and 17170 transitions. [2021-06-05 03:50:52,661 INFO L78 Accepts]: Start accepts. Automaton has 6635 states and 17170 transitions. Word has length 47 [2021-06-05 03:50:52,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:50:52,661 INFO L482 AbstractCegarLoop]: Abstraction has 6635 states and 17170 transitions. [2021-06-05 03:50:52,661 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:52,661 INFO L276 IsEmpty]: Start isEmpty. Operand 6635 states and 17170 transitions. [2021-06-05 03:50:52,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 03:50:52,665 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:50:52,665 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:50:52,865 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable442 [2021-06-05 03:50:52,865 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:50:52,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:50:52,866 INFO L82 PathProgramCache]: Analyzing trace with hash -1293317464, now seen corresponding path program 57 times [2021-06-05 03:50:52,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:50:52,866 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343231194] [2021-06-05 03:50:52,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:50:52,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:50:52,914 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 60 proven. 37 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:50:52,914 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:50:52,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343231194] [2021-06-05 03:50:52,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343231194] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:52,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834189471] [2021-06-05 03:50:52,914 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:50:52,942 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-06-05 03:50:52,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:50:52,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 03:50:52,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:50:53,004 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 62 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:50:53,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834189471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:53,004 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:50:53,004 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 10 [2021-06-05 03:50:53,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545377599] [2021-06-05 03:50:53,004 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 03:50:53,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:50:53,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 03:50:53,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-05 03:50:53,005 INFO L87 Difference]: Start difference. First operand 6635 states and 17170 transitions. Second operand has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:53,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:50:53,194 INFO L93 Difference]: Finished difference Result 7955 states and 19893 transitions. [2021-06-05 03:50:53,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 03:50:53,194 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 03:50:53,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:50:53,201 INFO L225 Difference]: With dead ends: 7955 [2021-06-05 03:50:53,201 INFO L226 Difference]: Without dead ends: 7935 [2021-06-05 03:50:53,201 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 63.1ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:50:53,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7935 states. [2021-06-05 03:50:53,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7935 to 6729. [2021-06-05 03:50:53,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6729 states, 6728 states have (on average 2.581004756242568) internal successors, (17365), 6728 states have internal predecessors, (17365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:53,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6729 states to 6729 states and 17365 transitions. [2021-06-05 03:50:53,268 INFO L78 Accepts]: Start accepts. Automaton has 6729 states and 17365 transitions. Word has length 47 [2021-06-05 03:50:53,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:50:53,268 INFO L482 AbstractCegarLoop]: Abstraction has 6729 states and 17365 transitions. [2021-06-05 03:50:53,268 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:53,269 INFO L276 IsEmpty]: Start isEmpty. Operand 6729 states and 17365 transitions. [2021-06-05 03:50:53,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 03:50:53,273 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:50:53,273 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:50:53,473 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 228 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable443 [2021-06-05 03:50:53,473 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:50:53,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:50:53,473 INFO L82 PathProgramCache]: Analyzing trace with hash 1510591816, now seen corresponding path program 121 times [2021-06-05 03:50:53,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:50:53,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281519961] [2021-06-05 03:50:53,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:50:53,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:50:53,519 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 31 proven. 65 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:50:53,520 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:50:53,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281519961] [2021-06-05 03:50:53,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281519961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:53,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255945131] [2021-06-05 03:50:53,520 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:50:53,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:50:53,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 03:50:53,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:50:53,601 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 31 proven. 65 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:50:53,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255945131] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:53,602 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:50:53,602 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 03:50:53,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684850442] [2021-06-05 03:50:53,602 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 03:50:53,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:50:53,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 03:50:53,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 03:50:53,602 INFO L87 Difference]: Start difference. First operand 6729 states and 17365 transitions. Second operand has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:53,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:50:53,727 INFO L93 Difference]: Finished difference Result 8206 states and 20010 transitions. [2021-06-05 03:50:53,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 03:50:53,727 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 03:50:53,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:50:53,734 INFO L225 Difference]: With dead ends: 8206 [2021-06-05 03:50:53,734 INFO L226 Difference]: Without dead ends: 8188 [2021-06-05 03:50:53,735 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 56.3ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:50:53,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8188 states. [2021-06-05 03:50:53,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8188 to 6724. [2021-06-05 03:50:53,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6724 states, 6723 states have (on average 2.5790569686152014) internal successors, (17339), 6723 states have internal predecessors, (17339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:53,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6724 states to 6724 states and 17339 transitions. [2021-06-05 03:50:53,807 INFO L78 Accepts]: Start accepts. Automaton has 6724 states and 17339 transitions. Word has length 47 [2021-06-05 03:50:53,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:50:53,807 INFO L482 AbstractCegarLoop]: Abstraction has 6724 states and 17339 transitions. [2021-06-05 03:50:53,807 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:53,807 INFO L276 IsEmpty]: Start isEmpty. Operand 6724 states and 17339 transitions. [2021-06-05 03:50:53,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 03:50:53,811 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:50:53,811 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:50:54,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable446 [2021-06-05 03:50:54,017 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:50:54,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:50:54,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1005899357, now seen corresponding path program 122 times [2021-06-05 03:50:54,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:50:54,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349436630] [2021-06-05 03:50:54,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:50:54,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:50:54,079 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 81 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:50:54,079 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:50:54,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349436630] [2021-06-05 03:50:54,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349436630] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:54,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002192907] [2021-06-05 03:50:54,079 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:50:54,104 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:50:54,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:50:54,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 03:50:54,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:50:54,166 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 82 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:50:54,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2002192907] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:54,166 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:50:54,166 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 03:50:54,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305391461] [2021-06-05 03:50:54,166 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 03:50:54,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:50:54,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 03:50:54,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-05 03:50:54,167 INFO L87 Difference]: Start difference. First operand 6724 states and 17339 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:54,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:50:54,599 INFO L93 Difference]: Finished difference Result 8839 states and 21652 transitions. [2021-06-05 03:50:54,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 03:50:54,599 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 03:50:54,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:50:54,608 INFO L225 Difference]: With dead ends: 8839 [2021-06-05 03:50:54,608 INFO L226 Difference]: Without dead ends: 8785 [2021-06-05 03:50:54,609 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 164.1ms TimeCoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2021-06-05 03:50:54,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8785 states. [2021-06-05 03:50:54,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8785 to 6842. [2021-06-05 03:50:54,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6842 states, 6841 states have (on average 2.579447449203333) internal successors, (17646), 6841 states have internal predecessors, (17646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:54,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6842 states to 6842 states and 17646 transitions. [2021-06-05 03:50:54,687 INFO L78 Accepts]: Start accepts. Automaton has 6842 states and 17646 transitions. Word has length 47 [2021-06-05 03:50:54,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:50:54,687 INFO L482 AbstractCegarLoop]: Abstraction has 6842 states and 17646 transitions. [2021-06-05 03:50:54,687 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:54,687 INFO L276 IsEmpty]: Start isEmpty. Operand 6842 states and 17646 transitions. [2021-06-05 03:50:54,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 03:50:54,692 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:50:54,692 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:50:54,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable449,230 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:50:54,892 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:50:54,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:50:54,892 INFO L82 PathProgramCache]: Analyzing trace with hash -1756508830, now seen corresponding path program 123 times [2021-06-05 03:50:54,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:50:54,892 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608896068] [2021-06-05 03:50:54,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:50:54,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:50:54,959 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 28 proven. 69 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:50:54,959 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:50:54,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608896068] [2021-06-05 03:50:54,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608896068] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:54,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102051872] [2021-06-05 03:50:54,959 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:50:55,013 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-05 03:50:55,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:50:55,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 03:50:55,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:50:55,074 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 28 proven. 69 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:50:55,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102051872] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:55,075 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:50:55,075 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 03:50:55,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896039495] [2021-06-05 03:50:55,075 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 03:50:55,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:50:55,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 03:50:55,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-06-05 03:50:55,075 INFO L87 Difference]: Start difference. First operand 6842 states and 17646 transitions. Second operand has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:55,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:50:55,208 INFO L93 Difference]: Finished difference Result 8382 states and 20407 transitions. [2021-06-05 03:50:55,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 03:50:55,209 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 03:50:55,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:50:55,217 INFO L225 Difference]: With dead ends: 8382 [2021-06-05 03:50:55,217 INFO L226 Difference]: Without dead ends: 8358 [2021-06-05 03:50:55,217 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 64.6ms TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:50:55,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8358 states. [2021-06-05 03:50:55,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8358 to 6842. [2021-06-05 03:50:55,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6842 states, 6841 states have (on average 2.5778394971495397) internal successors, (17635), 6841 states have internal predecessors, (17635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:55,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6842 states to 6842 states and 17635 transitions. [2021-06-05 03:50:55,293 INFO L78 Accepts]: Start accepts. Automaton has 6842 states and 17635 transitions. Word has length 47 [2021-06-05 03:50:55,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:50:55,293 INFO L482 AbstractCegarLoop]: Abstraction has 6842 states and 17635 transitions. [2021-06-05 03:50:55,293 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:55,293 INFO L276 IsEmpty]: Start isEmpty. Operand 6842 states and 17635 transitions. [2021-06-05 03:50:55,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 03:50:55,297 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:50:55,297 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:50:55,497 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable450 [2021-06-05 03:50:55,497 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:50:55,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:50:55,497 INFO L82 PathProgramCache]: Analyzing trace with hash 1160735891, now seen corresponding path program 124 times [2021-06-05 03:50:55,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:50:55,498 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978848850] [2021-06-05 03:50:55,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:50:55,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:50:55,566 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 81 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:50:55,566 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:50:55,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978848850] [2021-06-05 03:50:55,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978848850] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:55,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391088764] [2021-06-05 03:50:55,566 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:50:55,591 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:50:55,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:50:55,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 03:50:55,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:50:55,651 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 82 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:50:55,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391088764] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:55,652 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:50:55,652 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 03:50:55,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691520591] [2021-06-05 03:50:55,652 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 03:50:55,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:50:55,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 03:50:55,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:50:55,652 INFO L87 Difference]: Start difference. First operand 6842 states and 17635 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:56,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:50:56,329 INFO L93 Difference]: Finished difference Result 11528 states and 27416 transitions. [2021-06-05 03:50:56,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 03:50:56,330 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 03:50:56,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:50:56,340 INFO L225 Difference]: With dead ends: 11528 [2021-06-05 03:50:56,340 INFO L226 Difference]: Without dead ends: 11348 [2021-06-05 03:50:56,341 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 306.4ms TimeCoverageRelationStatistics Valid=219, Invalid=1421, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 03:50:56,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11348 states. [2021-06-05 03:50:56,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11348 to 7099. [2021-06-05 03:50:56,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7099 states, 7098 states have (on average 2.5736827275288814) internal successors, (18268), 7098 states have internal predecessors, (18268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:56,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7099 states to 7099 states and 18268 transitions. [2021-06-05 03:50:56,435 INFO L78 Accepts]: Start accepts. Automaton has 7099 states and 18268 transitions. Word has length 47 [2021-06-05 03:50:56,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:50:56,436 INFO L482 AbstractCegarLoop]: Abstraction has 7099 states and 18268 transitions. [2021-06-05 03:50:56,436 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:56,436 INFO L276 IsEmpty]: Start isEmpty. Operand 7099 states and 18268 transitions. [2021-06-05 03:50:56,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 03:50:56,440 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:50:56,440 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:50:56,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable454 [2021-06-05 03:50:56,640 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:50:56,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:50:56,641 INFO L82 PathProgramCache]: Analyzing trace with hash 1547338568, now seen corresponding path program 125 times [2021-06-05 03:50:56,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:50:56,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896524788] [2021-06-05 03:50:56,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:50:56,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:50:56,702 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 26 proven. 71 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:50:56,703 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:50:56,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896524788] [2021-06-05 03:50:56,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896524788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:56,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579667291] [2021-06-05 03:50:56,703 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:50:56,729 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-05 03:50:56,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:50:56,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 03:50:56,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:50:56,807 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 26 proven. 71 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:50:56,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579667291] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:56,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:50:56,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 14 [2021-06-05 03:50:56,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98529620] [2021-06-05 03:50:56,807 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 03:50:56,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:50:56,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 03:50:56,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:50:56,808 INFO L87 Difference]: Start difference. First operand 7099 states and 18268 transitions. Second operand has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:57,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:50:57,032 INFO L93 Difference]: Finished difference Result 8869 states and 21483 transitions. [2021-06-05 03:50:57,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 03:50:57,032 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 03:50:57,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:50:57,041 INFO L225 Difference]: With dead ends: 8869 [2021-06-05 03:50:57,041 INFO L226 Difference]: Without dead ends: 8836 [2021-06-05 03:50:57,042 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 100.8ms TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:50:57,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8836 states. [2021-06-05 03:50:57,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8836 to 7099. [2021-06-05 03:50:57,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7099 states, 7098 states have (on average 2.5732600732600734) internal successors, (18265), 7098 states have internal predecessors, (18265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:57,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7099 states to 7099 states and 18265 transitions. [2021-06-05 03:50:57,124 INFO L78 Accepts]: Start accepts. Automaton has 7099 states and 18265 transitions. Word has length 47 [2021-06-05 03:50:57,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:50:57,124 INFO L482 AbstractCegarLoop]: Abstraction has 7099 states and 18265 transitions. [2021-06-05 03:50:57,124 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:57,124 INFO L276 IsEmpty]: Start isEmpty. Operand 7099 states and 18265 transitions. [2021-06-05 03:50:57,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 03:50:57,128 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:50:57,128 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:50:57,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable455 [2021-06-05 03:50:57,329 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:50:57,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:50:57,329 INFO L82 PathProgramCache]: Analyzing trace with hash 1101044381, now seen corresponding path program 126 times [2021-06-05 03:50:57,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:50:57,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153939939] [2021-06-05 03:50:57,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:50:57,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:50:57,407 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 81 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:50:57,408 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:50:57,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153939939] [2021-06-05 03:50:57,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153939939] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:57,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796831459] [2021-06-05 03:50:57,408 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:50:57,435 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-06-05 03:50:57,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:50:57,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 03:50:57,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:50:57,495 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 82 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:50:57,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796831459] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:57,495 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:50:57,495 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 03:50:57,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485207297] [2021-06-05 03:50:57,496 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 03:50:57,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:50:57,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 03:50:57,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:50:57,496 INFO L87 Difference]: Start difference. First operand 7099 states and 18265 transitions. Second operand has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:58,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:50:58,447 INFO L93 Difference]: Finished difference Result 13900 states and 32512 transitions. [2021-06-05 03:50:58,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-05 03:50:58,447 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 03:50:58,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:50:58,461 INFO L225 Difference]: With dead ends: 13900 [2021-06-05 03:50:58,461 INFO L226 Difference]: Without dead ends: 13624 [2021-06-05 03:50:58,462 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1372 ImplicationChecksByTransitivity, 567.8ms TimeCoverageRelationStatistics Valid=489, Invalid=3671, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 03:50:58,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13624 states. [2021-06-05 03:50:58,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13624 to 7315. [2021-06-05 03:50:58,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7315 states, 7314 states have (on average 2.568635493573968) internal successors, (18787), 7314 states have internal predecessors, (18787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:58,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7315 states to 7315 states and 18787 transitions. [2021-06-05 03:50:58,584 INFO L78 Accepts]: Start accepts. Automaton has 7315 states and 18787 transitions. Word has length 47 [2021-06-05 03:50:58,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:50:58,584 INFO L482 AbstractCegarLoop]: Abstraction has 7315 states and 18787 transitions. [2021-06-05 03:50:58,584 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:58,584 INFO L276 IsEmpty]: Start isEmpty. Operand 7315 states and 18787 transitions. [2021-06-05 03:50:58,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 03:50:58,589 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:50:58,589 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:50:58,789 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable460,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:50:58,789 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:50:58,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:50:58,789 INFO L82 PathProgramCache]: Analyzing trace with hash -1300350046, now seen corresponding path program 127 times [2021-06-05 03:50:58,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:50:58,790 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097756742] [2021-06-05 03:50:58,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:50:58,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:50:58,860 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 30 proven. 67 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:50:58,860 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:50:58,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097756742] [2021-06-05 03:50:58,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097756742] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:58,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867437947] [2021-06-05 03:50:58,860 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:50:58,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:50:58,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 03:50:58,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:50:58,948 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 30 proven. 67 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:50:58,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867437947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:58,948 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:50:58,948 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-06-05 03:50:58,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859623928] [2021-06-05 03:50:58,948 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 03:50:58,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:50:58,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 03:50:58,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:50:58,949 INFO L87 Difference]: Start difference. First operand 7315 states and 18787 transitions. Second operand has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:59,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:50:59,126 INFO L93 Difference]: Finished difference Result 9027 states and 21871 transitions. [2021-06-05 03:50:59,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 03:50:59,126 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 03:50:59,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:50:59,134 INFO L225 Difference]: With dead ends: 9027 [2021-06-05 03:50:59,134 INFO L226 Difference]: Without dead ends: 8985 [2021-06-05 03:50:59,134 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 98.5ms TimeCoverageRelationStatistics Valid=102, Invalid=204, Unknown=0, NotChecked=0, Total=306 [2021-06-05 03:50:59,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8985 states. [2021-06-05 03:50:59,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8985 to 7097. [2021-06-05 03:50:59,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7097 states, 7096 states have (on average 2.5593291995490417) internal successors, (18161), 7096 states have internal predecessors, (18161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:59,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7097 states to 7097 states and 18161 transitions. [2021-06-05 03:50:59,215 INFO L78 Accepts]: Start accepts. Automaton has 7097 states and 18161 transitions. Word has length 47 [2021-06-05 03:50:59,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:50:59,215 INFO L482 AbstractCegarLoop]: Abstraction has 7097 states and 18161 transitions. [2021-06-05 03:50:59,215 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:50:59,215 INFO L276 IsEmpty]: Start isEmpty. Operand 7097 states and 18161 transitions. [2021-06-05 03:50:59,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 03:50:59,220 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:50:59,220 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:50:59,420 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable461,235 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:50:59,421 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:50:59,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:50:59,421 INFO L82 PathProgramCache]: Analyzing trace with hash 947730515, now seen corresponding path program 128 times [2021-06-05 03:50:59,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:50:59,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274854199] [2021-06-05 03:50:59,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:50:59,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:50:59,507 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:50:59,507 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:50:59,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274854199] [2021-06-05 03:50:59,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274854199] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:59,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537647332] [2021-06-05 03:50:59,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:50:59,532 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:50:59,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:50:59,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 03:50:59,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:50:59,592 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:50:59,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537647332] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:50:59,593 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:50:59,593 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 03:50:59,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574688437] [2021-06-05 03:50:59,593 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:50:59,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:50:59,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:50:59,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:50:59,593 INFO L87 Difference]: Start difference. First operand 7097 states and 18161 transitions. Second operand has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:00,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:00,065 INFO L93 Difference]: Finished difference Result 9058 states and 21780 transitions. [2021-06-05 03:51:00,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 03:51:00,066 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 03:51:00,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:00,074 INFO L225 Difference]: With dead ends: 9058 [2021-06-05 03:51:00,074 INFO L226 Difference]: Without dead ends: 8680 [2021-06-05 03:51:00,074 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 220.2ms TimeCoverageRelationStatistics Valid=132, Invalid=624, Unknown=0, NotChecked=0, Total=756 [2021-06-05 03:51:00,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8680 states. [2021-06-05 03:51:00,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8680 to 6394. [2021-06-05 03:51:00,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6394 states, 6393 states have (on average 2.564210855623338) internal successors, (16393), 6393 states have internal predecessors, (16393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:00,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6394 states to 6394 states and 16393 transitions. [2021-06-05 03:51:00,146 INFO L78 Accepts]: Start accepts. Automaton has 6394 states and 16393 transitions. Word has length 47 [2021-06-05 03:51:00,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:00,146 INFO L482 AbstractCegarLoop]: Abstraction has 6394 states and 16393 transitions. [2021-06-05 03:51:00,146 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:00,146 INFO L276 IsEmpty]: Start isEmpty. Operand 6394 states and 16393 transitions. [2021-06-05 03:51:00,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 03:51:00,149 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:00,150 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:00,350 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable467,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:00,350 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:00,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:00,350 INFO L82 PathProgramCache]: Analyzing trace with hash 87788588, now seen corresponding path program 58 times [2021-06-05 03:51:00,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:00,350 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070103784] [2021-06-05 03:51:00,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:00,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:00,399 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 75 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:51:00,400 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:00,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070103784] [2021-06-05 03:51:00,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070103784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:00,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26534593] [2021-06-05 03:51:00,400 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:00,424 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:51:00,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:51:00,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 03:51:00,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:51:00,489 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 76 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:51:00,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26534593] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:00,490 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:51:00,490 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 10 [2021-06-05 03:51:00,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672786444] [2021-06-05 03:51:00,490 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 03:51:00,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:00,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 03:51:00,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-06-05 03:51:00,490 INFO L87 Difference]: Start difference. First operand 6394 states and 16393 transitions. Second operand has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:00,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:00,670 INFO L93 Difference]: Finished difference Result 9182 states and 22469 transitions. [2021-06-05 03:51:00,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 03:51:00,670 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 03:51:00,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:00,678 INFO L225 Difference]: With dead ends: 9182 [2021-06-05 03:51:00,678 INFO L226 Difference]: Without dead ends: 9182 [2021-06-05 03:51:00,678 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 78.8ms TimeCoverageRelationStatistics Valid=101, Invalid=139, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:51:00,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9182 states. [2021-06-05 03:51:00,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9182 to 6584. [2021-06-05 03:51:00,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6584 states, 6583 states have (on average 2.5773963238644995) internal successors, (16967), 6583 states have internal predecessors, (16967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:00,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6584 states to 6584 states and 16967 transitions. [2021-06-05 03:51:00,753 INFO L78 Accepts]: Start accepts. Automaton has 6584 states and 16967 transitions. Word has length 47 [2021-06-05 03:51:00,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:00,754 INFO L482 AbstractCegarLoop]: Abstraction has 6584 states and 16967 transitions. [2021-06-05 03:51:00,754 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:00,754 INFO L276 IsEmpty]: Start isEmpty. Operand 6584 states and 16967 transitions. [2021-06-05 03:51:00,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 03:51:00,757 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:00,757 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:00,958 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable468 [2021-06-05 03:51:00,958 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:00,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:00,958 INFO L82 PathProgramCache]: Analyzing trace with hash -1549783868, now seen corresponding path program 59 times [2021-06-05 03:51:00,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:00,958 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180041882] [2021-06-05 03:51:00,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:00,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:01,014 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 75 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:51:01,014 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:01,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180041882] [2021-06-05 03:51:01,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180041882] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:01,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370939863] [2021-06-05 03:51:01,014 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:01,042 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-06-05 03:51:01,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:51:01,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 03:51:01,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:51:01,234 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 76 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:51:01,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370939863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:01,234 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:51:01,234 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 24 [2021-06-05 03:51:01,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232046212] [2021-06-05 03:51:01,235 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 03:51:01,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:01,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 03:51:01,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=430, Unknown=0, NotChecked=0, Total=600 [2021-06-05 03:51:01,235 INFO L87 Difference]: Start difference. First operand 6584 states and 16967 transitions. Second operand has 25 states, 25 states have (on average 3.32) internal successors, (83), 24 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:01,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:01,824 INFO L93 Difference]: Finished difference Result 10546 states and 25434 transitions. [2021-06-05 03:51:01,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 03:51:01,825 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.32) internal successors, (83), 24 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 03:51:01,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:01,834 INFO L225 Difference]: With dead ends: 10546 [2021-06-05 03:51:01,834 INFO L226 Difference]: Without dead ends: 10546 [2021-06-05 03:51:01,834 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 384.3ms TimeCoverageRelationStatistics Valid=568, Invalid=1154, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 03:51:01,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10546 states. [2021-06-05 03:51:01,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10546 to 6608. [2021-06-05 03:51:01,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6608 states, 6607 states have (on average 2.5784773724837295) internal successors, (17036), 6607 states have internal predecessors, (17036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:01,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6608 states to 6608 states and 17036 transitions. [2021-06-05 03:51:01,917 INFO L78 Accepts]: Start accepts. Automaton has 6608 states and 17036 transitions. Word has length 47 [2021-06-05 03:51:01,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:01,917 INFO L482 AbstractCegarLoop]: Abstraction has 6608 states and 17036 transitions. [2021-06-05 03:51:01,917 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 3.32) internal successors, (83), 24 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:01,917 INFO L276 IsEmpty]: Start isEmpty. Operand 6608 states and 17036 transitions. [2021-06-05 03:51:01,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 03:51:01,921 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:01,921 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:02,121 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable469,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:02,121 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:02,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:02,122 INFO L82 PathProgramCache]: Analyzing trace with hash 1055188264, now seen corresponding path program 60 times [2021-06-05 03:51:02,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:02,122 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780878970] [2021-06-05 03:51:02,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:02,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:02,185 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 71 proven. 26 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:51:02,186 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:02,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780878970] [2021-06-05 03:51:02,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780878970] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:02,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539356995] [2021-06-05 03:51:02,186 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:02,213 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-06-05 03:51:02,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:51:02,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 03:51:02,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:51:02,280 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 72 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:51:02,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539356995] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:02,280 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:51:02,280 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 12 [2021-06-05 03:51:02,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669211755] [2021-06-05 03:51:02,280 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 03:51:02,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:02,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 03:51:02,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:51:02,281 INFO L87 Difference]: Start difference. First operand 6608 states and 17036 transitions. Second operand has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:02,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:02,576 INFO L93 Difference]: Finished difference Result 9881 states and 24078 transitions. [2021-06-05 03:51:02,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 03:51:02,577 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 03:51:02,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:02,586 INFO L225 Difference]: With dead ends: 9881 [2021-06-05 03:51:02,586 INFO L226 Difference]: Without dead ends: 9881 [2021-06-05 03:51:02,586 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 146.0ms TimeCoverageRelationStatistics Valid=213, Invalid=339, Unknown=0, NotChecked=0, Total=552 [2021-06-05 03:51:02,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9881 states. [2021-06-05 03:51:02,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9881 to 6643. [2021-06-05 03:51:02,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6643 states, 6642 states have (on average 2.580246913580247) internal successors, (17138), 6642 states have internal predecessors, (17138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:02,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6643 states to 6643 states and 17138 transitions. [2021-06-05 03:51:02,671 INFO L78 Accepts]: Start accepts. Automaton has 6643 states and 17138 transitions. Word has length 47 [2021-06-05 03:51:02,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:02,671 INFO L482 AbstractCegarLoop]: Abstraction has 6643 states and 17138 transitions. [2021-06-05 03:51:02,671 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:02,671 INFO L276 IsEmpty]: Start isEmpty. Operand 6643 states and 17138 transitions. [2021-06-05 03:51:02,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 03:51:02,675 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:02,675 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:02,875 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable470,239 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:02,875 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:02,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:02,876 INFO L82 PathProgramCache]: Analyzing trace with hash 15901252, now seen corresponding path program 61 times [2021-06-05 03:51:02,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:02,876 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105680011] [2021-06-05 03:51:02,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:02,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:02,950 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 67 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:51:02,950 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:02,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105680011] [2021-06-05 03:51:02,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105680011] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:02,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58254914] [2021-06-05 03:51:02,951 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:02,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:02,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 03:51:02,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:51:03,049 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 68 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:51:03,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58254914] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:03,050 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:51:03,050 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2021-06-05 03:51:03,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497311409] [2021-06-05 03:51:03,050 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:51:03,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:03,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:51:03,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:51:03,050 INFO L87 Difference]: Start difference. First operand 6643 states and 17138 transitions. Second operand has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:03,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:03,353 INFO L93 Difference]: Finished difference Result 9085 states and 22271 transitions. [2021-06-05 03:51:03,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 03:51:03,353 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 03:51:03,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:03,362 INFO L225 Difference]: With dead ends: 9085 [2021-06-05 03:51:03,362 INFO L226 Difference]: Without dead ends: 9085 [2021-06-05 03:51:03,362 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 159.9ms TimeCoverageRelationStatistics Valid=227, Invalid=373, Unknown=0, NotChecked=0, Total=600 [2021-06-05 03:51:03,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9085 states. [2021-06-05 03:51:03,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9085 to 6641. [2021-06-05 03:51:03,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6641 states, 6640 states have (on average 2.5802710843373493) internal successors, (17133), 6640 states have internal predecessors, (17133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:03,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6641 states to 6641 states and 17133 transitions. [2021-06-05 03:51:03,447 INFO L78 Accepts]: Start accepts. Automaton has 6641 states and 17133 transitions. Word has length 47 [2021-06-05 03:51:03,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:03,447 INFO L482 AbstractCegarLoop]: Abstraction has 6641 states and 17133 transitions. [2021-06-05 03:51:03,447 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:03,448 INFO L276 IsEmpty]: Start isEmpty. Operand 6641 states and 17133 transitions. [2021-06-05 03:51:03,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 03:51:03,451 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:03,451 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:03,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable471,240 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:03,652 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:03,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:03,652 INFO L82 PathProgramCache]: Analyzing trace with hash 1035763624, now seen corresponding path program 62 times [2021-06-05 03:51:03,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:03,652 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007183342] [2021-06-05 03:51:03,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:03,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:03,736 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 63 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:51:03,736 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:03,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007183342] [2021-06-05 03:51:03,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007183342] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:03,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795193516] [2021-06-05 03:51:03,737 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:03,761 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:51:03,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:51:03,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 03:51:03,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:51:03,829 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 64 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:03,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795193516] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:03,829 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:51:03,829 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 14 [2021-06-05 03:51:03,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831372917] [2021-06-05 03:51:03,829 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 03:51:03,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:03,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 03:51:03,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:51:03,829 INFO L87 Difference]: Start difference. First operand 6641 states and 17133 transitions. Second operand has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:04,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:04,161 INFO L93 Difference]: Finished difference Result 7979 states and 19784 transitions. [2021-06-05 03:51:04,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 03:51:04,161 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 03:51:04,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:04,168 INFO L225 Difference]: With dead ends: 7979 [2021-06-05 03:51:04,169 INFO L226 Difference]: Without dead ends: 7979 [2021-06-05 03:51:04,169 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 158.1ms TimeCoverageRelationStatistics Valid=199, Invalid=353, Unknown=0, NotChecked=0, Total=552 [2021-06-05 03:51:04,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7979 states. [2021-06-05 03:51:04,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7979 to 6178. [2021-06-05 03:51:04,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6178 states, 6177 states have (on average 2.5810263882143434) internal successors, (15943), 6177 states have internal predecessors, (15943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:04,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6178 states to 6178 states and 15943 transitions. [2021-06-05 03:51:04,235 INFO L78 Accepts]: Start accepts. Automaton has 6178 states and 15943 transitions. Word has length 47 [2021-06-05 03:51:04,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:04,235 INFO L482 AbstractCegarLoop]: Abstraction has 6178 states and 15943 transitions. [2021-06-05 03:51:04,235 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:04,235 INFO L276 IsEmpty]: Start isEmpty. Operand 6178 states and 15943 transitions. [2021-06-05 03:51:04,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 03:51:04,239 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:04,239 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:04,439 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable472,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:04,439 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:04,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:04,439 INFO L82 PathProgramCache]: Analyzing trace with hash 1697148168, now seen corresponding path program 129 times [2021-06-05 03:51:04,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:04,439 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950669011] [2021-06-05 03:51:04,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:04,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:04,521 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 41 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:51:04,521 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:04,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950669011] [2021-06-05 03:51:04,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950669011] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:04,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061657598] [2021-06-05 03:51:04,522 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:04,548 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 03:51:04,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:51:04,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 03:51:04,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:51:04,614 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 41 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:51:04,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061657598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:04,614 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:51:04,614 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-06-05 03:51:04,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963600818] [2021-06-05 03:51:04,614 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:51:04,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:04,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:51:04,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:51:04,614 INFO L87 Difference]: Start difference. First operand 6178 states and 15943 transitions. Second operand has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:04,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:04,803 INFO L93 Difference]: Finished difference Result 7415 states and 18154 transitions. [2021-06-05 03:51:04,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 03:51:04,803 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 03:51:04,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:04,809 INFO L225 Difference]: With dead ends: 7415 [2021-06-05 03:51:04,809 INFO L226 Difference]: Without dead ends: 7370 [2021-06-05 03:51:04,809 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 120.0ms TimeCoverageRelationStatistics Valid=123, Invalid=257, Unknown=0, NotChecked=0, Total=380 [2021-06-05 03:51:04,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7370 states. [2021-06-05 03:51:04,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7370 to 6187. [2021-06-05 03:51:04,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6187 states, 6186 states have (on average 2.5796960879405106) internal successors, (15958), 6186 states have internal predecessors, (15958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:04,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6187 states to 6187 states and 15958 transitions. [2021-06-05 03:51:04,877 INFO L78 Accepts]: Start accepts. Automaton has 6187 states and 15958 transitions. Word has length 47 [2021-06-05 03:51:04,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:04,877 INFO L482 AbstractCegarLoop]: Abstraction has 6187 states and 15958 transitions. [2021-06-05 03:51:04,877 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:04,878 INFO L276 IsEmpty]: Start isEmpty. Operand 6187 states and 15958 transitions. [2021-06-05 03:51:04,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 03:51:04,881 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:04,881 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:05,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable473,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:05,089 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:05,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:05,089 INFO L82 PathProgramCache]: Analyzing trace with hash -686375646, now seen corresponding path program 130 times [2021-06-05 03:51:05,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:05,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351323754] [2021-06-05 03:51:05,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:05,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:05,174 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 49 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:51:05,174 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:05,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351323754] [2021-06-05 03:51:05,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351323754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:05,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530237002] [2021-06-05 03:51:05,175 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:05,199 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:51:05,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:51:05,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 03:51:05,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:51:05,264 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 49 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:51:05,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530237002] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:05,265 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:51:05,265 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-06-05 03:51:05,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494155779] [2021-06-05 03:51:05,265 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:51:05,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:05,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:51:05,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:51:05,265 INFO L87 Difference]: Start difference. First operand 6187 states and 15958 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:05,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:05,582 INFO L93 Difference]: Finished difference Result 7945 states and 19639 transitions. [2021-06-05 03:51:05,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 03:51:05,582 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 03:51:05,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:05,589 INFO L225 Difference]: With dead ends: 7945 [2021-06-05 03:51:05,590 INFO L226 Difference]: Without dead ends: 7945 [2021-06-05 03:51:05,590 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 154.4ms TimeCoverageRelationStatistics Valid=182, Invalid=324, Unknown=0, NotChecked=0, Total=506 [2021-06-05 03:51:05,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7945 states. [2021-06-05 03:51:05,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7945 to 6576. [2021-06-05 03:51:05,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6576 states, 6575 states have (on average 2.607148288973384) internal successors, (17142), 6575 states have internal predecessors, (17142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:05,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6576 states to 6576 states and 17142 transitions. [2021-06-05 03:51:05,662 INFO L78 Accepts]: Start accepts. Automaton has 6576 states and 17142 transitions. Word has length 47 [2021-06-05 03:51:05,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:05,663 INFO L482 AbstractCegarLoop]: Abstraction has 6576 states and 17142 transitions. [2021-06-05 03:51:05,663 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:05,663 INFO L276 IsEmpty]: Start isEmpty. Operand 6576 states and 17142 transitions. [2021-06-05 03:51:05,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 03:51:05,666 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:05,667 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:05,867 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable480 [2021-06-05 03:51:05,867 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:05,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:05,867 INFO L82 PathProgramCache]: Analyzing trace with hash 1627893973, now seen corresponding path program 63 times [2021-06-05 03:51:05,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:05,867 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311889264] [2021-06-05 03:51:05,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:05,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:05,956 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 89 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:51:05,957 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:05,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311889264] [2021-06-05 03:51:05,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311889264] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:05,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733319710] [2021-06-05 03:51:05,957 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:05,984 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 03:51:05,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:51:05,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 03:51:05,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:51:06,046 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 89 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:51:06,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733319710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:06,046 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:51:06,046 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 03:51:06,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146138377] [2021-06-05 03:51:06,046 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:51:06,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:06,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:51:06,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:51:06,047 INFO L87 Difference]: Start difference. First operand 6576 states and 17142 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:06,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:06,482 INFO L93 Difference]: Finished difference Result 9298 states and 22741 transitions. [2021-06-05 03:51:06,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 03:51:06,482 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 03:51:06,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:06,489 INFO L225 Difference]: With dead ends: 9298 [2021-06-05 03:51:06,490 INFO L226 Difference]: Without dead ends: 9166 [2021-06-05 03:51:06,490 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 230.5ms TimeCoverageRelationStatistics Valid=132, Invalid=624, Unknown=0, NotChecked=0, Total=756 [2021-06-05 03:51:06,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9166 states. [2021-06-05 03:51:06,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9166 to 6568. [2021-06-05 03:51:06,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6568 states, 6567 states have (on average 2.607735647936653) internal successors, (17125), 6567 states have internal predecessors, (17125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:06,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6568 states to 6568 states and 17125 transitions. [2021-06-05 03:51:06,584 INFO L78 Accepts]: Start accepts. Automaton has 6568 states and 17125 transitions. Word has length 47 [2021-06-05 03:51:06,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:06,584 INFO L482 AbstractCegarLoop]: Abstraction has 6568 states and 17125 transitions. [2021-06-05 03:51:06,584 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:06,584 INFO L276 IsEmpty]: Start isEmpty. Operand 6568 states and 17125 transitions. [2021-06-05 03:51:06,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 03:51:06,587 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:06,587 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:06,788 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable481,244 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:06,788 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:06,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:06,788 INFO L82 PathProgramCache]: Analyzing trace with hash 1148331157, now seen corresponding path program 131 times [2021-06-05 03:51:06,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:06,788 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132157240] [2021-06-05 03:51:06,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:06,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:06,888 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 14 proven. 81 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:51:06,889 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:06,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132157240] [2021-06-05 03:51:06,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132157240] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:06,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796983576] [2021-06-05 03:51:06,889 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:06,915 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 03:51:06,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:51:06,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 03:51:06,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:51:07,081 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 11 proven. 84 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:51:07,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796983576] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:07,081 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:51:07,081 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 03:51:07,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363698824] [2021-06-05 03:51:07,082 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 03:51:07,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:07,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 03:51:07,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 03:51:07,082 INFO L87 Difference]: Start difference. First operand 6568 states and 17125 transitions. Second operand has 18 states, 18 states have (on average 3.5) internal successors, (63), 17 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:07,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:07,583 INFO L93 Difference]: Finished difference Result 6738 states and 17392 transitions. [2021-06-05 03:51:07,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 03:51:07,583 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.5) internal successors, (63), 17 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 03:51:07,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:07,590 INFO L225 Difference]: With dead ends: 6738 [2021-06-05 03:51:07,590 INFO L226 Difference]: Without dead ends: 6682 [2021-06-05 03:51:07,590 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 171.2ms TimeCoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:51:07,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6682 states. [2021-06-05 03:51:07,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6682 to 6568. [2021-06-05 03:51:07,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6568 states, 6567 states have (on average 2.6045378407187454) internal successors, (17104), 6567 states have internal predecessors, (17104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:07,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6568 states to 6568 states and 17104 transitions. [2021-06-05 03:51:07,657 INFO L78 Accepts]: Start accepts. Automaton has 6568 states and 17104 transitions. Word has length 47 [2021-06-05 03:51:07,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:07,657 INFO L482 AbstractCegarLoop]: Abstraction has 6568 states and 17104 transitions. [2021-06-05 03:51:07,657 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.5) internal successors, (63), 17 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:07,657 INFO L276 IsEmpty]: Start isEmpty. Operand 6568 states and 17104 transitions. [2021-06-05 03:51:07,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 03:51:07,661 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:07,661 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:07,861 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable482 [2021-06-05 03:51:07,862 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:07,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:07,862 INFO L82 PathProgramCache]: Analyzing trace with hash -759601188, now seen corresponding path program 64 times [2021-06-05 03:51:07,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:07,862 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632937038] [2021-06-05 03:51:07,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:07,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:07,934 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 35 proven. 61 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:51:07,934 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:07,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632937038] [2021-06-05 03:51:07,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632937038] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:07,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254803048] [2021-06-05 03:51:07,935 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:07,959 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:51:07,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:51:07,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 03:51:07,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:51:08,027 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 36 proven. 61 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:51:08,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254803048] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:08,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:51:08,027 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2021-06-05 03:51:08,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651900744] [2021-06-05 03:51:08,027 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:51:08,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:08,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:51:08,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:51:08,027 INFO L87 Difference]: Start difference. First operand 6568 states and 17104 transitions. Second operand has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 13 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:08,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:08,231 INFO L93 Difference]: Finished difference Result 8053 states and 20088 transitions. [2021-06-05 03:51:08,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 03:51:08,232 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 13 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 03:51:08,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:08,239 INFO L225 Difference]: With dead ends: 8053 [2021-06-05 03:51:08,239 INFO L226 Difference]: Without dead ends: 7951 [2021-06-05 03:51:08,239 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 107.9ms TimeCoverageRelationStatistics Valid=109, Invalid=233, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:51:08,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7951 states. [2021-06-05 03:51:08,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7951 to 6416. [2021-06-05 03:51:08,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6416 states, 6415 states have (on average 2.6084177708495715) internal successors, (16733), 6415 states have internal predecessors, (16733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:08,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6416 states to 6416 states and 16733 transitions. [2021-06-05 03:51:08,309 INFO L78 Accepts]: Start accepts. Automaton has 6416 states and 16733 transitions. Word has length 47 [2021-06-05 03:51:08,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:08,309 INFO L482 AbstractCegarLoop]: Abstraction has 6416 states and 16733 transitions. [2021-06-05 03:51:08,309 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 13 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:08,309 INFO L276 IsEmpty]: Start isEmpty. Operand 6416 states and 16733 transitions. [2021-06-05 03:51:08,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 03:51:08,312 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:08,312 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:08,513 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable483,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:08,513 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:08,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:08,513 INFO L82 PathProgramCache]: Analyzing trace with hash 372425610, now seen corresponding path program 132 times [2021-06-05 03:51:08,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:08,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649549200] [2021-06-05 03:51:08,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:08,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:08,588 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 47 proven. 50 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:51:08,589 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:08,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649549200] [2021-06-05 03:51:08,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649549200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:08,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122006715] [2021-06-05 03:51:08,589 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:08,616 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-05 03:51:08,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:51:08,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 03:51:08,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:51:08,722 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 80 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:51:08,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122006715] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:08,722 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:51:08,722 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 03:51:08,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883897519] [2021-06-05 03:51:08,723 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 03:51:08,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:08,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 03:51:08,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:51:08,723 INFO L87 Difference]: Start difference. First operand 6416 states and 16733 transitions. Second operand has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 16 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:09,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:09,001 INFO L93 Difference]: Finished difference Result 8176 states and 20353 transitions. [2021-06-05 03:51:09,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 03:51:09,002 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 16 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 03:51:09,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:09,009 INFO L225 Difference]: With dead ends: 8176 [2021-06-05 03:51:09,010 INFO L226 Difference]: Without dead ends: 8176 [2021-06-05 03:51:09,010 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 168.7ms TimeCoverageRelationStatistics Valid=203, Invalid=349, Unknown=0, NotChecked=0, Total=552 [2021-06-05 03:51:09,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8176 states. [2021-06-05 03:51:09,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8176 to 6714. [2021-06-05 03:51:09,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6714 states, 6713 states have (on average 2.627588261582005) internal successors, (17639), 6713 states have internal predecessors, (17639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:09,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6714 states to 6714 states and 17639 transitions. [2021-06-05 03:51:09,091 INFO L78 Accepts]: Start accepts. Automaton has 6714 states and 17639 transitions. Word has length 47 [2021-06-05 03:51:09,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:09,091 INFO L482 AbstractCegarLoop]: Abstraction has 6714 states and 17639 transitions. [2021-06-05 03:51:09,091 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 16 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:09,091 INFO L276 IsEmpty]: Start isEmpty. Operand 6714 states and 17639 transitions. [2021-06-05 03:51:09,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 03:51:09,095 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:09,095 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:09,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 247 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable489 [2021-06-05 03:51:09,296 INFO L430 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:09,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:09,297 INFO L82 PathProgramCache]: Analyzing trace with hash 1064796407, now seen corresponding path program 65 times [2021-06-05 03:51:09,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:09,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177576796] [2021-06-05 03:51:09,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:09,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:09,373 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 89 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:51:09,374 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:09,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177576796] [2021-06-05 03:51:09,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177576796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:09,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076622273] [2021-06-05 03:51:09,374 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:09,402 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 03:51:09,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:51:09,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 03:51:09,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:51:09,463 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 89 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:51:09,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076622273] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:09,464 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:51:09,464 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 03:51:09,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814639585] [2021-06-05 03:51:09,464 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 03:51:09,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:09,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 03:51:09,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:51:09,464 INFO L87 Difference]: Start difference. First operand 6714 states and 17639 transitions. Second operand has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:09,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:09,888 INFO L93 Difference]: Finished difference Result 8947 states and 22376 transitions. [2021-06-05 03:51:09,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 03:51:09,889 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 03:51:09,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:09,897 INFO L225 Difference]: With dead ends: 8947 [2021-06-05 03:51:09,898 INFO L226 Difference]: Without dead ends: 8933 [2021-06-05 03:51:09,898 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 180.2ms TimeCoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2021-06-05 03:51:09,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8933 states. [2021-06-05 03:51:09,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8933 to 6712. [2021-06-05 03:51:09,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6712 states, 6711 states have (on average 2.633586648785576) internal successors, (17674), 6711 states have internal predecessors, (17674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:09,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6712 states to 6712 states and 17674 transitions. [2021-06-05 03:51:09,975 INFO L78 Accepts]: Start accepts. Automaton has 6712 states and 17674 transitions. Word has length 47 [2021-06-05 03:51:09,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:09,975 INFO L482 AbstractCegarLoop]: Abstraction has 6712 states and 17674 transitions. [2021-06-05 03:51:09,975 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:09,975 INFO L276 IsEmpty]: Start isEmpty. Operand 6712 states and 17674 transitions. [2021-06-05 03:51:09,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 03:51:09,979 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:09,979 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:10,181 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable492,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:10,181 INFO L430 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:10,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:10,181 INFO L82 PathProgramCache]: Analyzing trace with hash 902744311, now seen corresponding path program 133 times [2021-06-05 03:51:10,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:10,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783056727] [2021-06-05 03:51:10,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:10,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:10,268 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 14 proven. 81 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:51:10,268 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:10,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783056727] [2021-06-05 03:51:10,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783056727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:10,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52799308] [2021-06-05 03:51:10,269 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:10,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:10,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 03:51:10,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:51:10,434 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 11 proven. 84 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:51:10,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52799308] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:10,434 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:51:10,434 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-05 03:51:10,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223507557] [2021-06-05 03:51:10,435 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:51:10,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:10,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:51:10,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:51:10,435 INFO L87 Difference]: Start difference. First operand 6712 states and 17674 transitions. Second operand has 16 states, 16 states have (on average 3.75) internal successors, (60), 15 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:10,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:10,880 INFO L93 Difference]: Finished difference Result 6816 states and 17833 transitions. [2021-06-05 03:51:10,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 03:51:10,881 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.75) internal successors, (60), 15 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 03:51:10,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:10,886 INFO L225 Difference]: With dead ends: 6816 [2021-06-05 03:51:10,886 INFO L226 Difference]: Without dead ends: 6772 [2021-06-05 03:51:10,887 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 138.4ms TimeCoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:51:10,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6772 states. [2021-06-05 03:51:10,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6772 to 6712. [2021-06-05 03:51:10,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6712 states, 6711 states have (on average 2.6322455669795857) internal successors, (17665), 6711 states have internal predecessors, (17665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:10,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6712 states to 6712 states and 17665 transitions. [2021-06-05 03:51:10,954 INFO L78 Accepts]: Start accepts. Automaton has 6712 states and 17665 transitions. Word has length 47 [2021-06-05 03:51:10,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:10,954 INFO L482 AbstractCegarLoop]: Abstraction has 6712 states and 17665 transitions. [2021-06-05 03:51:10,954 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.75) internal successors, (60), 15 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:10,954 INFO L276 IsEmpty]: Start isEmpty. Operand 6712 states and 17665 transitions. [2021-06-05 03:51:10,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 03:51:10,958 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:10,958 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:11,158 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable493,249 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:11,158 INFO L430 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:11,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:11,159 INFO L82 PathProgramCache]: Analyzing trace with hash -1077953366, now seen corresponding path program 66 times [2021-06-05 03:51:11,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:11,159 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482188915] [2021-06-05 03:51:11,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:11,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:11,229 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 40 proven. 57 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:51:11,229 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:11,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482188915] [2021-06-05 03:51:11,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482188915] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:11,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14827227] [2021-06-05 03:51:11,229 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:11,256 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 03:51:11,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:51:11,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 03:51:11,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:51:11,335 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 41 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:51:11,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14827227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:11,335 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:51:11,335 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 15 [2021-06-05 03:51:11,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590995813] [2021-06-05 03:51:11,335 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:51:11,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:11,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:51:11,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:51:11,336 INFO L87 Difference]: Start difference. First operand 6712 states and 17665 transitions. Second operand has 16 states, 16 states have (on average 3.8125) internal successors, (61), 15 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:11,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:11,567 INFO L93 Difference]: Finished difference Result 7827 states and 19871 transitions. [2021-06-05 03:51:11,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 03:51:11,568 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.8125) internal successors, (61), 15 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 03:51:11,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:11,574 INFO L225 Difference]: With dead ends: 7827 [2021-06-05 03:51:11,574 INFO L226 Difference]: Without dead ends: 7773 [2021-06-05 03:51:11,575 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 111.0ms TimeCoverageRelationStatistics Valid=98, Invalid=282, Unknown=0, NotChecked=0, Total=380 [2021-06-05 03:51:11,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7773 states. [2021-06-05 03:51:11,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7773 to 6518. [2021-06-05 03:51:11,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6518 states, 6517 states have (on average 2.63265306122449) internal successors, (17157), 6517 states have internal predecessors, (17157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:11,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6518 states to 6518 states and 17157 transitions. [2021-06-05 03:51:11,646 INFO L78 Accepts]: Start accepts. Automaton has 6518 states and 17157 transitions. Word has length 47 [2021-06-05 03:51:11,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:11,646 INFO L482 AbstractCegarLoop]: Abstraction has 6518 states and 17157 transitions. [2021-06-05 03:51:11,646 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.8125) internal successors, (61), 15 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:11,646 INFO L276 IsEmpty]: Start isEmpty. Operand 6518 states and 17157 transitions. [2021-06-05 03:51:11,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 03:51:11,649 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:11,649 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:11,850 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable494,250 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:11,850 INFO L430 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:11,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:11,850 INFO L82 PathProgramCache]: Analyzing trace with hash 1517458978, now seen corresponding path program 134 times [2021-06-05 03:51:11,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:11,850 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425417705] [2021-06-05 03:51:11,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:11,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:11,914 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 45 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:51:11,914 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:11,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425417705] [2021-06-05 03:51:11,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425417705] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:11,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922147485] [2021-06-05 03:51:11,914 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:11,939 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:51:11,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:51:11,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 03:51:11,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:51:12,003 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 45 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:51:12,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922147485] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:12,004 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:51:12,004 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 03:51:12,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983594365] [2021-06-05 03:51:12,004 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 03:51:12,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:12,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 03:51:12,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:51:12,004 INFO L87 Difference]: Start difference. First operand 6518 states and 17157 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:12,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:12,202 INFO L93 Difference]: Finished difference Result 8402 states and 21039 transitions. [2021-06-05 03:51:12,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 03:51:12,202 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 03:51:12,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:12,210 INFO L225 Difference]: With dead ends: 8402 [2021-06-05 03:51:12,210 INFO L226 Difference]: Without dead ends: 8402 [2021-06-05 03:51:12,210 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 92.4ms TimeCoverageRelationStatistics Valid=105, Invalid=167, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:51:12,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8402 states. [2021-06-05 03:51:12,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8402 to 6836. [2021-06-05 03:51:12,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6836 states, 6835 states have (on average 2.651207022677396) internal successors, (18121), 6835 states have internal predecessors, (18121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:12,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6836 states to 6836 states and 18121 transitions. [2021-06-05 03:51:12,305 INFO L78 Accepts]: Start accepts. Automaton has 6836 states and 18121 transitions. Word has length 47 [2021-06-05 03:51:12,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:12,305 INFO L482 AbstractCegarLoop]: Abstraction has 6836 states and 18121 transitions. [2021-06-05 03:51:12,305 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:12,305 INFO L276 IsEmpty]: Start isEmpty. Operand 6836 states and 18121 transitions. [2021-06-05 03:51:12,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 03:51:12,309 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:12,309 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:12,509 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable500,251 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:12,509 INFO L430 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:12,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:12,510 INFO L82 PathProgramCache]: Analyzing trace with hash -1223920619, now seen corresponding path program 67 times [2021-06-05 03:51:12,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:12,510 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894155222] [2021-06-05 03:51:12,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:12,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:12,580 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 89 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:51:12,580 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:12,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894155222] [2021-06-05 03:51:12,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894155222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:12,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145503961] [2021-06-05 03:51:12,580 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:12,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:12,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 03:51:12,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:51:12,666 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 89 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:51:12,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145503961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:12,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:51:12,667 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 03:51:12,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160941378] [2021-06-05 03:51:12,667 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 03:51:12,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:12,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 03:51:12,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:51:12,667 INFO L87 Difference]: Start difference. First operand 6836 states and 18121 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:13,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:13,014 INFO L93 Difference]: Finished difference Result 8432 states and 21485 transitions. [2021-06-05 03:51:13,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 03:51:13,015 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 03:51:13,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:13,022 INFO L225 Difference]: With dead ends: 8432 [2021-06-05 03:51:13,022 INFO L226 Difference]: Without dead ends: 8418 [2021-06-05 03:51:13,023 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 145.1ms TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-06-05 03:51:13,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8418 states. [2021-06-05 03:51:13,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8418 to 6863. [2021-06-05 03:51:13,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6863 states, 6862 states have (on average 2.652287962693092) internal successors, (18200), 6862 states have internal predecessors, (18200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:13,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6863 states to 6863 states and 18200 transitions. [2021-06-05 03:51:13,096 INFO L78 Accepts]: Start accepts. Automaton has 6863 states and 18200 transitions. Word has length 47 [2021-06-05 03:51:13,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:13,096 INFO L482 AbstractCegarLoop]: Abstraction has 6863 states and 18200 transitions. [2021-06-05 03:51:13,096 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:13,096 INFO L276 IsEmpty]: Start isEmpty. Operand 6863 states and 18200 transitions. [2021-06-05 03:51:13,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 03:51:13,100 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:13,100 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:13,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable501 [2021-06-05 03:51:13,300 INFO L430 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:13,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:13,301 INFO L82 PathProgramCache]: Analyzing trace with hash -1400811563, now seen corresponding path program 135 times [2021-06-05 03:51:13,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:13,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040301433] [2021-06-05 03:51:13,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:13,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:13,379 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 14 proven. 81 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:51:13,379 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:13,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040301433] [2021-06-05 03:51:13,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040301433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:13,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326723700] [2021-06-05 03:51:13,379 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:13,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 03:51:13,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:51:13,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 03:51:13,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:51:13,521 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 11 proven. 84 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:51:13,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326723700] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:13,521 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:51:13,521 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-05 03:51:13,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118341201] [2021-06-05 03:51:13,521 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:51:13,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:13,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:51:13,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:51:13,522 INFO L87 Difference]: Start difference. First operand 6863 states and 18200 transitions. Second operand has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 13 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:13,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:13,798 INFO L93 Difference]: Finished difference Result 6912 states and 18275 transitions. [2021-06-05 03:51:13,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 03:51:13,799 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 13 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 03:51:13,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:13,805 INFO L225 Difference]: With dead ends: 6912 [2021-06-05 03:51:13,805 INFO L226 Difference]: Without dead ends: 6880 [2021-06-05 03:51:13,805 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 99.9ms TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:51:13,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6880 states. [2021-06-05 03:51:13,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6880 to 6863. [2021-06-05 03:51:13,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6863 states, 6862 states have (on average 2.6514135820460507) internal successors, (18194), 6862 states have internal predecessors, (18194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:13,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6863 states to 6863 states and 18194 transitions. [2021-06-05 03:51:13,873 INFO L78 Accepts]: Start accepts. Automaton has 6863 states and 18194 transitions. Word has length 47 [2021-06-05 03:51:13,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:13,873 INFO L482 AbstractCegarLoop]: Abstraction has 6863 states and 18194 transitions. [2021-06-05 03:51:13,873 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 13 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:13,873 INFO L276 IsEmpty]: Start isEmpty. Operand 6863 states and 18194 transitions. [2021-06-05 03:51:13,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 03:51:13,877 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:13,877 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:14,077 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable502 [2021-06-05 03:51:14,077 INFO L430 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:14,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:14,077 INFO L82 PathProgramCache]: Analyzing trace with hash 118327946, now seen corresponding path program 136 times [2021-06-05 03:51:14,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:14,078 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137658528] [2021-06-05 03:51:14,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:14,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:14,131 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 43 proven. 54 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:51:14,131 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:14,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137658528] [2021-06-05 03:51:14,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137658528] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:14,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010409527] [2021-06-05 03:51:14,132 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:14,156 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:51:14,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:51:14,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 03:51:14,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:51:14,241 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 72 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:51:14,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010409527] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:14,241 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:51:14,241 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-06-05 03:51:14,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483780783] [2021-06-05 03:51:14,242 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 03:51:14,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:14,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 03:51:14,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:51:14,242 INFO L87 Difference]: Start difference. First operand 6863 states and 18194 transitions. Second operand has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:14,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:14,430 INFO L93 Difference]: Finished difference Result 8816 states and 22216 transitions. [2021-06-05 03:51:14,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 03:51:14,431 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 03:51:14,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:14,438 INFO L225 Difference]: With dead ends: 8816 [2021-06-05 03:51:14,438 INFO L226 Difference]: Without dead ends: 8816 [2021-06-05 03:51:14,439 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 82.8ms TimeCoverageRelationStatistics Valid=99, Invalid=141, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:51:14,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8816 states. [2021-06-05 03:51:14,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8816 to 7200. [2021-06-05 03:51:14,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7200 states, 7199 states have (on average 2.6677316293929714) internal successors, (19205), 7199 states have internal predecessors, (19205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:14,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7200 states to 7200 states and 19205 transitions. [2021-06-05 03:51:14,522 INFO L78 Accepts]: Start accepts. Automaton has 7200 states and 19205 transitions. Word has length 47 [2021-06-05 03:51:14,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:14,522 INFO L482 AbstractCegarLoop]: Abstraction has 7200 states and 19205 transitions. [2021-06-05 03:51:14,522 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:14,522 INFO L276 IsEmpty]: Start isEmpty. Operand 7200 states and 19205 transitions. [2021-06-05 03:51:14,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 03:51:14,526 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:14,526 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:14,726 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable503,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:14,726 INFO L430 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:14,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:14,726 INFO L82 PathProgramCache]: Analyzing trace with hash -652507721, now seen corresponding path program 68 times [2021-06-05 03:51:14,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:14,726 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595674607] [2021-06-05 03:51:14,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:14,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:14,789 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 89 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:51:14,790 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:14,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595674607] [2021-06-05 03:51:14,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595674607] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:14,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938087009] [2021-06-05 03:51:14,790 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:14,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:51:14,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:51:14,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 03:51:14,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:51:14,878 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 89 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:51:14,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938087009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:14,878 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:51:14,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 03:51:14,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923457832] [2021-06-05 03:51:14,878 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 03:51:14,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:14,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 03:51:14,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-05 03:51:14,879 INFO L87 Difference]: Start difference. First operand 7200 states and 19205 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:15,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:15,211 INFO L93 Difference]: Finished difference Result 8160 states and 21168 transitions. [2021-06-05 03:51:15,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 03:51:15,211 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 03:51:15,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:15,218 INFO L225 Difference]: With dead ends: 8160 [2021-06-05 03:51:15,218 INFO L226 Difference]: Without dead ends: 8160 [2021-06-05 03:51:15,219 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 118.2ms TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:51:15,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8160 states. [2021-06-05 03:51:15,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8160 to 7218. [2021-06-05 03:51:15,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7218 states, 7217 states have (on average 2.668144658445337) internal successors, (19256), 7217 states have internal predecessors, (19256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:15,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7218 states to 7218 states and 19256 transitions. [2021-06-05 03:51:15,296 INFO L78 Accepts]: Start accepts. Automaton has 7218 states and 19256 transitions. Word has length 47 [2021-06-05 03:51:15,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:15,296 INFO L482 AbstractCegarLoop]: Abstraction has 7218 states and 19256 transitions. [2021-06-05 03:51:15,296 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:15,296 INFO L276 IsEmpty]: Start isEmpty. Operand 7218 states and 19256 transitions. [2021-06-05 03:51:15,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 03:51:15,300 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:15,300 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:15,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable506,255 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:15,501 INFO L430 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:15,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:15,501 INFO L82 PathProgramCache]: Analyzing trace with hash 2009163191, now seen corresponding path program 137 times [2021-06-05 03:51:15,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:15,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488310398] [2021-06-05 03:51:15,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:15,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:15,577 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 14 proven. 81 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:51:15,578 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:15,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488310398] [2021-06-05 03:51:15,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488310398] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:15,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567012309] [2021-06-05 03:51:15,578 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:15,610 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 03:51:15,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:51:15,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 03:51:15,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:51:15,704 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 11 proven. 84 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:51:15,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567012309] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:15,705 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:51:15,705 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 03:51:15,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267186987] [2021-06-05 03:51:15,705 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 03:51:15,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:15,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 03:51:15,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:51:15,705 INFO L87 Difference]: Start difference. First operand 7218 states and 19256 transitions. Second operand has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:15,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:15,986 INFO L93 Difference]: Finished difference Result 7286 states and 19355 transitions. [2021-06-05 03:51:15,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 03:51:15,986 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 03:51:15,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:15,992 INFO L225 Difference]: With dead ends: 7286 [2021-06-05 03:51:15,992 INFO L226 Difference]: Without dead ends: 7266 [2021-06-05 03:51:15,992 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 93.8ms TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:51:15,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7266 states. [2021-06-05 03:51:16,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7266 to 7218. [2021-06-05 03:51:16,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7218 states, 7217 states have (on average 2.6677289732575864) internal successors, (19253), 7217 states have internal predecessors, (19253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:16,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7218 states to 7218 states and 19253 transitions. [2021-06-05 03:51:16,064 INFO L78 Accepts]: Start accepts. Automaton has 7218 states and 19253 transitions. Word has length 47 [2021-06-05 03:51:16,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:16,064 INFO L482 AbstractCegarLoop]: Abstraction has 7218 states and 19253 transitions. [2021-06-05 03:51:16,064 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:16,064 INFO L276 IsEmpty]: Start isEmpty. Operand 7218 states and 19253 transitions. [2021-06-05 03:51:16,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 03:51:16,068 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:16,068 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:16,268 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable507,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:16,268 INFO L430 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:16,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:16,269 INFO L82 PathProgramCache]: Analyzing trace with hash -732216406, now seen corresponding path program 69 times [2021-06-05 03:51:16,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:16,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52337913] [2021-06-05 03:51:16,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:16,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:16,328 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 42 proven. 55 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:51:16,328 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:16,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52337913] [2021-06-05 03:51:16,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52337913] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:16,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458709645] [2021-06-05 03:51:16,328 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:16,368 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 03:51:16,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:51:16,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 03:51:16,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:51:16,441 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 43 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:51:16,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458709645] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:16,444 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:51:16,444 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 11 [2021-06-05 03:51:16,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817420329] [2021-06-05 03:51:16,444 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 03:51:16,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:16,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 03:51:16,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:51:16,445 INFO L87 Difference]: Start difference. First operand 7218 states and 19253 transitions. Second operand has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:16,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:16,591 INFO L93 Difference]: Finished difference Result 7894 states and 20581 transitions. [2021-06-05 03:51:16,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 03:51:16,591 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 03:51:16,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:16,599 INFO L225 Difference]: With dead ends: 7894 [2021-06-05 03:51:16,599 INFO L226 Difference]: Without dead ends: 7878 [2021-06-05 03:51:16,599 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 68.1ms TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:51:16,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7878 states. [2021-06-05 03:51:16,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7878 to 7218. [2021-06-05 03:51:16,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7218 states, 7217 states have (on average 2.6667590411528335) internal successors, (19246), 7217 states have internal predecessors, (19246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:16,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7218 states to 7218 states and 19246 transitions. [2021-06-05 03:51:16,674 INFO L78 Accepts]: Start accepts. Automaton has 7218 states and 19246 transitions. Word has length 47 [2021-06-05 03:51:16,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:16,674 INFO L482 AbstractCegarLoop]: Abstraction has 7218 states and 19246 transitions. [2021-06-05 03:51:16,674 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:16,674 INFO L276 IsEmpty]: Start isEmpty. Operand 7218 states and 19246 transitions. [2021-06-05 03:51:16,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 03:51:16,678 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:16,678 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:16,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable508,257 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:16,880 INFO L430 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:16,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:16,880 INFO L82 PathProgramCache]: Analyzing trace with hash 330606421, now seen corresponding path program 70 times [2021-06-05 03:51:16,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:16,880 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204001377] [2021-06-05 03:51:16,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:16,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:16,945 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 89 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:51:16,945 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:16,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204001377] [2021-06-05 03:51:16,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204001377] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:16,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120432170] [2021-06-05 03:51:16,946 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:16,971 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:51:16,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:51:16,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 03:51:16,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:51:17,036 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 89 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:51:17,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120432170] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:17,036 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:51:17,036 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 03:51:17,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699818488] [2021-06-05 03:51:17,036 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 03:51:17,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:17,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 03:51:17,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-05 03:51:17,037 INFO L87 Difference]: Start difference. First operand 7218 states and 19246 transitions. Second operand has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:17,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:17,348 INFO L93 Difference]: Finished difference Result 7863 states and 20502 transitions. [2021-06-05 03:51:17,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 03:51:17,348 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 03:51:17,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:17,355 INFO L225 Difference]: With dead ends: 7863 [2021-06-05 03:51:17,355 INFO L226 Difference]: Without dead ends: 7855 [2021-06-05 03:51:17,355 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 96.5ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:51:17,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7855 states. [2021-06-05 03:51:17,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7855 to 7285. [2021-06-05 03:51:17,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7285 states, 7284 states have (on average 2.6633717737506863) internal successors, (19400), 7284 states have internal predecessors, (19400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:17,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7285 states to 7285 states and 19400 transitions. [2021-06-05 03:51:17,431 INFO L78 Accepts]: Start accepts. Automaton has 7285 states and 19400 transitions. Word has length 47 [2021-06-05 03:51:17,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:17,432 INFO L482 AbstractCegarLoop]: Abstraction has 7285 states and 19400 transitions. [2021-06-05 03:51:17,432 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:17,432 INFO L276 IsEmpty]: Start isEmpty. Operand 7285 states and 19400 transitions. [2021-06-05 03:51:17,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 03:51:17,435 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:17,435 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:17,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 258 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable512 [2021-06-05 03:51:17,636 INFO L430 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:17,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:17,636 INFO L82 PathProgramCache]: Analyzing trace with hash 1830939413, now seen corresponding path program 138 times [2021-06-05 03:51:17,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:17,636 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727090561] [2021-06-05 03:51:17,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:17,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:17,696 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 15 proven. 80 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:51:17,696 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:17,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727090561] [2021-06-05 03:51:17,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727090561] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:17,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673565670] [2021-06-05 03:51:17,697 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:17,723 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 03:51:17,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:51:17,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 03:51:17,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:51:17,827 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 11 proven. 84 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:51:17,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673565670] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:17,827 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:51:17,827 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 03:51:17,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956832430] [2021-06-05 03:51:17,827 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 03:51:17,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:17,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 03:51:17,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-05 03:51:17,827 INFO L87 Difference]: Start difference. First operand 7285 states and 19400 transitions. Second operand has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:18,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:18,202 INFO L93 Difference]: Finished difference Result 7653 states and 20013 transitions. [2021-06-05 03:51:18,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 03:51:18,202 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 03:51:18,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:18,209 INFO L225 Difference]: With dead ends: 7653 [2021-06-05 03:51:18,209 INFO L226 Difference]: Without dead ends: 7538 [2021-06-05 03:51:18,210 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 94.8ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:51:18,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7538 states. [2021-06-05 03:51:18,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7538 to 7173. [2021-06-05 03:51:18,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7173 states, 7172 states have (on average 2.668293363078639) internal successors, (19137), 7172 states have internal predecessors, (19137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:18,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7173 states to 7173 states and 19137 transitions. [2021-06-05 03:51:18,289 INFO L78 Accepts]: Start accepts. Automaton has 7173 states and 19137 transitions. Word has length 47 [2021-06-05 03:51:18,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:18,290 INFO L482 AbstractCegarLoop]: Abstraction has 7173 states and 19137 transitions. [2021-06-05 03:51:18,290 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:18,290 INFO L276 IsEmpty]: Start isEmpty. Operand 7173 states and 19137 transitions. [2021-06-05 03:51:18,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 03:51:18,294 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:18,294 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:18,494 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable513 [2021-06-05 03:51:18,494 INFO L430 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:18,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:18,495 INFO L82 PathProgramCache]: Analyzing trace with hash 1217403233, now seen corresponding path program 139 times [2021-06-05 03:51:18,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:18,495 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228105487] [2021-06-05 03:51:18,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:18,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:18,558 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 81 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:51:18,559 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:18,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228105487] [2021-06-05 03:51:18,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228105487] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:18,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757933116] [2021-06-05 03:51:18,559 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:18,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:18,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 03:51:18,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:51:18,644 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 82 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:51:18,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757933116] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:18,644 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:51:18,645 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 03:51:18,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517810545] [2021-06-05 03:51:18,645 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 03:51:18,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:18,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 03:51:18,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-05 03:51:18,645 INFO L87 Difference]: Start difference. First operand 7173 states and 19137 transitions. Second operand has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:18,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:18,908 INFO L93 Difference]: Finished difference Result 7696 states and 20154 transitions. [2021-06-05 03:51:18,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 03:51:18,909 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 03:51:18,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:18,916 INFO L225 Difference]: With dead ends: 7696 [2021-06-05 03:51:18,916 INFO L226 Difference]: Without dead ends: 7684 [2021-06-05 03:51:18,916 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 94.8ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:51:18,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7684 states. [2021-06-05 03:51:18,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7684 to 7175. [2021-06-05 03:51:18,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7175 states, 7174 states have (on average 2.6681070532478395) internal successors, (19141), 7174 states have internal predecessors, (19141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:18,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7175 states to 7175 states and 19141 transitions. [2021-06-05 03:51:18,994 INFO L78 Accepts]: Start accepts. Automaton has 7175 states and 19141 transitions. Word has length 47 [2021-06-05 03:51:18,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:18,994 INFO L482 AbstractCegarLoop]: Abstraction has 7175 states and 19141 transitions. [2021-06-05 03:51:18,994 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:18,994 INFO L276 IsEmpty]: Start isEmpty. Operand 7175 states and 19141 transitions. [2021-06-05 03:51:18,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 03:51:18,998 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:18,998 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:19,199 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable514,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:19,199 INFO L430 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:19,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:19,199 INFO L82 PathProgramCache]: Analyzing trace with hash -430954270, now seen corresponding path program 140 times [2021-06-05 03:51:19,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:19,199 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861055763] [2021-06-05 03:51:19,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:19,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:19,255 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 40 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:51:19,255 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:19,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861055763] [2021-06-05 03:51:19,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861055763] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:19,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830321197] [2021-06-05 03:51:19,255 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:19,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:51:19,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:51:19,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 03:51:19,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:51:19,341 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 40 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:51:19,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1830321197] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:19,341 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:51:19,341 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 03:51:19,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003578364] [2021-06-05 03:51:19,341 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 03:51:19,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:19,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 03:51:19,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 03:51:19,342 INFO L87 Difference]: Start difference. First operand 7175 states and 19141 transitions. Second operand has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:19,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:19,439 INFO L93 Difference]: Finished difference Result 8501 states and 21546 transitions. [2021-06-05 03:51:19,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 03:51:19,439 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 03:51:19,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:19,446 INFO L225 Difference]: With dead ends: 8501 [2021-06-05 03:51:19,446 INFO L226 Difference]: Without dead ends: 8495 [2021-06-05 03:51:19,447 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 48.0ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-06-05 03:51:19,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8495 states. [2021-06-05 03:51:19,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8495 to 7174. [2021-06-05 03:51:19,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7174 states, 7173 states have (on average 2.6675031367628605) internal successors, (19134), 7173 states have internal predecessors, (19134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:19,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7174 states to 7174 states and 19134 transitions. [2021-06-05 03:51:19,532 INFO L78 Accepts]: Start accepts. Automaton has 7174 states and 19134 transitions. Word has length 47 [2021-06-05 03:51:19,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:19,532 INFO L482 AbstractCegarLoop]: Abstraction has 7174 states and 19134 transitions. [2021-06-05 03:51:19,532 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:19,532 INFO L276 IsEmpty]: Start isEmpty. Operand 7174 states and 19134 transitions. [2021-06-05 03:51:19,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 03:51:19,537 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:19,537 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:19,737 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable515,261 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:19,737 INFO L430 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:19,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:19,737 INFO L82 PathProgramCache]: Analyzing trace with hash -935646729, now seen corresponding path program 141 times [2021-06-05 03:51:19,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:19,738 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364222462] [2021-06-05 03:51:19,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:19,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:19,803 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 82 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:51:19,803 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:19,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364222462] [2021-06-05 03:51:19,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364222462] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:19,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597144904] [2021-06-05 03:51:19,803 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:19,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-05 03:51:19,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:51:19,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 03:51:19,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:51:19,892 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 83 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:51:19,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597144904] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:19,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:51:19,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 03:51:19,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634769372] [2021-06-05 03:51:19,892 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 03:51:19,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:19,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 03:51:19,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-05 03:51:19,892 INFO L87 Difference]: Start difference. First operand 7174 states and 19134 transitions. Second operand has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:20,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:20,324 INFO L93 Difference]: Finished difference Result 8738 states and 22335 transitions. [2021-06-05 03:51:20,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 03:51:20,325 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 03:51:20,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:20,333 INFO L225 Difference]: With dead ends: 8738 [2021-06-05 03:51:20,333 INFO L226 Difference]: Without dead ends: 8684 [2021-06-05 03:51:20,333 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 183.8ms TimeCoverageRelationStatistics Valid=105, Invalid=597, Unknown=0, NotChecked=0, Total=702 [2021-06-05 03:51:20,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8684 states. [2021-06-05 03:51:20,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8684 to 7281. [2021-06-05 03:51:20,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7281 states, 7280 states have (on average 2.6664835164835163) internal successors, (19412), 7280 states have internal predecessors, (19412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:20,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7281 states to 7281 states and 19412 transitions. [2021-06-05 03:51:20,435 INFO L78 Accepts]: Start accepts. Automaton has 7281 states and 19412 transitions. Word has length 47 [2021-06-05 03:51:20,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:20,435 INFO L482 AbstractCegarLoop]: Abstraction has 7281 states and 19412 transitions. [2021-06-05 03:51:20,435 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:20,435 INFO L276 IsEmpty]: Start isEmpty. Operand 7281 states and 19412 transitions. [2021-06-05 03:51:20,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 03:51:20,439 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:20,439 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:20,639 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable518,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:20,640 INFO L430 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:20,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:20,640 INFO L82 PathProgramCache]: Analyzing trace with hash 596912380, now seen corresponding path program 142 times [2021-06-05 03:51:20,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:20,640 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267746244] [2021-06-05 03:51:20,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:20,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:20,698 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:51:20,698 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:20,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267746244] [2021-06-05 03:51:20,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267746244] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:20,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298133492] [2021-06-05 03:51:20,698 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:20,723 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:51:20,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:51:20,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 03:51:20,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:51:20,787 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:51:20,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298133492] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:20,788 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:51:20,788 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 03:51:20,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052248259] [2021-06-05 03:51:20,788 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 03:51:20,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:20,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 03:51:20,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-06-05 03:51:20,788 INFO L87 Difference]: Start difference. First operand 7281 states and 19412 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:20,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:20,913 INFO L93 Difference]: Finished difference Result 8660 states and 21915 transitions. [2021-06-05 03:51:20,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 03:51:20,914 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 03:51:20,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:20,923 INFO L225 Difference]: With dead ends: 8660 [2021-06-05 03:51:20,923 INFO L226 Difference]: Without dead ends: 8642 [2021-06-05 03:51:20,923 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 63.0ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:51:20,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8642 states. [2021-06-05 03:51:21,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8642 to 7281. [2021-06-05 03:51:21,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7281 states, 7280 states have (on average 2.665521978021978) internal successors, (19405), 7280 states have internal predecessors, (19405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:21,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7281 states to 7281 states and 19405 transitions. [2021-06-05 03:51:21,023 INFO L78 Accepts]: Start accepts. Automaton has 7281 states and 19405 transitions. Word has length 47 [2021-06-05 03:51:21,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:21,023 INFO L482 AbstractCegarLoop]: Abstraction has 7281 states and 19405 transitions. [2021-06-05 03:51:21,023 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:21,023 INFO L276 IsEmpty]: Start isEmpty. Operand 7281 states and 19405 transitions. [2021-06-05 03:51:21,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 03:51:21,027 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:21,027 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:21,227 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable519,263 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:21,227 INFO L430 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:21,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:21,227 INFO L82 PathProgramCache]: Analyzing trace with hash -780810195, now seen corresponding path program 143 times [2021-06-05 03:51:21,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:21,228 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907506783] [2021-06-05 03:51:21,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:21,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:21,297 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 82 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:51:21,298 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:21,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907506783] [2021-06-05 03:51:21,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907506783] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:21,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079864441] [2021-06-05 03:51:21,298 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:21,325 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-05 03:51:21,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:51:21,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 03:51:21,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:51:21,387 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 83 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:51:21,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079864441] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:21,388 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:51:21,388 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 03:51:21,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644541787] [2021-06-05 03:51:21,388 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 03:51:21,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:21,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 03:51:21,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:51:21,388 INFO L87 Difference]: Start difference. First operand 7281 states and 19405 transitions. Second operand has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:22,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:22,117 INFO L93 Difference]: Finished difference Result 11178 states and 27510 transitions. [2021-06-05 03:51:22,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 03:51:22,118 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 03:51:22,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:22,128 INFO L225 Difference]: With dead ends: 11178 [2021-06-05 03:51:22,128 INFO L226 Difference]: Without dead ends: 11010 [2021-06-05 03:51:22,129 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 370.0ms TimeCoverageRelationStatistics Valid=267, Invalid=1895, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 03:51:22,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11010 states. [2021-06-05 03:51:22,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11010 to 7582. [2021-06-05 03:51:22,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7582 states, 7581 states have (on average 2.6559820604141935) internal successors, (20135), 7581 states have internal predecessors, (20135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:22,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7582 states to 7582 states and 20135 transitions. [2021-06-05 03:51:22,226 INFO L78 Accepts]: Start accepts. Automaton has 7582 states and 20135 transitions. Word has length 47 [2021-06-05 03:51:22,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:22,226 INFO L482 AbstractCegarLoop]: Abstraction has 7582 states and 20135 transitions. [2021-06-05 03:51:22,226 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:22,227 INFO L276 IsEmpty]: Start isEmpty. Operand 7582 states and 20135 transitions. [2021-06-05 03:51:22,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 03:51:22,230 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:22,230 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:22,431 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable523 [2021-06-05 03:51:22,431 INFO L430 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:22,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:22,431 INFO L82 PathProgramCache]: Analyzing trace with hash -394207518, now seen corresponding path program 144 times [2021-06-05 03:51:22,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:22,431 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078123210] [2021-06-05 03:51:22,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:22,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:22,498 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 31 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:51:22,498 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:22,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078123210] [2021-06-05 03:51:22,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078123210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:22,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15789141] [2021-06-05 03:51:22,498 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:22,525 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 03:51:22,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:51:22,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 03:51:22,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:51:22,591 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 31 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:51:22,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15789141] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:22,591 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:51:22,591 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 03:51:22,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238579785] [2021-06-05 03:51:22,591 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 03:51:22,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:22,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 03:51:22,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:51:22,592 INFO L87 Difference]: Start difference. First operand 7582 states and 20135 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:22,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:22,748 INFO L93 Difference]: Finished difference Result 9069 states and 22840 transitions. [2021-06-05 03:51:22,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 03:51:22,748 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 03:51:22,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:22,756 INFO L225 Difference]: With dead ends: 9069 [2021-06-05 03:51:22,756 INFO L226 Difference]: Without dead ends: 9042 [2021-06-05 03:51:22,756 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 80.0ms TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:51:22,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9042 states. [2021-06-05 03:51:22,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9042 to 7582. [2021-06-05 03:51:22,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7582 states, 7581 states have (on average 2.6555863342566943) internal successors, (20132), 7581 states have internal predecessors, (20132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:22,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7582 states to 7582 states and 20132 transitions. [2021-06-05 03:51:22,879 INFO L78 Accepts]: Start accepts. Automaton has 7582 states and 20132 transitions. Word has length 47 [2021-06-05 03:51:22,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:22,879 INFO L482 AbstractCegarLoop]: Abstraction has 7582 states and 20132 transitions. [2021-06-05 03:51:22,879 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:22,879 INFO L276 IsEmpty]: Start isEmpty. Operand 7582 states and 20132 transitions. [2021-06-05 03:51:22,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 03:51:22,883 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:22,883 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:23,083 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 265 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable524 [2021-06-05 03:51:23,083 INFO L430 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:23,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:23,085 INFO L82 PathProgramCache]: Analyzing trace with hash -840501705, now seen corresponding path program 145 times [2021-06-05 03:51:23,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:23,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133969667] [2021-06-05 03:51:23,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:23,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:23,165 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 82 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:51:23,165 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:23,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133969667] [2021-06-05 03:51:23,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133969667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:23,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189628839] [2021-06-05 03:51:23,165 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:23,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:23,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 03:51:23,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:51:23,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 03:51:23,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2021-06-05 03:51:23,293 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 03:51:23,295 INFO L628 ElimStorePlain]: treesize reduction 20, result has 4.8 percent of original size [2021-06-05 03:51:23,295 INFO L518 ElimStorePlain]: Eliminatee B vanished before elimination [2021-06-05 03:51:23,295 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 03:51:23,295 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:1 [2021-06-05 03:51:23,301 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 16 proven. 79 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:51:23,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189628839] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:23,301 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:51:23,301 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 03:51:23,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324990687] [2021-06-05 03:51:23,302 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 03:51:23,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:23,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 03:51:23,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:51:23,302 INFO L87 Difference]: Start difference. First operand 7582 states and 20132 transitions. Second operand has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:24,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:24,562 INFO L93 Difference]: Finished difference Result 16993 states and 39932 transitions. [2021-06-05 03:51:24,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-06-05 03:51:24,562 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 03:51:24,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:24,579 INFO L225 Difference]: With dead ends: 16993 [2021-06-05 03:51:24,579 INFO L226 Difference]: Without dead ends: 16471 [2021-06-05 03:51:24,580 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2193 ImplicationChecksByTransitivity, 748.2ms TimeCoverageRelationStatistics Valid=645, Invalid=5517, Unknown=0, NotChecked=0, Total=6162 [2021-06-05 03:51:24,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16471 states. [2021-06-05 03:51:24,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16471 to 8142. [2021-06-05 03:51:24,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8142 states, 8141 states have (on average 2.6381279941039186) internal successors, (21477), 8141 states have internal predecessors, (21477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:24,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8142 states to 8142 states and 21477 transitions. [2021-06-05 03:51:24,719 INFO L78 Accepts]: Start accepts. Automaton has 8142 states and 21477 transitions. Word has length 47 [2021-06-05 03:51:24,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:24,719 INFO L482 AbstractCegarLoop]: Abstraction has 8142 states and 21477 transitions. [2021-06-05 03:51:24,719 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:24,719 INFO L276 IsEmpty]: Start isEmpty. Operand 8142 states and 21477 transitions. [2021-06-05 03:51:24,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 03:51:24,724 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:24,724 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:24,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable529 [2021-06-05 03:51:24,924 INFO L430 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:24,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:24,924 INFO L82 PathProgramCache]: Analyzing trace with hash 1053071164, now seen corresponding path program 146 times [2021-06-05 03:51:24,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:24,924 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756350533] [2021-06-05 03:51:24,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:24,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:25,000 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 32 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:51:25,000 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:25,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756350533] [2021-06-05 03:51:25,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756350533] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:25,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820861780] [2021-06-05 03:51:25,000 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:25,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:51:25,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:51:25,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 03:51:25,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:51:25,089 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 32 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:51:25,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820861780] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:25,089 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:51:25,089 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-06-05 03:51:25,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6322505] [2021-06-05 03:51:25,089 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 03:51:25,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:25,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 03:51:25,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:51:25,090 INFO L87 Difference]: Start difference. First operand 8142 states and 21477 transitions. Second operand has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:25,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:25,267 INFO L93 Difference]: Finished difference Result 9828 states and 24560 transitions. [2021-06-05 03:51:25,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 03:51:25,268 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 03:51:25,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:25,277 INFO L225 Difference]: With dead ends: 9828 [2021-06-05 03:51:25,277 INFO L226 Difference]: Without dead ends: 9792 [2021-06-05 03:51:25,277 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 96.7ms TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:51:25,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9792 states. [2021-06-05 03:51:25,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9792 to 8142. [2021-06-05 03:51:25,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8142 states, 8141 states have (on average 2.637759489006265) internal successors, (21474), 8141 states have internal predecessors, (21474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:25,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8142 states to 8142 states and 21474 transitions. [2021-06-05 03:51:25,374 INFO L78 Accepts]: Start accepts. Automaton has 8142 states and 21474 transitions. Word has length 47 [2021-06-05 03:51:25,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:25,374 INFO L482 AbstractCegarLoop]: Abstraction has 8142 states and 21474 transitions. [2021-06-05 03:51:25,374 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:25,374 INFO L276 IsEmpty]: Start isEmpty. Operand 8142 states and 21474 transitions. [2021-06-05 03:51:25,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 03:51:25,378 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:25,378 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:25,578 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 267 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable530 [2021-06-05 03:51:25,579 INFO L430 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:25,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:25,579 INFO L82 PathProgramCache]: Analyzing trace with hash -993815571, now seen corresponding path program 147 times [2021-06-05 03:51:25,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:25,579 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845797851] [2021-06-05 03:51:25,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:25,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:25,714 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 82 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:51:25,714 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:25,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845797851] [2021-06-05 03:51:25,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845797851] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:25,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530266774] [2021-06-05 03:51:25,714 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:25,741 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-05 03:51:25,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:51:25,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 03:51:25,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:51:25,803 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 83 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:51:25,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530266774] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:25,803 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:51:25,803 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 03:51:25,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763529777] [2021-06-05 03:51:25,804 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:51:25,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:25,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:51:25,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:51:25,804 INFO L87 Difference]: Start difference. First operand 8142 states and 21474 transitions. Second operand has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:27,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:27,685 INFO L93 Difference]: Finished difference Result 19383 states and 45637 transitions. [2021-06-05 03:51:27,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2021-06-05 03:51:27,685 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 03:51:27,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:27,705 INFO L225 Difference]: With dead ends: 19383 [2021-06-05 03:51:27,705 INFO L226 Difference]: Without dead ends: 18765 [2021-06-05 03:51:27,707 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6450 ImplicationChecksByTransitivity, 1442.7ms TimeCoverageRelationStatistics Valid=1455, Invalid=14547, Unknown=0, NotChecked=0, Total=16002 [2021-06-05 03:51:27,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18765 states. [2021-06-05 03:51:27,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18765 to 8971. [2021-06-05 03:51:27,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8971 states, 8970 states have (on average 2.618283166109253) internal successors, (23486), 8970 states have internal predecessors, (23486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:27,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8971 states to 8971 states and 23486 transitions. [2021-06-05 03:51:27,856 INFO L78 Accepts]: Start accepts. Automaton has 8971 states and 23486 transitions. Word has length 47 [2021-06-05 03:51:27,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:27,856 INFO L482 AbstractCegarLoop]: Abstraction has 8971 states and 23486 transitions. [2021-06-05 03:51:27,856 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:27,856 INFO L276 IsEmpty]: Start isEmpty. Operand 8971 states and 23486 transitions. [2021-06-05 03:51:27,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 03:51:27,860 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:27,861 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:28,061 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 268 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable536 [2021-06-05 03:51:28,061 INFO L430 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:28,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:28,061 INFO L82 PathProgramCache]: Analyzing trace with hash -244397918, now seen corresponding path program 148 times [2021-06-05 03:51:28,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:28,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405956675] [2021-06-05 03:51:28,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:28,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:28,147 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 39 proven. 59 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:51:28,147 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:28,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405956675] [2021-06-05 03:51:28,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405956675] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:28,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933242943] [2021-06-05 03:51:28,147 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:28,172 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:51:28,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:51:28,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 03:51:28,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:51:28,240 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 39 proven. 59 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:51:28,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933242943] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:28,241 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:51:28,241 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-06-05 03:51:28,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322483564] [2021-06-05 03:51:28,241 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:51:28,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:28,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:51:28,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:51:28,241 INFO L87 Difference]: Start difference. First operand 8971 states and 23486 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:28,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:28,447 INFO L93 Difference]: Finished difference Result 11009 states and 27233 transitions. [2021-06-05 03:51:28,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 03:51:28,447 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 03:51:28,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:28,457 INFO L225 Difference]: With dead ends: 11009 [2021-06-05 03:51:28,457 INFO L226 Difference]: Without dead ends: 10964 [2021-06-05 03:51:28,457 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 115.2ms TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:51:28,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10964 states. [2021-06-05 03:51:28,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10964 to 8971. [2021-06-05 03:51:28,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8971 states, 8970 states have (on average 2.617948717948718) internal successors, (23483), 8970 states have internal predecessors, (23483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:28,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8971 states to 8971 states and 23483 transitions. [2021-06-05 03:51:28,563 INFO L78 Accepts]: Start accepts. Automaton has 8971 states and 23483 transitions. Word has length 47 [2021-06-05 03:51:28,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:28,563 INFO L482 AbstractCegarLoop]: Abstraction has 8971 states and 23483 transitions. [2021-06-05 03:51:28,563 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:28,564 INFO L276 IsEmpty]: Start isEmpty. Operand 8971 states and 23483 transitions. [2021-06-05 03:51:28,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 03:51:28,568 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:28,568 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:28,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable537 [2021-06-05 03:51:28,773 INFO L430 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:28,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:28,773 INFO L82 PathProgramCache]: Analyzing trace with hash 1478005367, now seen corresponding path program 149 times [2021-06-05 03:51:28,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:28,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446270638] [2021-06-05 03:51:28,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:28,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:28,881 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:28,881 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:28,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446270638] [2021-06-05 03:51:28,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446270638] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:28,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946230493] [2021-06-05 03:51:28,882 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:28,925 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-05 03:51:28,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:51:28,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 03:51:28,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:51:28,987 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:28,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946230493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:28,988 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:51:28,988 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 03:51:28,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620262948] [2021-06-05 03:51:28,988 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 03:51:28,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:28,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 03:51:28,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:51:28,988 INFO L87 Difference]: Start difference. First operand 8971 states and 23483 transitions. Second operand has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:29,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:29,491 INFO L93 Difference]: Finished difference Result 11682 states and 28568 transitions. [2021-06-05 03:51:29,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 03:51:29,491 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 03:51:29,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:29,501 INFO L225 Difference]: With dead ends: 11682 [2021-06-05 03:51:29,501 INFO L226 Difference]: Without dead ends: 10842 [2021-06-05 03:51:29,502 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 276.9ms TimeCoverageRelationStatistics Valid=169, Invalid=761, Unknown=0, NotChecked=0, Total=930 [2021-06-05 03:51:29,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10842 states. [2021-06-05 03:51:29,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10842 to 6870. [2021-06-05 03:51:29,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6870 states, 6869 states have (on average 2.6869995632552044) internal successors, (18457), 6869 states have internal predecessors, (18457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:29,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6870 states to 6870 states and 18457 transitions. [2021-06-05 03:51:29,591 INFO L78 Accepts]: Start accepts. Automaton has 6870 states and 18457 transitions. Word has length 47 [2021-06-05 03:51:29,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:29,591 INFO L482 AbstractCegarLoop]: Abstraction has 6870 states and 18457 transitions. [2021-06-05 03:51:29,591 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:29,591 INFO L276 IsEmpty]: Start isEmpty. Operand 6870 states and 18457 transitions. [2021-06-05 03:51:29,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 03:51:29,595 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:29,595 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:29,795 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable544,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:29,795 INFO L430 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:29,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:29,795 INFO L82 PathProgramCache]: Analyzing trace with hash 1239943850, now seen corresponding path program 71 times [2021-06-05 03:51:29,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:29,795 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760190408] [2021-06-05 03:51:29,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:29,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:29,848 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 67 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:29,848 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:29,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760190408] [2021-06-05 03:51:29,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760190408] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:29,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414516076] [2021-06-05 03:51:29,848 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:29,876 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-05 03:51:29,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:51:29,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 03:51:29,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:51:29,967 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 67 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:29,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414516076] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:29,967 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:51:29,967 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 16 [2021-06-05 03:51:29,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234560835] [2021-06-05 03:51:29,968 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 03:51:29,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:29,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 03:51:29,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=171, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:51:29,968 INFO L87 Difference]: Start difference. First operand 6870 states and 18457 transitions. Second operand has 17 states, 17 states have (on average 4.411764705882353) internal successors, (75), 16 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:30,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:30,221 INFO L93 Difference]: Finished difference Result 8334 states and 21563 transitions. [2021-06-05 03:51:30,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 03:51:30,222 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.411764705882353) internal successors, (75), 16 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 03:51:30,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:30,230 INFO L225 Difference]: With dead ends: 8334 [2021-06-05 03:51:30,230 INFO L226 Difference]: Without dead ends: 8318 [2021-06-05 03:51:30,230 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 92.0ms TimeCoverageRelationStatistics Valid=118, Invalid=224, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:51:30,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8318 states. [2021-06-05 03:51:30,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8318 to 7293. [2021-06-05 03:51:30,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7293 states, 7292 states have (on average 2.686368623148656) internal successors, (19589), 7292 states have internal predecessors, (19589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:30,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7293 states to 7293 states and 19589 transitions. [2021-06-05 03:51:30,314 INFO L78 Accepts]: Start accepts. Automaton has 7293 states and 19589 transitions. Word has length 47 [2021-06-05 03:51:30,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:30,314 INFO L482 AbstractCegarLoop]: Abstraction has 7293 states and 19589 transitions. [2021-06-05 03:51:30,314 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.411764705882353) internal successors, (75), 16 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:30,315 INFO L276 IsEmpty]: Start isEmpty. Operand 7293 states and 19589 transitions. [2021-06-05 03:51:30,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 03:51:30,318 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:30,318 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:30,519 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 271 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable545 [2021-06-05 03:51:30,519 INFO L430 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:30,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:30,519 INFO L82 PathProgramCache]: Analyzing trace with hash 618063440, now seen corresponding path program 72 times [2021-06-05 03:51:30,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:30,519 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233929502] [2021-06-05 03:51:30,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:30,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:30,573 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 67 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:51:30,573 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:30,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233929502] [2021-06-05 03:51:30,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233929502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:30,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635618668] [2021-06-05 03:51:30,573 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:30,600 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-05 03:51:30,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:51:30,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 03:51:30,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:51:30,665 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 67 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:51:30,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635618668] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:30,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:51:30,666 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 10 [2021-06-05 03:51:30,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709958918] [2021-06-05 03:51:30,666 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 03:51:30,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:30,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 03:51:30,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-06-05 03:51:30,666 INFO L87 Difference]: Start difference. First operand 7293 states and 19589 transitions. Second operand has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:30,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:30,883 INFO L93 Difference]: Finished difference Result 8900 states and 22808 transitions. [2021-06-05 03:51:30,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 03:51:30,883 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 03:51:30,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:30,891 INFO L225 Difference]: With dead ends: 8900 [2021-06-05 03:51:30,892 INFO L226 Difference]: Without dead ends: 8900 [2021-06-05 03:51:30,892 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 91.1ms TimeCoverageRelationStatistics Valid=113, Invalid=159, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:51:30,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8900 states. [2021-06-05 03:51:30,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8900 to 7296. [2021-06-05 03:51:30,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7296 states, 7295 states have (on average 2.6864976010966415) internal successors, (19598), 7295 states have internal predecessors, (19598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:30,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7296 states to 7296 states and 19598 transitions. [2021-06-05 03:51:30,996 INFO L78 Accepts]: Start accepts. Automaton has 7296 states and 19598 transitions. Word has length 47 [2021-06-05 03:51:30,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:30,996 INFO L482 AbstractCegarLoop]: Abstraction has 7296 states and 19598 transitions. [2021-06-05 03:51:30,996 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:30,997 INFO L276 IsEmpty]: Start isEmpty. Operand 7296 states and 19598 transitions. [2021-06-05 03:51:31,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 03:51:31,000 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:31,000 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:31,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable547,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:31,201 INFO L430 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:31,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:31,201 INFO L82 PathProgramCache]: Analyzing trace with hash -1019509016, now seen corresponding path program 73 times [2021-06-05 03:51:31,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:31,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784158199] [2021-06-05 03:51:31,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:31,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:31,262 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 68 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:51:31,263 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:31,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784158199] [2021-06-05 03:51:31,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784158199] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:31,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463525905] [2021-06-05 03:51:31,263 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:31,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:31,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 03:51:31,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:51:31,374 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 69 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:51:31,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463525905] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:31,374 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:51:31,374 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 13 [2021-06-05 03:51:31,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987553498] [2021-06-05 03:51:31,374 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:51:31,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:31,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:51:31,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:51:31,375 INFO L87 Difference]: Start difference. First operand 7296 states and 19598 transitions. Second operand has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 13 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:31,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:31,765 INFO L93 Difference]: Finished difference Result 8356 states and 21589 transitions. [2021-06-05 03:51:31,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 03:51:31,765 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 13 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 03:51:31,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:31,773 INFO L225 Difference]: With dead ends: 8356 [2021-06-05 03:51:31,774 INFO L226 Difference]: Without dead ends: 8356 [2021-06-05 03:51:31,774 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 191.0ms TimeCoverageRelationStatistics Valid=246, Invalid=404, Unknown=0, NotChecked=0, Total=650 [2021-06-05 03:51:31,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8356 states. [2021-06-05 03:51:31,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8356 to 7143. [2021-06-05 03:51:31,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7143 states, 7142 states have (on average 2.690422850742089) internal successors, (19215), 7142 states have internal predecessors, (19215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:31,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7143 states to 7143 states and 19215 transitions. [2021-06-05 03:51:31,859 INFO L78 Accepts]: Start accepts. Automaton has 7143 states and 19215 transitions. Word has length 47 [2021-06-05 03:51:31,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:31,859 INFO L482 AbstractCegarLoop]: Abstraction has 7143 states and 19215 transitions. [2021-06-05 03:51:31,859 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 13 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:31,859 INFO L276 IsEmpty]: Start isEmpty. Operand 7143 states and 19215 transitions. [2021-06-05 03:51:31,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 03:51:31,863 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:31,863 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:32,063 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable548,273 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:32,063 INFO L430 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:32,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:32,063 INFO L82 PathProgramCache]: Analyzing trace with hash 1559844220, now seen corresponding path program 150 times [2021-06-05 03:51:32,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:32,064 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604514833] [2021-06-05 03:51:32,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:32,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:32,159 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 53 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:32,159 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:32,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604514833] [2021-06-05 03:51:32,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604514833] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:32,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104758594] [2021-06-05 03:51:32,159 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:32,185 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 03:51:32,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:51:32,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 03:51:32,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:51:32,254 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 53 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:32,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104758594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:32,255 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:51:32,255 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-06-05 03:51:32,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619713193] [2021-06-05 03:51:32,255 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 03:51:32,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:32,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 03:51:32,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:51:32,255 INFO L87 Difference]: Start difference. First operand 7143 states and 19215 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:32,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:32,461 INFO L93 Difference]: Finished difference Result 8410 states and 21506 transitions. [2021-06-05 03:51:32,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 03:51:32,461 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 03:51:32,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:32,469 INFO L225 Difference]: With dead ends: 8410 [2021-06-05 03:51:32,469 INFO L226 Difference]: Without dead ends: 8354 [2021-06-05 03:51:32,469 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 136.4ms TimeCoverageRelationStatistics Valid=132, Invalid=288, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:51:32,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8354 states. [2021-06-05 03:51:32,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8354 to 7152. [2021-06-05 03:51:32,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7152 states, 7151 states have (on average 2.6889945462173124) internal successors, (19229), 7151 states have internal predecessors, (19229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:32,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7152 states to 7152 states and 19229 transitions. [2021-06-05 03:51:32,551 INFO L78 Accepts]: Start accepts. Automaton has 7152 states and 19229 transitions. Word has length 47 [2021-06-05 03:51:32,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:32,551 INFO L482 AbstractCegarLoop]: Abstraction has 7152 states and 19229 transitions. [2021-06-05 03:51:32,551 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:32,551 INFO L276 IsEmpty]: Start isEmpty. Operand 7152 states and 19229 transitions. [2021-06-05 03:51:32,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-05 03:51:32,555 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:32,555 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:32,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable551,274 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:32,756 INFO L430 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:32,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:32,756 INFO L82 PathProgramCache]: Analyzing trace with hash -2086787547, now seen corresponding path program 151 times [2021-06-05 03:51:32,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:32,756 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869267778] [2021-06-05 03:51:32,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:32,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:32,813 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 113 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:51:32,813 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:32,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869267778] [2021-06-05 03:51:32,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869267778] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:32,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818584901] [2021-06-05 03:51:32,813 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:32,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:32,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 03:51:32,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:51:33,092 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 51 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:33,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818584901] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:33,092 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:51:33,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 15] total 22 [2021-06-05 03:51:33,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149931717] [2021-06-05 03:51:33,093 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 03:51:33,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:33,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 03:51:33,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-06-05 03:51:33,093 INFO L87 Difference]: Start difference. First operand 7152 states and 19229 transitions. Second operand has 23 states, 23 states have (on average 4.304347826086956) internal successors, (99), 22 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:34,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:34,198 INFO L93 Difference]: Finished difference Result 9713 states and 24252 transitions. [2021-06-05 03:51:34,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 03:51:34,198 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.304347826086956) internal successors, (99), 22 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-06-05 03:51:34,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:34,207 INFO L225 Difference]: With dead ends: 9713 [2021-06-05 03:51:34,207 INFO L226 Difference]: Without dead ends: 9671 [2021-06-05 03:51:34,208 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 684 ImplicationChecksByTransitivity, 614.3ms TimeCoverageRelationStatistics Valid=620, Invalid=2460, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 03:51:34,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9671 states. [2021-06-05 03:51:34,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9671 to 7802. [2021-06-05 03:51:34,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7802 states, 7801 states have (on average 2.6345340340981926) internal successors, (20552), 7801 states have internal predecessors, (20552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:34,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7802 states to 7802 states and 20552 transitions. [2021-06-05 03:51:34,300 INFO L78 Accepts]: Start accepts. Automaton has 7802 states and 20552 transitions. Word has length 50 [2021-06-05 03:51:34,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:34,300 INFO L482 AbstractCegarLoop]: Abstraction has 7802 states and 20552 transitions. [2021-06-05 03:51:34,300 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.304347826086956) internal successors, (99), 22 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:34,300 INFO L276 IsEmpty]: Start isEmpty. Operand 7802 states and 20552 transitions. [2021-06-05 03:51:34,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-05 03:51:34,304 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:34,304 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:34,505 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable559,275 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:34,505 INFO L430 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:34,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:34,505 INFO L82 PathProgramCache]: Analyzing trace with hash -1860539001, now seen corresponding path program 152 times [2021-06-05 03:51:34,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:34,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962127008] [2021-06-05 03:51:34,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:34,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:34,555 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 03:51:34,555 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:34,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962127008] [2021-06-05 03:51:34,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962127008] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:34,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047790008] [2021-06-05 03:51:34,556 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:34,581 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:51:34,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:51:34,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 03:51:34,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:51:34,639 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 03:51:34,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047790008] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:34,639 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:51:34,639 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-05 03:51:34,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256011813] [2021-06-05 03:51:34,639 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 03:51:34,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:34,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 03:51:34,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-06-05 03:51:34,640 INFO L87 Difference]: Start difference. First operand 7802 states and 20552 transitions. Second operand has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:34,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:34,873 INFO L93 Difference]: Finished difference Result 8830 states and 22462 transitions. [2021-06-05 03:51:34,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 03:51:34,874 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-06-05 03:51:34,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:34,882 INFO L225 Difference]: With dead ends: 8830 [2021-06-05 03:51:34,882 INFO L226 Difference]: Without dead ends: 8773 [2021-06-05 03:51:34,882 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 40.4ms TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-06-05 03:51:34,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8773 states. [2021-06-05 03:51:34,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8773 to 7820. [2021-06-05 03:51:34,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7820 states, 7819 states have (on average 2.632945389435989) internal successors, (20587), 7819 states have internal predecessors, (20587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:34,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7820 states to 7820 states and 20587 transitions. [2021-06-05 03:51:34,971 INFO L78 Accepts]: Start accepts. Automaton has 7820 states and 20587 transitions. Word has length 50 [2021-06-05 03:51:34,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:34,971 INFO L482 AbstractCegarLoop]: Abstraction has 7820 states and 20587 transitions. [2021-06-05 03:51:34,971 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:34,972 INFO L276 IsEmpty]: Start isEmpty. Operand 7820 states and 20587 transitions. [2021-06-05 03:51:34,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-05 03:51:34,976 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:34,976 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:35,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable560,276 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:35,177 INFO L430 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:35,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:35,177 INFO L82 PathProgramCache]: Analyzing trace with hash 1761499875, now seen corresponding path program 153 times [2021-06-05 03:51:35,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:35,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353057345] [2021-06-05 03:51:35,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:35,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:35,227 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 03:51:35,227 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:35,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353057345] [2021-06-05 03:51:35,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353057345] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:35,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146992302] [2021-06-05 03:51:35,227 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:35,255 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-06-05 03:51:35,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:51:35,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 03:51:35,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:51:35,313 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 03:51:35,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146992302] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:35,314 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:51:35,314 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-05 03:51:35,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897355658] [2021-06-05 03:51:35,314 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 03:51:35,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:35,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 03:51:35,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-06-05 03:51:35,314 INFO L87 Difference]: Start difference. First operand 7820 states and 20587 transitions. Second operand has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:35,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:35,550 INFO L93 Difference]: Finished difference Result 8754 states and 22356 transitions. [2021-06-05 03:51:35,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 03:51:35,550 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-06-05 03:51:35,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:35,558 INFO L225 Difference]: With dead ends: 8754 [2021-06-05 03:51:35,558 INFO L226 Difference]: Without dead ends: 8694 [2021-06-05 03:51:35,559 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 40.4ms TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-06-05 03:51:35,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8694 states. [2021-06-05 03:51:35,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8694 to 7865. [2021-06-05 03:51:35,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7865 states, 7864 states have (on average 2.6280518819938963) internal successors, (20667), 7864 states have internal predecessors, (20667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:35,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7865 states to 7865 states and 20667 transitions. [2021-06-05 03:51:35,645 INFO L78 Accepts]: Start accepts. Automaton has 7865 states and 20667 transitions. Word has length 50 [2021-06-05 03:51:35,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:35,645 INFO L482 AbstractCegarLoop]: Abstraction has 7865 states and 20667 transitions. [2021-06-05 03:51:35,645 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:35,645 INFO L276 IsEmpty]: Start isEmpty. Operand 7865 states and 20667 transitions. [2021-06-05 03:51:35,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-05 03:51:35,650 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:35,650 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:35,850 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable561,277 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:35,850 INFO L430 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:35,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:35,850 INFO L82 PathProgramCache]: Analyzing trace with hash -836689913, now seen corresponding path program 154 times [2021-06-05 03:51:35,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:35,850 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905308408] [2021-06-05 03:51:35,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:35,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:35,901 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 03:51:35,901 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:35,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905308408] [2021-06-05 03:51:35,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905308408] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:35,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448803563] [2021-06-05 03:51:35,901 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:35,926 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:51:35,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:51:35,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 03:51:35,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:51:35,985 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 03:51:35,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448803563] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:35,985 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:51:35,985 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-05 03:51:35,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90555016] [2021-06-05 03:51:35,986 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 03:51:35,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:35,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 03:51:35,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-06-05 03:51:35,986 INFO L87 Difference]: Start difference. First operand 7865 states and 20667 transitions. Second operand has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:36,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:36,221 INFO L93 Difference]: Finished difference Result 8782 states and 22434 transitions. [2021-06-05 03:51:36,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 03:51:36,221 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-06-05 03:51:36,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:36,230 INFO L225 Difference]: With dead ends: 8782 [2021-06-05 03:51:36,230 INFO L226 Difference]: Without dead ends: 8744 [2021-06-05 03:51:36,230 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 40.7ms TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-06-05 03:51:36,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8744 states. [2021-06-05 03:51:36,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8744 to 7937. [2021-06-05 03:51:36,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7937 states, 7936 states have (on average 2.62109375) internal successors, (20801), 7936 states have internal predecessors, (20801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:36,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7937 states to 7937 states and 20801 transitions. [2021-06-05 03:51:36,335 INFO L78 Accepts]: Start accepts. Automaton has 7937 states and 20801 transitions. Word has length 50 [2021-06-05 03:51:36,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:36,335 INFO L482 AbstractCegarLoop]: Abstraction has 7937 states and 20801 transitions. [2021-06-05 03:51:36,335 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:36,335 INFO L276 IsEmpty]: Start isEmpty. Operand 7937 states and 20801 transitions. [2021-06-05 03:51:36,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-05 03:51:36,339 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:36,339 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:36,540 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable562 [2021-06-05 03:51:36,540 INFO L430 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:36,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:36,540 INFO L82 PathProgramCache]: Analyzing trace with hash 391944291, now seen corresponding path program 155 times [2021-06-05 03:51:36,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:36,540 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069798694] [2021-06-05 03:51:36,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:36,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:36,590 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 03:51:36,591 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:36,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069798694] [2021-06-05 03:51:36,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069798694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:36,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796719480] [2021-06-05 03:51:36,591 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:36,620 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-06-05 03:51:36,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:51:36,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 03:51:36,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:51:36,682 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 03:51:36,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796719480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:36,682 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:51:36,682 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-05 03:51:36,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519321591] [2021-06-05 03:51:36,682 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 03:51:36,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:36,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 03:51:36,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-06-05 03:51:36,683 INFO L87 Difference]: Start difference. First operand 7937 states and 20801 transitions. Second operand has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:36,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:36,920 INFO L93 Difference]: Finished difference Result 8848 states and 22578 transitions. [2021-06-05 03:51:36,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 03:51:36,920 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-06-05 03:51:36,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:36,929 INFO L225 Difference]: With dead ends: 8848 [2021-06-05 03:51:36,930 INFO L226 Difference]: Without dead ends: 8814 [2021-06-05 03:51:36,930 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 40.6ms TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-06-05 03:51:36,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8814 states. [2021-06-05 03:51:37,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8814 to 8036. [2021-06-05 03:51:37,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8036 states, 8035 states have (on average 2.612196639701307) internal successors, (20989), 8035 states have internal predecessors, (20989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:37,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8036 states to 8036 states and 20989 transitions. [2021-06-05 03:51:37,023 INFO L78 Accepts]: Start accepts. Automaton has 8036 states and 20989 transitions. Word has length 50 [2021-06-05 03:51:37,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:37,023 INFO L482 AbstractCegarLoop]: Abstraction has 8036 states and 20989 transitions. [2021-06-05 03:51:37,023 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:37,023 INFO L276 IsEmpty]: Start isEmpty. Operand 8036 states and 20989 transitions. [2021-06-05 03:51:37,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-05 03:51:37,028 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:37,028 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:37,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable563,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:37,228 INFO L430 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:37,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:37,229 INFO L82 PathProgramCache]: Analyzing trace with hash 922219143, now seen corresponding path program 156 times [2021-06-05 03:51:37,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:37,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984395745] [2021-06-05 03:51:37,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:37,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:37,279 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 03:51:37,279 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:37,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984395745] [2021-06-05 03:51:37,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984395745] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:37,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304472500] [2021-06-05 03:51:37,280 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:37,308 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-06-05 03:51:37,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:51:37,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 03:51:37,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:51:37,367 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 03:51:37,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304472500] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:37,367 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:51:37,367 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-05 03:51:37,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166405761] [2021-06-05 03:51:37,367 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 03:51:37,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:37,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 03:51:37,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-06-05 03:51:37,368 INFO L87 Difference]: Start difference. First operand 8036 states and 20989 transitions. Second operand has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:37,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:37,611 INFO L93 Difference]: Finished difference Result 9347 states and 23857 transitions. [2021-06-05 03:51:37,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 03:51:37,612 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-06-05 03:51:37,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:37,621 INFO L225 Difference]: With dead ends: 9347 [2021-06-05 03:51:37,621 INFO L226 Difference]: Without dead ends: 9311 [2021-06-05 03:51:37,621 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 40.4ms TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-06-05 03:51:37,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9311 states. [2021-06-05 03:51:37,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9311 to 8477. [2021-06-05 03:51:37,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8477 states, 8476 states have (on average 2.612907031618688) internal successors, (22147), 8476 states have internal predecessors, (22147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:37,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8477 states to 8477 states and 22147 transitions. [2021-06-05 03:51:37,712 INFO L78 Accepts]: Start accepts. Automaton has 8477 states and 22147 transitions. Word has length 50 [2021-06-05 03:51:37,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:37,712 INFO L482 AbstractCegarLoop]: Abstraction has 8477 states and 22147 transitions. [2021-06-05 03:51:37,712 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:37,713 INFO L276 IsEmpty]: Start isEmpty. Operand 8477 states and 22147 transitions. [2021-06-05 03:51:37,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-05 03:51:37,717 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:37,717 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:37,918 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 280 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable564 [2021-06-05 03:51:37,918 INFO L430 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:37,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:37,918 INFO L82 PathProgramCache]: Analyzing trace with hash 1450620387, now seen corresponding path program 157 times [2021-06-05 03:51:37,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:37,918 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938460547] [2021-06-05 03:51:37,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:37,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:37,968 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 03:51:37,968 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:37,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938460547] [2021-06-05 03:51:37,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938460547] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:37,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578905301] [2021-06-05 03:51:37,969 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:37,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:37,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 03:51:37,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:51:38,052 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 03:51:38,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578905301] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:38,053 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:51:38,053 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-05 03:51:38,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963365941] [2021-06-05 03:51:38,053 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 03:51:38,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:38,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 03:51:38,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-06-05 03:51:38,053 INFO L87 Difference]: Start difference. First operand 8477 states and 22147 transitions. Second operand has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 8 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:38,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:38,287 INFO L93 Difference]: Finished difference Result 9828 states and 25051 transitions. [2021-06-05 03:51:38,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 03:51:38,288 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 8 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-06-05 03:51:38,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:38,297 INFO L225 Difference]: With dead ends: 9828 [2021-06-05 03:51:38,297 INFO L226 Difference]: Without dead ends: 9803 [2021-06-05 03:51:38,297 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 40.3ms TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-06-05 03:51:38,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9803 states. [2021-06-05 03:51:38,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9803 to 8967. [2021-06-05 03:51:38,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8967 states, 8966 states have (on average 2.605955833147446) internal successors, (23365), 8966 states have internal predecessors, (23365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:38,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8967 states to 8967 states and 23365 transitions. [2021-06-05 03:51:38,394 INFO L78 Accepts]: Start accepts. Automaton has 8967 states and 23365 transitions. Word has length 50 [2021-06-05 03:51:38,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:38,394 INFO L482 AbstractCegarLoop]: Abstraction has 8967 states and 23365 transitions. [2021-06-05 03:51:38,394 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 8 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:38,394 INFO L276 IsEmpty]: Start isEmpty. Operand 8967 states and 23365 transitions. [2021-06-05 03:51:38,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 03:51:38,400 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:38,400 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:38,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 281 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable565 [2021-06-05 03:51:38,601 INFO L430 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:38,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:38,601 INFO L82 PathProgramCache]: Analyzing trace with hash -1040519320, now seen corresponding path program 74 times [2021-06-05 03:51:38,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:38,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574218116] [2021-06-05 03:51:38,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:38,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:38,729 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 127 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:38,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:38,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574218116] [2021-06-05 03:51:38,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574218116] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:38,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964784720] [2021-06-05 03:51:38,729 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:38,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:51:38,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:51:38,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 03:51:38,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:51:39,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 03:51:39,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 03:51:39,530 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 03:51:39,532 INFO L628 ElimStorePlain]: treesize reduction 19, result has 5.0 percent of original size [2021-06-05 03:51:39,532 INFO L518 ElimStorePlain]: Eliminatee B vanished before elimination [2021-06-05 03:51:39,532 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 03:51:39,532 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:27, output treesize:1 [2021-06-05 03:51:39,537 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 52 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:39,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964784720] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:39,537 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:51:39,537 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 34 [2021-06-05 03:51:39,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107261926] [2021-06-05 03:51:39,537 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 03:51:39,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:39,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 03:51:39,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1073, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 03:51:39,538 INFO L87 Difference]: Start difference. First operand 8967 states and 23365 transitions. Second operand has 35 states, 35 states have (on average 2.8285714285714287) internal successors, (99), 34 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:50,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:50,638 INFO L93 Difference]: Finished difference Result 20584 states and 47715 transitions. [2021-06-05 03:51:50,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 233 states. [2021-06-05 03:51:50,638 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.8285714285714287) internal successors, (99), 34 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 03:51:50,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:50,658 INFO L225 Difference]: With dead ends: 20584 [2021-06-05 03:51:50,658 INFO L226 Difference]: Without dead ends: 19760 [2021-06-05 03:51:50,660 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 252 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25560 ImplicationChecksByTransitivity, 9355.3ms TimeCoverageRelationStatistics Valid=7737, Invalid=56525, Unknown=0, NotChecked=0, Total=64262 [2021-06-05 03:51:50,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19760 states. [2021-06-05 03:51:50,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19760 to 9874. [2021-06-05 03:51:50,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9874 states, 9873 states have (on average 2.635976906715284) internal successors, (26025), 9873 states have internal predecessors, (26025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:50,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9874 states to 9874 states and 26025 transitions. [2021-06-05 03:51:50,816 INFO L78 Accepts]: Start accepts. Automaton has 9874 states and 26025 transitions. Word has length 53 [2021-06-05 03:51:50,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:50,816 INFO L482 AbstractCegarLoop]: Abstraction has 9874 states and 26025 transitions. [2021-06-05 03:51:50,816 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.8285714285714287) internal successors, (99), 34 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:50,816 INFO L276 IsEmpty]: Start isEmpty. Operand 9874 states and 26025 transitions. [2021-06-05 03:51:50,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 03:51:50,823 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:50,823 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:51,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable566,282 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:51,024 INFO L430 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:51,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:51,024 INFO L82 PathProgramCache]: Analyzing trace with hash 1328551784, now seen corresponding path program 158 times [2021-06-05 03:51:51,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:51,024 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776979922] [2021-06-05 03:51:51,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:51,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:51,190 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:51,190 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:51,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776979922] [2021-06-05 03:51:51,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776979922] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:51,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576534133] [2021-06-05 03:51:51,190 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:51,216 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:51:51,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:51:51,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 03:51:51,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:51:51,461 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 13 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:51,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576534133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:51,461 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:51:51,461 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-06-05 03:51:51,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166498719] [2021-06-05 03:51:51,461 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 03:51:51,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:51,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 03:51:51,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-06-05 03:51:51,462 INFO L87 Difference]: Start difference. First operand 9874 states and 26025 transitions. Second operand has 23 states, 23 states have (on average 3.3043478260869565) internal successors, (76), 22 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:52,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:52,266 INFO L93 Difference]: Finished difference Result 10122 states and 26411 transitions. [2021-06-05 03:51:52,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 03:51:52,267 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.3043478260869565) internal successors, (76), 22 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 03:51:52,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:52,278 INFO L225 Difference]: With dead ends: 10122 [2021-06-05 03:51:52,278 INFO L226 Difference]: Without dead ends: 10030 [2021-06-05 03:51:52,278 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 258.1ms TimeCoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-06-05 03:51:52,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10030 states. [2021-06-05 03:51:52,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10030 to 9858. [2021-06-05 03:51:52,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9858 states, 9857 states have (on average 2.632038145480369) internal successors, (25944), 9857 states have internal predecessors, (25944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:52,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9858 states to 9858 states and 25944 transitions. [2021-06-05 03:51:52,390 INFO L78 Accepts]: Start accepts. Automaton has 9858 states and 25944 transitions. Word has length 53 [2021-06-05 03:51:52,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:52,390 INFO L482 AbstractCegarLoop]: Abstraction has 9858 states and 25944 transitions. [2021-06-05 03:51:52,391 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 3.3043478260869565) internal successors, (76), 22 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:52,391 INFO L276 IsEmpty]: Start isEmpty. Operand 9858 states and 25944 transitions. [2021-06-05 03:51:52,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 03:51:52,397 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:52,397 INFO L521 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:52,598 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 283 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable575 [2021-06-05 03:51:52,598 INFO L430 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:52,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:52,598 INFO L82 PathProgramCache]: Analyzing trace with hash -1609870245, now seen corresponding path program 75 times [2021-06-05 03:51:52,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:52,598 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597139511] [2021-06-05 03:51:52,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:52,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:52,657 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 79 proven. 56 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:51:52,657 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:52,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597139511] [2021-06-05 03:51:52,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597139511] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:52,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975170556] [2021-06-05 03:51:52,657 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:52,686 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-05 03:51:52,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:51:52,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 03:51:52,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:51:52,768 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 80 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:51:52,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975170556] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:52,768 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:51:52,768 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 11 [2021-06-05 03:51:52,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828848073] [2021-06-05 03:51:52,768 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 03:51:52,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:52,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 03:51:52,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:51:52,769 INFO L87 Difference]: Start difference. First operand 9858 states and 25944 transitions. Second operand has 12 states, 12 states have (on average 4.75) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:52,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:52,956 INFO L93 Difference]: Finished difference Result 13958 states and 35088 transitions. [2021-06-05 03:51:52,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 03:51:52,956 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 03:51:52,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:52,968 INFO L225 Difference]: With dead ends: 13958 [2021-06-05 03:51:52,969 INFO L226 Difference]: Without dead ends: 13958 [2021-06-05 03:51:52,969 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 63.2ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:51:52,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13958 states. [2021-06-05 03:51:53,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13958 to 10572. [2021-06-05 03:51:53,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10572 states, 10571 states have (on average 2.6615268186548104) internal successors, (28135), 10571 states have internal predecessors, (28135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:53,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10572 states to 10572 states and 28135 transitions. [2021-06-05 03:51:53,103 INFO L78 Accepts]: Start accepts. Automaton has 10572 states and 28135 transitions. Word has length 53 [2021-06-05 03:51:53,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:53,103 INFO L482 AbstractCegarLoop]: Abstraction has 10572 states and 28135 transitions. [2021-06-05 03:51:53,104 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:53,104 INFO L276 IsEmpty]: Start isEmpty. Operand 10572 states and 28135 transitions. [2021-06-05 03:51:53,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 03:51:53,111 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:53,111 INFO L521 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:53,311 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 284 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable576 [2021-06-05 03:51:53,311 INFO L430 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:53,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:53,311 INFO L82 PathProgramCache]: Analyzing trace with hash -2143735621, now seen corresponding path program 159 times [2021-06-05 03:51:53,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:53,311 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355130801] [2021-06-05 03:51:53,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:53,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:53,371 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 66 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:51:53,372 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:53,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355130801] [2021-06-05 03:51:53,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355130801] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:53,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820429762] [2021-06-05 03:51:53,372 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:53,400 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 03:51:53,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:51:53,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 03:51:53,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:51:53,468 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 66 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:51:53,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820429762] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:53,468 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:51:53,468 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 03:51:53,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439571026] [2021-06-05 03:51:53,469 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 03:51:53,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:53,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 03:51:53,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-06-05 03:51:53,469 INFO L87 Difference]: Start difference. First operand 10572 states and 28135 transitions. Second operand has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:53,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:53,598 INFO L93 Difference]: Finished difference Result 11271 states and 29322 transitions. [2021-06-05 03:51:53,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 03:51:53,599 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 03:51:53,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:53,610 INFO L225 Difference]: With dead ends: 11271 [2021-06-05 03:51:53,610 INFO L226 Difference]: Without dead ends: 11265 [2021-06-05 03:51:53,610 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 55.2ms TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:51:53,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11265 states. [2021-06-05 03:51:53,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11265 to 10496. [2021-06-05 03:51:53,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10496 states, 10495 states have (on average 2.6580276322058123) internal successors, (27896), 10495 states have internal predecessors, (27896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:53,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10496 states to 10496 states and 27896 transitions. [2021-06-05 03:51:53,734 INFO L78 Accepts]: Start accepts. Automaton has 10496 states and 27896 transitions. Word has length 53 [2021-06-05 03:51:53,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:53,734 INFO L482 AbstractCegarLoop]: Abstraction has 10496 states and 27896 transitions. [2021-06-05 03:51:53,735 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:53,735 INFO L276 IsEmpty]: Start isEmpty. Operand 10496 states and 27896 transitions. [2021-06-05 03:51:53,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 03:51:53,742 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:53,742 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:53,942 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable577 [2021-06-05 03:51:53,942 INFO L430 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:53,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:53,942 INFO L82 PathProgramCache]: Analyzing trace with hash 1194965254, now seen corresponding path program 76 times [2021-06-05 03:51:53,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:53,943 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239063472] [2021-06-05 03:51:53,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:53,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:54,018 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 8 proven. 123 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:51:54,018 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:54,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239063472] [2021-06-05 03:51:54,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239063472] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:54,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459491879] [2021-06-05 03:51:54,018 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:54,044 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:51:54,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:51:54,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 03:51:54,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:51:54,116 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 124 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:51:54,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459491879] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:54,117 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:51:54,117 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 03:51:54,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220991131] [2021-06-05 03:51:54,117 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 03:51:54,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:54,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 03:51:54,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-05 03:51:54,117 INFO L87 Difference]: Start difference. First operand 10496 states and 27896 transitions. Second operand has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:54,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:54,485 INFO L93 Difference]: Finished difference Result 11930 states and 30766 transitions. [2021-06-05 03:51:54,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 03:51:54,485 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 03:51:54,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:54,497 INFO L225 Difference]: With dead ends: 11930 [2021-06-05 03:51:54,497 INFO L226 Difference]: Without dead ends: 11885 [2021-06-05 03:51:54,498 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 115.5ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:51:54,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11885 states. [2021-06-05 03:51:54,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11885 to 10613. [2021-06-05 03:51:54,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10613 states, 10612 states have (on average 2.6563324538258577) internal successors, (28189), 10612 states have internal predecessors, (28189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:54,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10613 states to 10613 states and 28189 transitions. [2021-06-05 03:51:54,634 INFO L78 Accepts]: Start accepts. Automaton has 10613 states and 28189 transitions. Word has length 53 [2021-06-05 03:51:54,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:54,634 INFO L482 AbstractCegarLoop]: Abstraction has 10613 states and 28189 transitions. [2021-06-05 03:51:54,634 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:54,634 INFO L276 IsEmpty]: Start isEmpty. Operand 10613 states and 28189 transitions. [2021-06-05 03:51:54,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 03:51:54,641 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:54,641 INFO L521 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:54,842 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable580,286 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:54,842 INFO L430 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:54,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:54,842 INFO L82 PathProgramCache]: Analyzing trace with hash -358731603, now seen corresponding path program 160 times [2021-06-05 03:51:54,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:54,842 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157980303] [2021-06-05 03:51:54,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:54,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:54,891 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 62 proven. 69 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 03:51:54,892 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:54,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157980303] [2021-06-05 03:51:54,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157980303] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:54,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497268021] [2021-06-05 03:51:54,892 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:54,917 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:51:54,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:51:54,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 03:51:54,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:51:54,984 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 62 proven. 69 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 03:51:54,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497268021] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:54,984 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:51:54,984 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 03:51:54,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986910167] [2021-06-05 03:51:54,984 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 03:51:54,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:54,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 03:51:54,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-06-05 03:51:54,984 INFO L87 Difference]: Start difference. First operand 10613 states and 28189 transitions. Second operand has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:55,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:55,134 INFO L93 Difference]: Finished difference Result 11953 states and 30528 transitions. [2021-06-05 03:51:55,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 03:51:55,135 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 03:51:55,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:55,147 INFO L225 Difference]: With dead ends: 11953 [2021-06-05 03:51:55,147 INFO L226 Difference]: Without dead ends: 11950 [2021-06-05 03:51:55,147 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 44.3ms TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-06-05 03:51:55,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11950 states. [2021-06-05 03:51:55,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11950 to 10587. [2021-06-05 03:51:55,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10587 states, 10586 states have (on average 2.65397695068959) internal successors, (28095), 10586 states have internal predecessors, (28095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:55,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10587 states to 10587 states and 28095 transitions. [2021-06-05 03:51:55,307 INFO L78 Accepts]: Start accepts. Automaton has 10587 states and 28095 transitions. Word has length 53 [2021-06-05 03:51:55,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:55,307 INFO L482 AbstractCegarLoop]: Abstraction has 10587 states and 28095 transitions. [2021-06-05 03:51:55,307 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:55,307 INFO L276 IsEmpty]: Start isEmpty. Operand 10587 states and 28095 transitions. [2021-06-05 03:51:55,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 03:51:55,315 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:55,315 INFO L521 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:55,515 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable581,287 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:55,515 INFO L430 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:55,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:55,516 INFO L82 PathProgramCache]: Analyzing trace with hash -151669037, now seen corresponding path program 161 times [2021-06-05 03:51:55,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:55,516 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387529645] [2021-06-05 03:51:55,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:55,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:55,579 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 59 proven. 72 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 03:51:55,579 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:55,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387529645] [2021-06-05 03:51:55,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387529645] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:55,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454005569] [2021-06-05 03:51:55,580 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:55,607 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 03:51:55,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:51:55,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 03:51:55,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:51:55,707 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 63 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:51:55,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454005569] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:55,707 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:51:55,707 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 16 [2021-06-05 03:51:55,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749321132] [2021-06-05 03:51:55,707 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 03:51:55,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:55,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 03:51:55,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:51:55,708 INFO L87 Difference]: Start difference. First operand 10587 states and 28095 transitions. Second operand has 17 states, 17 states have (on average 4.529411764705882) internal successors, (77), 16 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:55,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:55,972 INFO L93 Difference]: Finished difference Result 12225 states and 31030 transitions. [2021-06-05 03:51:55,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 03:51:55,973 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.529411764705882) internal successors, (77), 16 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 03:51:55,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:55,986 INFO L225 Difference]: With dead ends: 12225 [2021-06-05 03:51:55,986 INFO L226 Difference]: Without dead ends: 12207 [2021-06-05 03:51:55,986 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 99.7ms TimeCoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2021-06-05 03:51:55,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12207 states. [2021-06-05 03:51:56,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12207 to 10208. [2021-06-05 03:51:56,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10208 states, 10207 states have (on average 2.6436759086901147) internal successors, (26984), 10207 states have internal predecessors, (26984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:56,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10208 states to 10208 states and 26984 transitions. [2021-06-05 03:51:56,113 INFO L78 Accepts]: Start accepts. Automaton has 10208 states and 26984 transitions. Word has length 53 [2021-06-05 03:51:56,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:56,113 INFO L482 AbstractCegarLoop]: Abstraction has 10208 states and 26984 transitions. [2021-06-05 03:51:56,113 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.529411764705882) internal successors, (77), 16 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:56,113 INFO L276 IsEmpty]: Start isEmpty. Operand 10208 states and 26984 transitions. [2021-06-05 03:51:56,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 03:51:56,120 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:56,120 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:56,321 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable583,288 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:56,321 INFO L430 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:56,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:56,321 INFO L82 PathProgramCache]: Analyzing trace with hash -1599669050, now seen corresponding path program 162 times [2021-06-05 03:51:56,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:56,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529554336] [2021-06-05 03:51:56,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:56,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:56,392 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 18 proven. 113 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:51:56,392 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:56,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529554336] [2021-06-05 03:51:56,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529554336] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:56,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345088672] [2021-06-05 03:51:56,392 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:56,422 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-05 03:51:56,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:51:56,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 03:51:56,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:51:56,607 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 03:51:56,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 16 [2021-06-05 03:51:56,608 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 03:51:56,614 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 03:51:56,614 INFO L518 ElimStorePlain]: Eliminatee B vanished before elimination [2021-06-05 03:51:56,614 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 03:51:56,614 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:27, output treesize:19 [2021-06-05 03:51:56,651 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 45 proven. 87 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:51:56,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345088672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:56,651 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:51:56,651 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12] total 20 [2021-06-05 03:51:56,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773513687] [2021-06-05 03:51:56,652 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 03:51:56,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:56,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 03:51:56,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:51:56,652 INFO L87 Difference]: Start difference. First operand 10208 states and 26984 transitions. Second operand has 21 states, 21 states have (on average 4.666666666666667) internal successors, (98), 20 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:58,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:58,918 INFO L93 Difference]: Finished difference Result 13433 states and 33117 transitions. [2021-06-05 03:51:58,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-06-05 03:51:58,919 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.666666666666667) internal successors, (98), 20 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 03:51:58,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:58,932 INFO L225 Difference]: With dead ends: 13433 [2021-06-05 03:51:58,932 INFO L226 Difference]: Without dead ends: 13411 [2021-06-05 03:51:58,933 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2987 ImplicationChecksByTransitivity, 1363.8ms TimeCoverageRelationStatistics Valid=1527, Invalid=7403, Unknown=0, NotChecked=0, Total=8930 [2021-06-05 03:51:58,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13411 states. [2021-06-05 03:51:59,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13411 to 10206. [2021-06-05 03:51:59,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10206 states, 10205 states have (on average 2.6425281724644782) internal successors, (26967), 10205 states have internal predecessors, (26967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:59,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10206 states to 10206 states and 26967 transitions. [2021-06-05 03:51:59,066 INFO L78 Accepts]: Start accepts. Automaton has 10206 states and 26967 transitions. Word has length 53 [2021-06-05 03:51:59,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:59,066 INFO L482 AbstractCegarLoop]: Abstraction has 10206 states and 26967 transitions. [2021-06-05 03:51:59,066 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 4.666666666666667) internal successors, (98), 20 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:59,066 INFO L276 IsEmpty]: Start isEmpty. Operand 10206 states and 26967 transitions. [2021-06-05 03:51:59,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 03:51:59,074 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:59,074 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:51:59,274 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable586,289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:59,274 INFO L430 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:51:59,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:51:59,274 INFO L82 PathProgramCache]: Analyzing trace with hash 2081762066, now seen corresponding path program 163 times [2021-06-05 03:51:59,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:51:59,274 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237284508] [2021-06-05 03:51:59,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:51:59,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:59,349 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 114 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 03:51:59,350 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:51:59,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237284508] [2021-06-05 03:51:59,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237284508] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:59,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223086367] [2021-06-05 03:51:59,350 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:51:59,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:51:59,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 03:51:59,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:51:59,447 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 115 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 03:51:59,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223086367] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:51:59,447 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:51:59,447 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 03:51:59,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944149087] [2021-06-05 03:51:59,447 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 03:51:59,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:51:59,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 03:51:59,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-05 03:51:59,447 INFO L87 Difference]: Start difference. First operand 10206 states and 26967 transitions. Second operand has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:59,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:51:59,846 INFO L93 Difference]: Finished difference Result 11323 states and 29185 transitions. [2021-06-05 03:51:59,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 03:51:59,846 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 03:51:59,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:51:59,857 INFO L225 Difference]: With dead ends: 11323 [2021-06-05 03:51:59,857 INFO L226 Difference]: Without dead ends: 11323 [2021-06-05 03:51:59,857 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 115.5ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:51:59,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11323 states. [2021-06-05 03:51:59,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11323 to 10216. [2021-06-05 03:51:59,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10216 states, 10215 states have (on average 2.6420949583945177) internal successors, (26989), 10215 states have internal predecessors, (26989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:59,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10216 states to 10216 states and 26989 transitions. [2021-06-05 03:51:59,978 INFO L78 Accepts]: Start accepts. Automaton has 10216 states and 26989 transitions. Word has length 53 [2021-06-05 03:51:59,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:51:59,978 INFO L482 AbstractCegarLoop]: Abstraction has 10216 states and 26989 transitions. [2021-06-05 03:51:59,978 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:51:59,978 INFO L276 IsEmpty]: Start isEmpty. Operand 10216 states and 26989 transitions. [2021-06-05 03:51:59,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 03:51:59,985 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:51:59,985 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:00,186 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable587 [2021-06-05 03:52:00,186 INFO L430 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:00,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:00,186 INFO L82 PathProgramCache]: Analyzing trace with hash -71287896, now seen corresponding path program 164 times [2021-06-05 03:52:00,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:00,186 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020030499] [2021-06-05 03:52:00,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:00,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:00,260 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 119 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:52:00,260 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:00,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020030499] [2021-06-05 03:52:00,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020030499] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:00,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129983327] [2021-06-05 03:52:00,261 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:00,287 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:52:00,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:52:00,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 03:52:00,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:00,358 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 119 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:52:00,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129983327] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:00,358 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:00,358 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 03:52:00,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062166778] [2021-06-05 03:52:00,358 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 03:52:00,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:00,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 03:52:00,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:52:00,359 INFO L87 Difference]: Start difference. First operand 10216 states and 26989 transitions. Second operand has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:00,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:00,847 INFO L93 Difference]: Finished difference Result 11942 states and 30505 transitions. [2021-06-05 03:52:00,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 03:52:00,847 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 03:52:00,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:00,859 INFO L225 Difference]: With dead ends: 11942 [2021-06-05 03:52:00,859 INFO L226 Difference]: Without dead ends: 11942 [2021-06-05 03:52:00,860 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 140.4ms TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:52:00,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11942 states. [2021-06-05 03:52:00,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11942 to 10248. [2021-06-05 03:52:00,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10248 states, 10247 states have (on average 2.641163267297746) internal successors, (27064), 10247 states have internal predecessors, (27064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:00,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10248 states to 10248 states and 27064 transitions. [2021-06-05 03:52:00,979 INFO L78 Accepts]: Start accepts. Automaton has 10248 states and 27064 transitions. Word has length 53 [2021-06-05 03:52:00,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:00,979 INFO L482 AbstractCegarLoop]: Abstraction has 10248 states and 27064 transitions. [2021-06-05 03:52:00,979 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:00,979 INFO L276 IsEmpty]: Start isEmpty. Operand 10248 states and 27064 transitions. [2021-06-05 03:52:00,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 03:52:00,986 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:00,986 INFO L521 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:01,186 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable588,291 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:01,187 INFO L430 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:01,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:01,187 INFO L82 PathProgramCache]: Analyzing trace with hash -309349413, now seen corresponding path program 77 times [2021-06-05 03:52:01,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:01,187 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610707464] [2021-06-05 03:52:01,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:01,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:01,242 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 84 proven. 51 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:52:01,242 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:01,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610707464] [2021-06-05 03:52:01,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610707464] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:01,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119977254] [2021-06-05 03:52:01,243 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:01,273 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-05 03:52:01,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:52:01,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 03:52:01,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:01,359 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 85 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:01,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119977254] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:01,360 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:01,360 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 13 [2021-06-05 03:52:01,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444424665] [2021-06-05 03:52:01,360 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:52:01,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:01,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:52:01,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:52:01,360 INFO L87 Difference]: Start difference. First operand 10248 states and 27064 transitions. Second operand has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:01,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:01,586 INFO L93 Difference]: Finished difference Result 13713 states and 34190 transitions. [2021-06-05 03:52:01,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 03:52:01,587 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 03:52:01,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:01,603 INFO L225 Difference]: With dead ends: 13713 [2021-06-05 03:52:01,604 INFO L226 Difference]: Without dead ends: 13705 [2021-06-05 03:52:01,604 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 75.9ms TimeCoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:52:01,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13705 states. [2021-06-05 03:52:01,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13705 to 10512. [2021-06-05 03:52:01,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10512 states, 10511 states have (on average 2.6529350204547617) internal successors, (27885), 10511 states have internal predecessors, (27885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:01,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10512 states to 10512 states and 27885 transitions. [2021-06-05 03:52:01,749 INFO L78 Accepts]: Start accepts. Automaton has 10512 states and 27885 transitions. Word has length 53 [2021-06-05 03:52:01,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:01,749 INFO L482 AbstractCegarLoop]: Abstraction has 10512 states and 27885 transitions. [2021-06-05 03:52:01,749 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:01,749 INFO L276 IsEmpty]: Start isEmpty. Operand 10512 states and 27885 transitions. [2021-06-05 03:52:01,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 03:52:01,756 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:01,757 INFO L521 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:01,957 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 292 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable589 [2021-06-05 03:52:01,957 INFO L430 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:01,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:01,957 INFO L82 PathProgramCache]: Analyzing trace with hash -931229823, now seen corresponding path program 78 times [2021-06-05 03:52:01,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:01,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622982429] [2021-06-05 03:52:01,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:01,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:02,013 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 84 proven. 50 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:52:02,013 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:02,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622982429] [2021-06-05 03:52:02,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622982429] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:02,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653540182] [2021-06-05 03:52:02,013 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:02,042 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-05 03:52:02,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:52:02,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 03:52:02,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:02,133 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 85 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:52:02,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653540182] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:02,133 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:02,133 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 13 [2021-06-05 03:52:02,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096627775] [2021-06-05 03:52:02,133 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:52:02,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:02,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:52:02,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:52:02,133 INFO L87 Difference]: Start difference. First operand 10512 states and 27885 transitions. Second operand has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:02,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:02,375 INFO L93 Difference]: Finished difference Result 15140 states and 37466 transitions. [2021-06-05 03:52:02,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 03:52:02,375 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 03:52:02,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:02,391 INFO L225 Difference]: With dead ends: 15140 [2021-06-05 03:52:02,391 INFO L226 Difference]: Without dead ends: 15140 [2021-06-05 03:52:02,392 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 82.6ms TimeCoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:52:02,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15140 states. [2021-06-05 03:52:02,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15140 to 10520. [2021-06-05 03:52:02,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10520 states, 10519 states have (on average 2.6527236429318375) internal successors, (27904), 10519 states have internal predecessors, (27904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:02,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10520 states to 10520 states and 27904 transitions. [2021-06-05 03:52:02,539 INFO L78 Accepts]: Start accepts. Automaton has 10520 states and 27904 transitions. Word has length 53 [2021-06-05 03:52:02,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:02,540 INFO L482 AbstractCegarLoop]: Abstraction has 10520 states and 27904 transitions. [2021-06-05 03:52:02,540 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:02,540 INFO L276 IsEmpty]: Start isEmpty. Operand 10520 states and 27904 transitions. [2021-06-05 03:52:02,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 03:52:02,547 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:02,547 INFO L521 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:02,747 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable591,293 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:02,748 INFO L430 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:02,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:02,748 INFO L82 PathProgramCache]: Analyzing trace with hash 1726165017, now seen corresponding path program 79 times [2021-06-05 03:52:02,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:02,748 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675262079] [2021-06-05 03:52:02,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:02,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:02,813 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 80 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:52:02,813 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:02,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675262079] [2021-06-05 03:52:02,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675262079] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:02,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017655443] [2021-06-05 03:52:02,813 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:02,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:02,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 03:52:02,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:02,959 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 81 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:02,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017655443] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:02,959 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:02,959 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 12 [2021-06-05 03:52:02,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65516708] [2021-06-05 03:52:02,959 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 03:52:02,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:02,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 03:52:02,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:52:02,959 INFO L87 Difference]: Start difference. First operand 10520 states and 27904 transitions. Second operand has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 12 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:03,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:03,174 INFO L93 Difference]: Finished difference Result 13839 states and 34594 transitions. [2021-06-05 03:52:03,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 03:52:03,175 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 12 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 03:52:03,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:03,189 INFO L225 Difference]: With dead ends: 13839 [2021-06-05 03:52:03,189 INFO L226 Difference]: Without dead ends: 13839 [2021-06-05 03:52:03,189 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 83.3ms TimeCoverageRelationStatistics Valid=94, Invalid=146, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:52:03,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13839 states. [2021-06-05 03:52:03,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13839 to 10344. [2021-06-05 03:52:03,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10344 states, 10343 states have (on average 2.6458474330465047) internal successors, (27366), 10343 states have internal predecessors, (27366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:03,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10344 states to 10344 states and 27366 transitions. [2021-06-05 03:52:03,333 INFO L78 Accepts]: Start accepts. Automaton has 10344 states and 27366 transitions. Word has length 53 [2021-06-05 03:52:03,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:03,333 INFO L482 AbstractCegarLoop]: Abstraction has 10344 states and 27366 transitions. [2021-06-05 03:52:03,333 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 12 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:03,333 INFO L276 IsEmpty]: Start isEmpty. Operand 10344 states and 27366 transitions. [2021-06-05 03:52:03,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 03:52:03,341 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:03,341 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:03,541 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable592,294 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:03,541 INFO L430 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:03,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:03,542 INFO L82 PathProgramCache]: Analyzing trace with hash 1133718440, now seen corresponding path program 80 times [2021-06-05 03:52:03,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:03,542 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128254909] [2021-06-05 03:52:03,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:03,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:03,624 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 22 proven. 111 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:52:03,624 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:03,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128254909] [2021-06-05 03:52:03,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128254909] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:03,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625695806] [2021-06-05 03:52:03,624 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:03,650 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:52:03,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:52:03,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 03:52:03,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:03,743 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 20 proven. 113 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:52:03,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625695806] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:03,743 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:03,743 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-06-05 03:52:03,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500061741] [2021-06-05 03:52:03,743 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 03:52:03,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:03,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 03:52:03,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:52:03,744 INFO L87 Difference]: Start difference. First operand 10344 states and 27366 transitions. Second operand has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 12 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:04,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:04,293 INFO L93 Difference]: Finished difference Result 10977 states and 28511 transitions. [2021-06-05 03:52:04,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 03:52:04,293 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 12 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 03:52:04,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:04,304 INFO L225 Difference]: With dead ends: 10977 [2021-06-05 03:52:04,304 INFO L226 Difference]: Without dead ends: 10881 [2021-06-05 03:52:04,305 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 135.1ms TimeCoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 03:52:04,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10881 states. [2021-06-05 03:52:04,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10881 to 10343. [2021-06-05 03:52:04,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10343 states, 10342 states have (on average 2.6447495648810673) internal successors, (27352), 10342 states have internal predecessors, (27352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:04,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10343 states to 10343 states and 27352 transitions. [2021-06-05 03:52:04,422 INFO L78 Accepts]: Start accepts. Automaton has 10343 states and 27352 transitions. Word has length 53 [2021-06-05 03:52:04,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:04,422 INFO L482 AbstractCegarLoop]: Abstraction has 10343 states and 27352 transitions. [2021-06-05 03:52:04,422 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 12 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:04,422 INFO L276 IsEmpty]: Start isEmpty. Operand 10343 states and 27352 transitions. [2021-06-05 03:52:04,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 03:52:04,429 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:04,429 INFO L521 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:04,630 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable593,295 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:04,630 INFO L430 AbstractCegarLoop]: === Iteration 304 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:04,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:04,630 INFO L82 PathProgramCache]: Analyzing trace with hash 1461271213, now seen corresponding path program 165 times [2021-06-05 03:52:04,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:04,630 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822207121] [2021-06-05 03:52:04,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:04,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:04,694 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 61 proven. 74 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:52:04,694 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:04,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822207121] [2021-06-05 03:52:04,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822207121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:04,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012512811] [2021-06-05 03:52:04,694 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:04,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 03:52:04,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:52:04,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 03:52:04,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:04,792 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 61 proven. 74 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:52:04,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012512811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:04,792 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:04,792 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 03:52:04,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948640684] [2021-06-05 03:52:04,792 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 03:52:04,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:04,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 03:52:04,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:52:04,793 INFO L87 Difference]: Start difference. First operand 10343 states and 27352 transitions. Second operand has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:04,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:04,955 INFO L93 Difference]: Finished difference Result 11313 states and 29024 transitions. [2021-06-05 03:52:04,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 03:52:04,956 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 03:52:04,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:04,967 INFO L225 Difference]: With dead ends: 11313 [2021-06-05 03:52:04,967 INFO L226 Difference]: Without dead ends: 11295 [2021-06-05 03:52:04,967 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 66.8ms TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:52:04,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11295 states. [2021-06-05 03:52:05,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11295 to 10343. [2021-06-05 03:52:05,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10343 states, 10342 states have (on average 2.643782633919938) internal successors, (27342), 10342 states have internal predecessors, (27342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:05,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10343 states to 10343 states and 27342 transitions. [2021-06-05 03:52:05,090 INFO L78 Accepts]: Start accepts. Automaton has 10343 states and 27342 transitions. Word has length 53 [2021-06-05 03:52:05,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:05,090 INFO L482 AbstractCegarLoop]: Abstraction has 10343 states and 27342 transitions. [2021-06-05 03:52:05,090 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:05,090 INFO L276 IsEmpty]: Start isEmpty. Operand 10343 states and 27342 transitions. [2021-06-05 03:52:05,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 03:52:05,097 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:05,097 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:05,297 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable594,296 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:05,297 INFO L430 AbstractCegarLoop]: === Iteration 305 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:05,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:05,298 INFO L82 PathProgramCache]: Analyzing trace with hash -1403224534, now seen corresponding path program 81 times [2021-06-05 03:52:05,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:05,298 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498480841] [2021-06-05 03:52:05,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:05,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:05,412 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 8 proven. 123 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:52:05,413 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:05,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498480841] [2021-06-05 03:52:05,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498480841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:05,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541689991] [2021-06-05 03:52:05,413 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:05,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-06-05 03:52:05,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:52:05,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 03:52:05,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:05,515 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 124 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:52:05,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541689991] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:05,516 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:05,516 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 03:52:05,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072940121] [2021-06-05 03:52:05,516 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 03:52:05,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:05,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 03:52:05,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-05 03:52:05,516 INFO L87 Difference]: Start difference. First operand 10343 states and 27342 transitions. Second operand has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:05,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:05,920 INFO L93 Difference]: Finished difference Result 11804 states and 30259 transitions. [2021-06-05 03:52:05,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 03:52:05,921 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 03:52:05,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:05,933 INFO L225 Difference]: With dead ends: 11804 [2021-06-05 03:52:05,933 INFO L226 Difference]: Without dead ends: 11766 [2021-06-05 03:52:05,933 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 155.8ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:52:05,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11766 states. [2021-06-05 03:52:06,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11766 to 10492. [2021-06-05 03:52:06,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10492 states, 10491 states have (on average 2.6421694786007053) internal successors, (27719), 10491 states have internal predecessors, (27719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:06,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10492 states to 10492 states and 27719 transitions. [2021-06-05 03:52:06,059 INFO L78 Accepts]: Start accepts. Automaton has 10492 states and 27719 transitions. Word has length 53 [2021-06-05 03:52:06,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:06,059 INFO L482 AbstractCegarLoop]: Abstraction has 10492 states and 27719 transitions. [2021-06-05 03:52:06,059 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:06,059 INFO L276 IsEmpty]: Start isEmpty. Operand 10492 states and 27719 transitions. [2021-06-05 03:52:06,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 03:52:06,067 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:06,067 INFO L521 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:06,267 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable598 [2021-06-05 03:52:06,267 INFO L430 AbstractCegarLoop]: === Iteration 306 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:06,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:06,268 INFO L82 PathProgramCache]: Analyzing trace with hash 1338045905, now seen corresponding path program 166 times [2021-06-05 03:52:06,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:06,268 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201992391] [2021-06-05 03:52:06,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:06,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:06,315 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 52 proven. 79 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 03:52:06,315 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:06,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201992391] [2021-06-05 03:52:06,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201992391] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:06,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414816382] [2021-06-05 03:52:06,316 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:06,341 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:52:06,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:52:06,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 03:52:06,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:06,409 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 52 proven. 79 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 03:52:06,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414816382] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:06,409 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:06,409 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 03:52:06,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838513242] [2021-06-05 03:52:06,409 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 03:52:06,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:06,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 03:52:06,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-06-05 03:52:06,409 INFO L87 Difference]: Start difference. First operand 10492 states and 27719 transitions. Second operand has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:06,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:06,552 INFO L93 Difference]: Finished difference Result 12007 states and 30378 transitions. [2021-06-05 03:52:06,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 03:52:06,552 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 03:52:06,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:06,564 INFO L225 Difference]: With dead ends: 12007 [2021-06-05 03:52:06,564 INFO L226 Difference]: Without dead ends: 12004 [2021-06-05 03:52:06,564 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 42.5ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-06-05 03:52:06,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12004 states. [2021-06-05 03:52:06,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12004 to 10472. [2021-06-05 03:52:06,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10472 states, 10471 states have (on average 2.639957979180594) internal successors, (27643), 10471 states have internal predecessors, (27643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:06,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10472 states to 10472 states and 27643 transitions. [2021-06-05 03:52:06,703 INFO L78 Accepts]: Start accepts. Automaton has 10472 states and 27643 transitions. Word has length 53 [2021-06-05 03:52:06,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:06,703 INFO L482 AbstractCegarLoop]: Abstraction has 10472 states and 27643 transitions. [2021-06-05 03:52:06,704 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:06,704 INFO L276 IsEmpty]: Start isEmpty. Operand 10472 states and 27643 transitions. [2021-06-05 03:52:06,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 03:52:06,712 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:06,712 INFO L521 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:06,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 298 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable599 [2021-06-05 03:52:06,912 INFO L430 AbstractCegarLoop]: === Iteration 307 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:06,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:06,912 INFO L82 PathProgramCache]: Analyzing trace with hash 1545108471, now seen corresponding path program 167 times [2021-06-05 03:52:06,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:06,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442016741] [2021-06-05 03:52:06,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:06,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:06,967 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 48 proven. 83 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 03:52:06,967 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:06,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442016741] [2021-06-05 03:52:06,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442016741] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:06,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177204923] [2021-06-05 03:52:06,967 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:06,997 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-05 03:52:06,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:52:06,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 03:52:06,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:07,096 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 52 proven. 83 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:52:07,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177204923] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:07,096 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:07,096 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2021-06-05 03:52:07,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855210293] [2021-06-05 03:52:07,096 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:52:07,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:07,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:52:07,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:52:07,097 INFO L87 Difference]: Start difference. First operand 10472 states and 27643 transitions. Second operand has 16 states, 16 states have (on average 4.625) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:07,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:07,367 INFO L93 Difference]: Finished difference Result 12244 states and 30811 transitions. [2021-06-05 03:52:07,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 03:52:07,367 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.625) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 03:52:07,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:07,380 INFO L225 Difference]: With dead ends: 12244 [2021-06-05 03:52:07,381 INFO L226 Difference]: Without dead ends: 12226 [2021-06-05 03:52:07,381 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 94.4ms TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:52:07,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12226 states. [2021-06-05 03:52:07,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12226 to 10472. [2021-06-05 03:52:07,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10472 states, 10471 states have (on average 2.6376659344857223) internal successors, (27619), 10471 states have internal predecessors, (27619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:07,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10472 states to 10472 states and 27619 transitions. [2021-06-05 03:52:07,560 INFO L78 Accepts]: Start accepts. Automaton has 10472 states and 27619 transitions. Word has length 53 [2021-06-05 03:52:07,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:07,560 INFO L482 AbstractCegarLoop]: Abstraction has 10472 states and 27619 transitions. [2021-06-05 03:52:07,561 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.625) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:07,561 INFO L276 IsEmpty]: Start isEmpty. Operand 10472 states and 27619 transitions. [2021-06-05 03:52:07,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 03:52:07,569 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:07,569 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:07,769 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable601,299 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:07,769 INFO L430 AbstractCegarLoop]: === Iteration 308 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:07,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:07,769 INFO L82 PathProgramCache]: Analyzing trace with hash 97108458, now seen corresponding path program 168 times [2021-06-05 03:52:07,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:07,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47621685] [2021-06-05 03:52:07,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:07,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:07,842 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 18 proven. 113 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:52:07,843 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:07,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47621685] [2021-06-05 03:52:07,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47621685] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:07,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022054527] [2021-06-05 03:52:07,843 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:07,872 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-06-05 03:52:07,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:52:07,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 03:52:07,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:07,956 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 13 proven. 118 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:52:07,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022054527] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:07,956 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:07,956 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 03:52:07,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042961891] [2021-06-05 03:52:07,956 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 03:52:07,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:07,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 03:52:07,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-05 03:52:07,956 INFO L87 Difference]: Start difference. First operand 10472 states and 27619 transitions. Second operand has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:08,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:08,500 INFO L93 Difference]: Finished difference Result 11210 states and 28930 transitions. [2021-06-05 03:52:08,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 03:52:08,501 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 03:52:08,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:08,512 INFO L225 Difference]: With dead ends: 11210 [2021-06-05 03:52:08,512 INFO L226 Difference]: Without dead ends: 11154 [2021-06-05 03:52:08,512 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 114.7ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:52:08,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11154 states. [2021-06-05 03:52:08,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11154 to 10444. [2021-06-05 03:52:08,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10444 states, 10443 states have (on average 2.63497079383319) internal successors, (27517), 10443 states have internal predecessors, (27517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:08,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10444 states to 10444 states and 27517 transitions. [2021-06-05 03:52:08,634 INFO L78 Accepts]: Start accepts. Automaton has 10444 states and 27517 transitions. Word has length 53 [2021-06-05 03:52:08,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:08,634 INFO L482 AbstractCegarLoop]: Abstraction has 10444 states and 27517 transitions. [2021-06-05 03:52:08,634 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:08,634 INFO L276 IsEmpty]: Start isEmpty. Operand 10444 states and 27517 transitions. [2021-06-05 03:52:08,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 03:52:08,641 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:08,642 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:08,842 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable604 [2021-06-05 03:52:08,842 INFO L430 AbstractCegarLoop]: === Iteration 309 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:08,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:08,842 INFO L82 PathProgramCache]: Analyzing trace with hash -516427722, now seen corresponding path program 169 times [2021-06-05 03:52:08,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:08,842 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540531265] [2021-06-05 03:52:08,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:08,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:08,917 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 114 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 03:52:08,918 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:08,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540531265] [2021-06-05 03:52:08,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540531265] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:08,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702639122] [2021-06-05 03:52:08,918 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:08,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:08,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 03:52:08,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:09,014 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 115 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 03:52:09,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702639122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:09,015 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:09,015 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 03:52:09,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302729645] [2021-06-05 03:52:09,015 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 03:52:09,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:09,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 03:52:09,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-05 03:52:09,015 INFO L87 Difference]: Start difference. First operand 10444 states and 27517 transitions. Second operand has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:09,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:09,421 INFO L93 Difference]: Finished difference Result 11584 states and 29771 transitions. [2021-06-05 03:52:09,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 03:52:09,422 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 03:52:09,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:09,433 INFO L225 Difference]: With dead ends: 11584 [2021-06-05 03:52:09,433 INFO L226 Difference]: Without dead ends: 11572 [2021-06-05 03:52:09,433 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 115.0ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:52:09,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11572 states. [2021-06-05 03:52:09,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11572 to 10490. [2021-06-05 03:52:09,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10490 states, 10489 states have (on average 2.6332348174277813) internal successors, (27620), 10489 states have internal predecessors, (27620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:09,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10490 states to 10490 states and 27620 transitions. [2021-06-05 03:52:09,557 INFO L78 Accepts]: Start accepts. Automaton has 10490 states and 27620 transitions. Word has length 53 [2021-06-05 03:52:09,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:09,558 INFO L482 AbstractCegarLoop]: Abstraction has 10490 states and 27620 transitions. [2021-06-05 03:52:09,558 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:09,558 INFO L276 IsEmpty]: Start isEmpty. Operand 10490 states and 27620 transitions. [2021-06-05 03:52:09,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 03:52:09,564 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:09,564 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:09,765 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable605,301 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:09,765 INFO L430 AbstractCegarLoop]: === Iteration 310 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:09,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:09,765 INFO L82 PathProgramCache]: Analyzing trace with hash 1625489612, now seen corresponding path program 170 times [2021-06-05 03:52:09,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:09,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375774163] [2021-06-05 03:52:09,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:09,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:09,842 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 116 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:52:09,842 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:09,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375774163] [2021-06-05 03:52:09,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375774163] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:09,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66573477] [2021-06-05 03:52:09,842 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:09,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:52:09,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:52:09,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 03:52:09,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:09,939 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 117 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:52:09,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66573477] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:09,939 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:09,939 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 03:52:09,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706471655] [2021-06-05 03:52:09,939 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 03:52:09,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:09,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 03:52:09,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:52:09,939 INFO L87 Difference]: Start difference. First operand 10490 states and 27620 transitions. Second operand has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:10,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:10,443 INFO L93 Difference]: Finished difference Result 12749 states and 32307 transitions. [2021-06-05 03:52:10,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 03:52:10,443 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 03:52:10,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:10,455 INFO L225 Difference]: With dead ends: 12749 [2021-06-05 03:52:10,455 INFO L226 Difference]: Without dead ends: 12707 [2021-06-05 03:52:10,455 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 180.9ms TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-06-05 03:52:10,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12707 states. [2021-06-05 03:52:10,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12707 to 10549. [2021-06-05 03:52:10,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10549 states, 10548 states have (on average 2.6331058020477816) internal successors, (27774), 10548 states have internal predecessors, (27774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:10,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10549 states to 10549 states and 27774 transitions. [2021-06-05 03:52:10,589 INFO L78 Accepts]: Start accepts. Automaton has 10549 states and 27774 transitions. Word has length 53 [2021-06-05 03:52:10,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:10,589 INFO L482 AbstractCegarLoop]: Abstraction has 10549 states and 27774 transitions. [2021-06-05 03:52:10,589 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:10,589 INFO L276 IsEmpty]: Start isEmpty. Operand 10549 states and 27774 transitions. [2021-06-05 03:52:10,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 03:52:10,596 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:10,596 INFO L521 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:10,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable606,302 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:10,797 INFO L430 AbstractCegarLoop]: === Iteration 311 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:10,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:10,797 INFO L82 PathProgramCache]: Analyzing trace with hash -1136918575, now seen corresponding path program 171 times [2021-06-05 03:52:10,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:10,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893384708] [2021-06-05 03:52:10,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:10,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:10,858 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 46 proven. 88 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:52:10,858 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:10,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893384708] [2021-06-05 03:52:10,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893384708] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:10,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613430377] [2021-06-05 03:52:10,858 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:10,887 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 03:52:10,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:52:10,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 03:52:10,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:10,957 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 46 proven. 88 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:52:10,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613430377] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:10,957 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:10,957 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 03:52:10,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782896343] [2021-06-05 03:52:10,958 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 03:52:10,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:10,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 03:52:10,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:52:10,958 INFO L87 Difference]: Start difference. First operand 10549 states and 27774 transitions. Second operand has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:11,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:11,159 INFO L93 Difference]: Finished difference Result 12080 states and 30433 transitions. [2021-06-05 03:52:11,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 03:52:11,159 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 03:52:11,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:11,170 INFO L225 Difference]: With dead ends: 12080 [2021-06-05 03:52:11,171 INFO L226 Difference]: Without dead ends: 12056 [2021-06-05 03:52:11,171 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 72.0ms TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:52:11,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12056 states. [2021-06-05 03:52:11,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12056 to 10182. [2021-06-05 03:52:11,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10182 states, 10181 states have (on average 2.6232197230134564) internal successors, (26707), 10181 states have internal predecessors, (26707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:11,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10182 states to 10182 states and 26707 transitions. [2021-06-05 03:52:11,293 INFO L78 Accepts]: Start accepts. Automaton has 10182 states and 26707 transitions. Word has length 53 [2021-06-05 03:52:11,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:11,293 INFO L482 AbstractCegarLoop]: Abstraction has 10182 states and 26707 transitions. [2021-06-05 03:52:11,293 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:11,293 INFO L276 IsEmpty]: Start isEmpty. Operand 10182 states and 26707 transitions. [2021-06-05 03:52:11,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 03:52:11,300 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:11,300 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:11,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable607,303 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:11,501 INFO L430 AbstractCegarLoop]: === Iteration 312 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:11,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:11,501 INFO L82 PathProgramCache]: Analyzing trace with hash 1780326146, now seen corresponding path program 172 times [2021-06-05 03:52:11,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:11,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048672755] [2021-06-05 03:52:11,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:11,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:11,589 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 119 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:52:11,589 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:11,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048672755] [2021-06-05 03:52:11,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048672755] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:11,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631047801] [2021-06-05 03:52:11,589 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:11,615 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:52:11,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:52:11,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 03:52:11,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:11,687 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 119 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:52:11,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631047801] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:11,688 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:11,688 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 03:52:11,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625322613] [2021-06-05 03:52:11,688 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 03:52:11,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:11,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 03:52:11,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:52:11,688 INFO L87 Difference]: Start difference. First operand 10182 states and 26707 transitions. Second operand has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:12,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:12,238 INFO L93 Difference]: Finished difference Result 12810 states and 32153 transitions. [2021-06-05 03:52:12,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 03:52:12,238 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 03:52:12,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:12,251 INFO L225 Difference]: With dead ends: 12810 [2021-06-05 03:52:12,251 INFO L226 Difference]: Without dead ends: 12756 [2021-06-05 03:52:12,251 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 172.9ms TimeCoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-06-05 03:52:12,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12756 states. [2021-06-05 03:52:12,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12756 to 10143. [2021-06-05 03:52:12,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10143 states, 10142 states have (on average 2.620291855649773) internal successors, (26575), 10142 states have internal predecessors, (26575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:12,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10143 states to 10143 states and 26575 transitions. [2021-06-05 03:52:12,380 INFO L78 Accepts]: Start accepts. Automaton has 10143 states and 26575 transitions. Word has length 53 [2021-06-05 03:52:12,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:12,381 INFO L482 AbstractCegarLoop]: Abstraction has 10143 states and 26575 transitions. [2021-06-05 03:52:12,381 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:12,381 INFO L276 IsEmpty]: Start isEmpty. Operand 10143 states and 26575 transitions. [2021-06-05 03:52:12,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 03:52:12,388 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:12,388 INFO L521 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:12,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 304 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable611 [2021-06-05 03:52:12,589 INFO L430 AbstractCegarLoop]: === Iteration 313 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:12,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:12,589 INFO L82 PathProgramCache]: Analyzing trace with hash 1542264629, now seen corresponding path program 82 times [2021-06-05 03:52:12,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:12,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732288387] [2021-06-05 03:52:12,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:12,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:12,685 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 97 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:52:12,685 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:12,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732288387] [2021-06-05 03:52:12,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732288387] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:12,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355653537] [2021-06-05 03:52:12,685 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:12,710 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:52:12,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:52:12,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 03:52:12,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:12,783 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 98 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:12,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355653537] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:12,784 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:12,784 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 11 [2021-06-05 03:52:12,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769571889] [2021-06-05 03:52:12,784 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 03:52:12,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:12,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 03:52:12,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:52:12,784 INFO L87 Difference]: Start difference. First operand 10143 states and 26575 transitions. Second operand has 12 states, 12 states have (on average 4.75) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:12,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:12,949 INFO L93 Difference]: Finished difference Result 13236 states and 32994 transitions. [2021-06-05 03:52:12,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 03:52:12,949 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 03:52:12,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:12,963 INFO L225 Difference]: With dead ends: 13236 [2021-06-05 03:52:12,963 INFO L226 Difference]: Without dead ends: 13222 [2021-06-05 03:52:12,963 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 60.5ms TimeCoverageRelationStatistics Valid=75, Invalid=107, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:52:12,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13222 states. [2021-06-05 03:52:13,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13222 to 10426. [2021-06-05 03:52:13,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10426 states, 10425 states have (on average 2.6276258992805754) internal successors, (27393), 10425 states have internal predecessors, (27393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:13,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10426 states to 10426 states and 27393 transitions. [2021-06-05 03:52:13,100 INFO L78 Accepts]: Start accepts. Automaton has 10426 states and 27393 transitions. Word has length 53 [2021-06-05 03:52:13,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:13,100 INFO L482 AbstractCegarLoop]: Abstraction has 10426 states and 27393 transitions. [2021-06-05 03:52:13,100 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:13,101 INFO L276 IsEmpty]: Start isEmpty. Operand 10426 states and 27393 transitions. [2021-06-05 03:52:13,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 03:52:13,108 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:13,108 INFO L521 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:13,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable612 [2021-06-05 03:52:13,308 INFO L430 AbstractCegarLoop]: === Iteration 314 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:13,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:13,309 INFO L82 PathProgramCache]: Analyzing trace with hash 920384219, now seen corresponding path program 83 times [2021-06-05 03:52:13,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:13,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105144985] [2021-06-05 03:52:13,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:13,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:13,362 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 97 proven. 37 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:52:13,362 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:13,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105144985] [2021-06-05 03:52:13,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105144985] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:13,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393800577] [2021-06-05 03:52:13,362 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:13,392 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-06-05 03:52:13,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:52:13,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 03:52:13,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:13,519 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 99 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:13,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393800577] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:13,519 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:13,519 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 16] total 18 [2021-06-05 03:52:13,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194229182] [2021-06-05 03:52:13,519 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:52:13,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:13,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:52:13,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=215, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:52:13,520 INFO L87 Difference]: Start difference. First operand 10426 states and 27393 transitions. Second operand has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 18 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:13,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:13,846 INFO L93 Difference]: Finished difference Result 16570 states and 40721 transitions. [2021-06-05 03:52:13,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 03:52:13,846 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 18 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 03:52:13,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:13,863 INFO L225 Difference]: With dead ends: 16570 [2021-06-05 03:52:13,864 INFO L226 Difference]: Without dead ends: 16570 [2021-06-05 03:52:13,864 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 172.7ms TimeCoverageRelationStatistics Valid=240, Invalid=360, Unknown=0, NotChecked=0, Total=600 [2021-06-05 03:52:13,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16570 states. [2021-06-05 03:52:13,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16570 to 10440. [2021-06-05 03:52:13,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10440 states, 10439 states have (on average 2.627646326276463) internal successors, (27430), 10439 states have internal predecessors, (27430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:14,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10440 states to 10440 states and 27430 transitions. [2021-06-05 03:52:14,015 INFO L78 Accepts]: Start accepts. Automaton has 10440 states and 27430 transitions. Word has length 53 [2021-06-05 03:52:14,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:14,015 INFO L482 AbstractCegarLoop]: Abstraction has 10440 states and 27430 transitions. [2021-06-05 03:52:14,015 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 18 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:14,015 INFO L276 IsEmpty]: Start isEmpty. Operand 10440 states and 27430 transitions. [2021-06-05 03:52:14,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 03:52:14,023 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:14,023 INFO L521 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:14,223 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable614,306 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:14,223 INFO L430 AbstractCegarLoop]: === Iteration 315 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:14,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:14,223 INFO L82 PathProgramCache]: Analyzing trace with hash -717188237, now seen corresponding path program 84 times [2021-06-05 03:52:14,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:14,224 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977949275] [2021-06-05 03:52:14,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:14,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:14,285 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 94 proven. 40 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:52:14,286 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:14,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977949275] [2021-06-05 03:52:14,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977949275] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:14,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855779400] [2021-06-05 03:52:14,286 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:14,315 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-06-05 03:52:14,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:52:14,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 03:52:14,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:14,407 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 104 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:52:14,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855779400] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:14,407 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:14,407 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 14 [2021-06-05 03:52:14,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937331453] [2021-06-05 03:52:14,407 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 03:52:14,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:14,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 03:52:14,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=131, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:52:14,408 INFO L87 Difference]: Start difference. First operand 10440 states and 27430 transitions. Second operand has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:14,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:14,660 INFO L93 Difference]: Finished difference Result 13184 states and 32800 transitions. [2021-06-05 03:52:14,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 03:52:14,660 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 03:52:14,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:14,674 INFO L225 Difference]: With dead ends: 13184 [2021-06-05 03:52:14,674 INFO L226 Difference]: Without dead ends: 13184 [2021-06-05 03:52:14,674 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 100.1ms TimeCoverageRelationStatistics Valid=122, Invalid=184, Unknown=0, NotChecked=0, Total=306 [2021-06-05 03:52:14,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13184 states. [2021-06-05 03:52:14,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13184 to 10216. [2021-06-05 03:52:14,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10216 states, 10215 states have (on average 2.6215369554576604) internal successors, (26779), 10215 states have internal predecessors, (26779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:14,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10216 states to 10216 states and 26779 transitions. [2021-06-05 03:52:14,826 INFO L78 Accepts]: Start accepts. Automaton has 10216 states and 26779 transitions. Word has length 53 [2021-06-05 03:52:14,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:14,826 INFO L482 AbstractCegarLoop]: Abstraction has 10216 states and 26779 transitions. [2021-06-05 03:52:14,826 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:14,827 INFO L276 IsEmpty]: Start isEmpty. Operand 10216 states and 26779 transitions. [2021-06-05 03:52:14,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 03:52:14,833 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:14,833 INFO L521 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:15,034 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 307 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable615 [2021-06-05 03:52:15,034 INFO L430 AbstractCegarLoop]: === Iteration 316 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:15,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:15,034 INFO L82 PathProgramCache]: Analyzing trace with hash -2128038473, now seen corresponding path program 173 times [2021-06-05 03:52:15,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:15,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408983630] [2021-06-05 03:52:15,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:15,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:15,116 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 51 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:52:15,116 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:15,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408983630] [2021-06-05 03:52:15,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408983630] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:15,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715709220] [2021-06-05 03:52:15,117 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:15,147 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 03:52:15,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:52:15,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 03:52:15,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:15,250 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 52 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:15,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715709220] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:15,250 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:15,250 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 17 [2021-06-05 03:52:15,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355704223] [2021-06-05 03:52:15,250 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 03:52:15,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:15,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 03:52:15,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2021-06-05 03:52:15,251 INFO L87 Difference]: Start difference. First operand 10216 states and 26779 transitions. Second operand has 18 states, 18 states have (on average 4.222222222222222) internal successors, (76), 17 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:15,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:15,516 INFO L93 Difference]: Finished difference Result 11730 states and 29482 transitions. [2021-06-05 03:52:15,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 03:52:15,516 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.222222222222222) internal successors, (76), 17 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 03:52:15,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:15,528 INFO L225 Difference]: With dead ends: 11730 [2021-06-05 03:52:15,528 INFO L226 Difference]: Without dead ends: 11703 [2021-06-05 03:52:15,528 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 123.3ms TimeCoverageRelationStatistics Valid=121, Invalid=341, Unknown=0, NotChecked=0, Total=462 [2021-06-05 03:52:15,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11703 states. [2021-06-05 03:52:15,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11703 to 10216. [2021-06-05 03:52:15,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10216 states, 10215 states have (on average 2.6206558981889376) internal successors, (26770), 10215 states have internal predecessors, (26770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:15,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10216 states to 10216 states and 26770 transitions. [2021-06-05 03:52:15,648 INFO L78 Accepts]: Start accepts. Automaton has 10216 states and 26770 transitions. Word has length 53 [2021-06-05 03:52:15,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:15,648 INFO L482 AbstractCegarLoop]: Abstraction has 10216 states and 26770 transitions. [2021-06-05 03:52:15,649 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.222222222222222) internal successors, (76), 17 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:15,649 INFO L276 IsEmpty]: Start isEmpty. Operand 10216 states and 26770 transitions. [2021-06-05 03:52:15,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 03:52:15,655 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:15,655 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:15,856 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable618,308 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:15,856 INFO L430 AbstractCegarLoop]: === Iteration 317 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:15,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:15,856 INFO L82 PathProgramCache]: Analyzing trace with hash -174590330, now seen corresponding path program 85 times [2021-06-05 03:52:15,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:15,856 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409002255] [2021-06-05 03:52:15,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:15,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:15,931 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 8 proven. 123 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:52:15,932 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:15,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409002255] [2021-06-05 03:52:15,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409002255] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:15,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075790334] [2021-06-05 03:52:15,932 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:15,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:15,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 03:52:15,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:16,030 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 124 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:52:16,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075790334] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:16,030 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:16,030 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 03:52:16,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898362326] [2021-06-05 03:52:16,030 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 03:52:16,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:16,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 03:52:16,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-05 03:52:16,031 INFO L87 Difference]: Start difference. First operand 10216 states and 26770 transitions. Second operand has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:16,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:16,416 INFO L93 Difference]: Finished difference Result 11688 states and 29696 transitions. [2021-06-05 03:52:16,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 03:52:16,416 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 03:52:16,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:16,429 INFO L225 Difference]: With dead ends: 11688 [2021-06-05 03:52:16,429 INFO L226 Difference]: Without dead ends: 11657 [2021-06-05 03:52:16,429 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 116.1ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:52:16,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11657 states. [2021-06-05 03:52:16,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11657 to 10380. [2021-06-05 03:52:16,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10380 states, 10379 states have (on average 2.618653049426727) internal successors, (27179), 10379 states have internal predecessors, (27179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:16,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10380 states to 10380 states and 27179 transitions. [2021-06-05 03:52:16,557 INFO L78 Accepts]: Start accepts. Automaton has 10380 states and 27179 transitions. Word has length 53 [2021-06-05 03:52:16,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:16,557 INFO L482 AbstractCegarLoop]: Abstraction has 10380 states and 27179 transitions. [2021-06-05 03:52:16,558 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:16,558 INFO L276 IsEmpty]: Start isEmpty. Operand 10380 states and 27179 transitions. [2021-06-05 03:52:16,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 03:52:16,565 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:16,565 INFO L521 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:16,765 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 309 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable623 [2021-06-05 03:52:16,765 INFO L430 AbstractCegarLoop]: === Iteration 318 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:16,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:16,765 INFO L82 PathProgramCache]: Analyzing trace with hash -1728287187, now seen corresponding path program 174 times [2021-06-05 03:52:16,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:16,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594044898] [2021-06-05 03:52:16,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:16,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:16,812 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 48 proven. 83 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 03:52:16,812 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:16,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594044898] [2021-06-05 03:52:16,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594044898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:16,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030621186] [2021-06-05 03:52:16,812 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:16,841 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-06-05 03:52:16,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:52:16,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 03:52:16,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:16,908 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 48 proven. 83 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 03:52:16,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030621186] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:16,909 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:16,909 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 03:52:16,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385365310] [2021-06-05 03:52:16,909 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 03:52:16,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:16,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 03:52:16,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-06-05 03:52:16,909 INFO L87 Difference]: Start difference. First operand 10380 states and 27179 transitions. Second operand has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:17,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:17,044 INFO L93 Difference]: Finished difference Result 12057 states and 30158 transitions. [2021-06-05 03:52:17,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 03:52:17,045 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 03:52:17,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:17,056 INFO L225 Difference]: With dead ends: 12057 [2021-06-05 03:52:17,056 INFO L226 Difference]: Without dead ends: 12054 [2021-06-05 03:52:17,057 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 42.2ms TimeCoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-06-05 03:52:17,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12054 states. [2021-06-05 03:52:17,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12054 to 10366. [2021-06-05 03:52:17,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10366 states, 10365 states have (on average 2.6167872648335746) internal successors, (27123), 10365 states have internal predecessors, (27123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:17,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10366 states to 10366 states and 27123 transitions. [2021-06-05 03:52:17,209 INFO L78 Accepts]: Start accepts. Automaton has 10366 states and 27123 transitions. Word has length 53 [2021-06-05 03:52:17,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:17,209 INFO L482 AbstractCegarLoop]: Abstraction has 10366 states and 27123 transitions. [2021-06-05 03:52:17,209 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:17,210 INFO L276 IsEmpty]: Start isEmpty. Operand 10366 states and 27123 transitions. [2021-06-05 03:52:17,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 03:52:17,217 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:17,217 INFO L521 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:17,417 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 310 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable624 [2021-06-05 03:52:17,418 INFO L430 AbstractCegarLoop]: === Iteration 319 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:17,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:17,418 INFO L82 PathProgramCache]: Analyzing trace with hash -1521224621, now seen corresponding path program 175 times [2021-06-05 03:52:17,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:17,418 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540340205] [2021-06-05 03:52:17,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:17,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:17,471 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 43 proven. 88 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 03:52:17,471 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:17,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540340205] [2021-06-05 03:52:17,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540340205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:17,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417811324] [2021-06-05 03:52:17,471 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:17,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:17,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 03:52:17,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:17,567 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 43 proven. 88 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 03:52:17,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417811324] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:17,567 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:17,567 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 03:52:17,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128361440] [2021-06-05 03:52:17,567 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 03:52:17,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:17,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 03:52:17,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-06-05 03:52:17,568 INFO L87 Difference]: Start difference. First operand 10366 states and 27123 transitions. Second operand has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:17,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:17,723 INFO L93 Difference]: Finished difference Result 12079 states and 30151 transitions. [2021-06-05 03:52:17,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 03:52:17,723 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 03:52:17,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:17,734 INFO L225 Difference]: With dead ends: 12079 [2021-06-05 03:52:17,735 INFO L226 Difference]: Without dead ends: 12061 [2021-06-05 03:52:17,735 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 63.1ms TimeCoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:52:17,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12061 states. [2021-06-05 03:52:17,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12061 to 10366. [2021-06-05 03:52:17,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10366 states, 10365 states have (on average 2.6144717800289436) internal successors, (27099), 10365 states have internal predecessors, (27099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:17,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10366 states to 10366 states and 27099 transitions. [2021-06-05 03:52:17,866 INFO L78 Accepts]: Start accepts. Automaton has 10366 states and 27099 transitions. Word has length 53 [2021-06-05 03:52:17,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:17,867 INFO L482 AbstractCegarLoop]: Abstraction has 10366 states and 27099 transitions. [2021-06-05 03:52:17,867 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:17,867 INFO L276 IsEmpty]: Start isEmpty. Operand 10366 states and 27099 transitions. [2021-06-05 03:52:17,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 03:52:17,874 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:17,874 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:18,074 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable626,311 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:18,075 INFO L430 AbstractCegarLoop]: === Iteration 320 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:18,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:18,075 INFO L82 PathProgramCache]: Analyzing trace with hash 1325742662, now seen corresponding path program 176 times [2021-06-05 03:52:18,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:18,075 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183244384] [2021-06-05 03:52:18,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:18,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:18,144 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 18 proven. 113 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:52:18,144 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:18,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183244384] [2021-06-05 03:52:18,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183244384] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:18,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29059615] [2021-06-05 03:52:18,144 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:18,170 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:52:18,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:52:18,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 03:52:18,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:18,251 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 13 proven. 118 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:52:18,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29059615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:18,251 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:18,251 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 03:52:18,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024878888] [2021-06-05 03:52:18,251 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 03:52:18,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:18,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 03:52:18,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-05 03:52:18,252 INFO L87 Difference]: Start difference. First operand 10366 states and 27099 transitions. Second operand has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:18,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:18,797 INFO L93 Difference]: Finished difference Result 11156 states and 28494 transitions. [2021-06-05 03:52:18,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 03:52:18,798 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 03:52:18,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:18,808 INFO L225 Difference]: With dead ends: 11156 [2021-06-05 03:52:18,808 INFO L226 Difference]: Without dead ends: 11082 [2021-06-05 03:52:18,809 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 114.0ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:52:18,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11082 states. [2021-06-05 03:52:18,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11082 to 10344. [2021-06-05 03:52:18,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10344 states, 10343 states have (on average 2.61026781398047) internal successors, (26998), 10343 states have internal predecessors, (26998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:18,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10344 states to 10344 states and 26998 transitions. [2021-06-05 03:52:18,925 INFO L78 Accepts]: Start accepts. Automaton has 10344 states and 26998 transitions. Word has length 53 [2021-06-05 03:52:18,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:18,925 INFO L482 AbstractCegarLoop]: Abstraction has 10344 states and 26998 transitions. [2021-06-05 03:52:18,925 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:18,925 INFO L276 IsEmpty]: Start isEmpty. Operand 10344 states and 26998 transitions. [2021-06-05 03:52:18,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 03:52:18,932 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:18,932 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:19,133 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable629,312 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:19,133 INFO L430 AbstractCegarLoop]: === Iteration 321 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:19,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:19,133 INFO L82 PathProgramCache]: Analyzing trace with hash 712206482, now seen corresponding path program 177 times [2021-06-05 03:52:19,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:19,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915655765] [2021-06-05 03:52:19,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:19,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:19,211 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 114 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 03:52:19,211 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:19,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915655765] [2021-06-05 03:52:19,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915655765] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:19,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499894962] [2021-06-05 03:52:19,211 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:19,241 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-06-05 03:52:19,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:52:19,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 03:52:19,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:19,312 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 115 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 03:52:19,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499894962] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:19,312 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:19,312 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 03:52:19,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331955767] [2021-06-05 03:52:19,313 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 03:52:19,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:19,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 03:52:19,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-05 03:52:19,313 INFO L87 Difference]: Start difference. First operand 10344 states and 26998 transitions. Second operand has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:19,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:19,710 INFO L93 Difference]: Finished difference Result 11598 states and 29476 transitions. [2021-06-05 03:52:19,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 03:52:19,711 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 03:52:19,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:19,720 INFO L225 Difference]: With dead ends: 11598 [2021-06-05 03:52:19,720 INFO L226 Difference]: Without dead ends: 11586 [2021-06-05 03:52:19,721 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 115.4ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:52:19,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11586 states. [2021-06-05 03:52:19,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11586 to 10414. [2021-06-05 03:52:19,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10414 states, 10413 states have (on average 2.6087582829155864) internal successors, (27165), 10413 states have internal predecessors, (27165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:19,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10414 states to 10414 states and 27165 transitions. [2021-06-05 03:52:19,835 INFO L78 Accepts]: Start accepts. Automaton has 10414 states and 27165 transitions. Word has length 53 [2021-06-05 03:52:19,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:19,835 INFO L482 AbstractCegarLoop]: Abstraction has 10414 states and 27165 transitions. [2021-06-05 03:52:19,835 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:19,835 INFO L276 IsEmpty]: Start isEmpty. Operand 10414 states and 27165 transitions. [2021-06-05 03:52:19,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 03:52:19,842 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:19,842 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:20,042 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 313 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable630 [2021-06-05 03:52:20,043 INFO L430 AbstractCegarLoop]: === Iteration 322 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:20,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:20,043 INFO L82 PathProgramCache]: Analyzing trace with hash -1440843480, now seen corresponding path program 178 times [2021-06-05 03:52:20,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:20,043 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893687697] [2021-06-05 03:52:20,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:20,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:20,116 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 116 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:52:20,116 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:20,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893687697] [2021-06-05 03:52:20,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893687697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:20,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483395238] [2021-06-05 03:52:20,116 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:20,142 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:52:20,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:52:20,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 03:52:20,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:20,212 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 117 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:52:20,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483395238] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:20,212 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:20,213 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 03:52:20,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490246867] [2021-06-05 03:52:20,213 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 03:52:20,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:20,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 03:52:20,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:52:20,213 INFO L87 Difference]: Start difference. First operand 10414 states and 27165 transitions. Second operand has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:20,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:20,760 INFO L93 Difference]: Finished difference Result 13130 states and 32846 transitions. [2021-06-05 03:52:20,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 03:52:20,760 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 03:52:20,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:20,773 INFO L225 Difference]: With dead ends: 13130 [2021-06-05 03:52:20,773 INFO L226 Difference]: Without dead ends: 13076 [2021-06-05 03:52:20,773 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 172.1ms TimeCoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2021-06-05 03:52:20,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13076 states. [2021-06-05 03:52:20,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13076 to 10595. [2021-06-05 03:52:20,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10595 states, 10594 states have (on average 2.60911836888805) internal successors, (27641), 10594 states have internal predecessors, (27641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:20,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10595 states to 10595 states and 27641 transitions. [2021-06-05 03:52:20,902 INFO L78 Accepts]: Start accepts. Automaton has 10595 states and 27641 transitions. Word has length 53 [2021-06-05 03:52:20,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:20,902 INFO L482 AbstractCegarLoop]: Abstraction has 10595 states and 27641 transitions. [2021-06-05 03:52:20,902 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:20,902 INFO L276 IsEmpty]: Start isEmpty. Operand 10595 states and 27641 transitions. [2021-06-05 03:52:20,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 03:52:20,909 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:20,909 INFO L521 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:21,110 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 314 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable631 [2021-06-05 03:52:21,110 INFO L430 AbstractCegarLoop]: === Iteration 323 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:21,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:21,110 INFO L82 PathProgramCache]: Analyzing trace with hash 91715629, now seen corresponding path program 179 times [2021-06-05 03:52:21,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:21,110 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942188550] [2021-06-05 03:52:21,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:21,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:21,170 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 38 proven. 96 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:52:21,171 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:21,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942188550] [2021-06-05 03:52:21,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942188550] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:21,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181232608] [2021-06-05 03:52:21,171 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:21,199 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-05 03:52:21,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:52:21,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 03:52:21,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:21,288 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 39 proven. 96 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:52:21,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181232608] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:21,288 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:21,288 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 15 [2021-06-05 03:52:21,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865907914] [2021-06-05 03:52:21,288 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:52:21,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:21,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:52:21,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:52:21,289 INFO L87 Difference]: Start difference. First operand 10595 states and 27641 transitions. Second operand has 16 states, 16 states have (on average 4.5625) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:21,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:21,528 INFO L93 Difference]: Finished difference Result 12473 states and 30997 transitions. [2021-06-05 03:52:21,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 03:52:21,529 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.5625) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 03:52:21,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:21,541 INFO L225 Difference]: With dead ends: 12473 [2021-06-05 03:52:21,541 INFO L226 Difference]: Without dead ends: 12449 [2021-06-05 03:52:21,541 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 94.9ms TimeCoverageRelationStatistics Valid=98, Invalid=244, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:52:21,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12449 states. [2021-06-05 03:52:21,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12449 to 10595. [2021-06-05 03:52:21,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10595 states, 10594 states have (on average 2.6075136869926374) internal successors, (27624), 10594 states have internal predecessors, (27624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:21,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10595 states to 10595 states and 27624 transitions. [2021-06-05 03:52:21,676 INFO L78 Accepts]: Start accepts. Automaton has 10595 states and 27624 transitions. Word has length 53 [2021-06-05 03:52:21,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:21,676 INFO L482 AbstractCegarLoop]: Abstraction has 10595 states and 27624 transitions. [2021-06-05 03:52:21,676 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.5625) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:21,676 INFO L276 IsEmpty]: Start isEmpty. Operand 10595 states and 27624 transitions. [2021-06-05 03:52:21,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 03:52:21,683 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:21,683 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:21,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable632,315 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:21,884 INFO L430 AbstractCegarLoop]: === Iteration 324 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:21,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:21,884 INFO L82 PathProgramCache]: Analyzing trace with hash -1286006946, now seen corresponding path program 180 times [2021-06-05 03:52:21,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:21,884 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700423921] [2021-06-05 03:52:21,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:21,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:21,966 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 116 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:52:21,966 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:21,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700423921] [2021-06-05 03:52:21,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700423921] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:21,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018813757] [2021-06-05 03:52:21,966 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:22,038 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-06-05 03:52:22,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:52:22,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 03:52:22,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:22,108 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 117 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:52:22,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018813757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:22,108 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:22,108 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 03:52:22,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565821261] [2021-06-05 03:52:22,109 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 03:52:22,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:22,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 03:52:22,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:52:22,109 INFO L87 Difference]: Start difference. First operand 10595 states and 27624 transitions. Second operand has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:22,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:22,791 INFO L93 Difference]: Finished difference Result 15502 states and 38128 transitions. [2021-06-05 03:52:22,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 03:52:22,791 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 03:52:22,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:22,807 INFO L225 Difference]: With dead ends: 15502 [2021-06-05 03:52:22,807 INFO L226 Difference]: Without dead ends: 15388 [2021-06-05 03:52:22,807 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 288.1ms TimeCoverageRelationStatistics Valid=177, Invalid=1155, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 03:52:22,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15388 states. [2021-06-05 03:52:22,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15388 to 10752. [2021-06-05 03:52:22,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10752 states, 10751 states have (on average 2.607943447121198) internal successors, (28038), 10751 states have internal predecessors, (28038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:22,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10752 states to 10752 states and 28038 transitions. [2021-06-05 03:52:22,949 INFO L78 Accepts]: Start accepts. Automaton has 10752 states and 28038 transitions. Word has length 53 [2021-06-05 03:52:22,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:22,949 INFO L482 AbstractCegarLoop]: Abstraction has 10752 states and 28038 transitions. [2021-06-05 03:52:22,949 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:22,949 INFO L276 IsEmpty]: Start isEmpty. Operand 10752 states and 28038 transitions. [2021-06-05 03:52:22,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 03:52:22,956 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:22,957 INFO L521 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:23,157 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable636,316 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:23,157 INFO L430 AbstractCegarLoop]: === Iteration 325 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:23,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:23,157 INFO L82 PathProgramCache]: Analyzing trace with hash -899404269, now seen corresponding path program 181 times [2021-06-05 03:52:23,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:23,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729093154] [2021-06-05 03:52:23,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:23,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:23,226 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 39 proven. 95 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:52:23,227 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:23,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729093154] [2021-06-05 03:52:23,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729093154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:23,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023454979] [2021-06-05 03:52:23,227 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:23,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:23,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 03:52:23,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:23,322 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 39 proven. 95 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:52:23,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023454979] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:23,323 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:23,323 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-06-05 03:52:23,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170283308] [2021-06-05 03:52:23,323 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 03:52:23,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:23,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 03:52:23,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:52:23,323 INFO L87 Difference]: Start difference. First operand 10752 states and 28038 transitions. Second operand has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:23,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:23,530 INFO L93 Difference]: Finished difference Result 12521 states and 31155 transitions. [2021-06-05 03:52:23,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 03:52:23,531 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 03:52:23,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:23,544 INFO L225 Difference]: With dead ends: 12521 [2021-06-05 03:52:23,544 INFO L226 Difference]: Without dead ends: 12488 [2021-06-05 03:52:23,544 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 88.0ms TimeCoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:52:23,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12488 states. [2021-06-05 03:52:23,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12488 to 10400. [2021-06-05 03:52:23,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10400 states, 10399 states have (on average 2.5997692085777477) internal successors, (27035), 10399 states have internal predecessors, (27035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:23,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10400 states to 10400 states and 27035 transitions. [2021-06-05 03:52:23,672 INFO L78 Accepts]: Start accepts. Automaton has 10400 states and 27035 transitions. Word has length 53 [2021-06-05 03:52:23,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:23,672 INFO L482 AbstractCegarLoop]: Abstraction has 10400 states and 27035 transitions. [2021-06-05 03:52:23,672 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:23,672 INFO L276 IsEmpty]: Start isEmpty. Operand 10400 states and 27035 transitions. [2021-06-05 03:52:23,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 03:52:23,679 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:23,679 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:23,879 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable637,317 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:23,880 INFO L430 AbstractCegarLoop]: === Iteration 326 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:23,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:23,880 INFO L82 PathProgramCache]: Analyzing trace with hash -1345698456, now seen corresponding path program 182 times [2021-06-05 03:52:23,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:23,880 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231431046] [2021-06-05 03:52:23,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:23,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:23,970 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 119 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:52:23,970 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:23,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231431046] [2021-06-05 03:52:23,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231431046] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:23,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279917435] [2021-06-05 03:52:23,971 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:23,996 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:52:23,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:52:23,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 03:52:23,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:24,066 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 119 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:52:24,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279917435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:24,066 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:24,066 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 03:52:24,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507736329] [2021-06-05 03:52:24,066 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:52:24,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:24,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:52:24,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:52:24,067 INFO L87 Difference]: Start difference. First operand 10400 states and 27035 transitions. Second operand has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 13 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:24,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:24,656 INFO L93 Difference]: Finished difference Result 14179 states and 34868 transitions. [2021-06-05 03:52:24,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 03:52:24,657 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 13 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 03:52:24,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:24,671 INFO L225 Difference]: With dead ends: 14179 [2021-06-05 03:52:24,671 INFO L226 Difference]: Without dead ends: 14023 [2021-06-05 03:52:24,671 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 207.6ms TimeCoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2021-06-05 03:52:24,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14023 states. [2021-06-05 03:52:24,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14023 to 10040. [2021-06-05 03:52:24,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10040 states, 10039 states have (on average 2.592887737822492) internal successors, (26030), 10039 states have internal predecessors, (26030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:24,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10040 states to 10040 states and 26030 transitions. [2021-06-05 03:52:24,839 INFO L78 Accepts]: Start accepts. Automaton has 10040 states and 26030 transitions. Word has length 53 [2021-06-05 03:52:24,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:24,839 INFO L482 AbstractCegarLoop]: Abstraction has 10040 states and 26030 transitions. [2021-06-05 03:52:24,839 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 13 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:24,839 INFO L276 IsEmpty]: Start isEmpty. Operand 10040 states and 26030 transitions. [2021-06-05 03:52:24,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 03:52:24,846 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:24,846 INFO L521 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:25,047 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 318 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable642 [2021-06-05 03:52:25,047 INFO L430 AbstractCegarLoop]: === Iteration 327 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:25,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:25,047 INFO L82 PathProgramCache]: Analyzing trace with hash -1583759973, now seen corresponding path program 86 times [2021-06-05 03:52:25,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:25,047 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218697057] [2021-06-05 03:52:25,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:25,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:25,105 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 104 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:52:25,105 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:25,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218697057] [2021-06-05 03:52:25,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218697057] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:25,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203743407] [2021-06-05 03:52:25,106 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:25,133 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:52:25,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:52:25,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 03:52:25,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:25,214 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 105 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:25,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203743407] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:25,215 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:25,215 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 11 [2021-06-05 03:52:25,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115488874] [2021-06-05 03:52:25,215 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 03:52:25,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:25,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 03:52:25,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:52:25,215 INFO L87 Difference]: Start difference. First operand 10040 states and 26030 transitions. Second operand has 12 states, 12 states have (on average 4.75) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:25,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:25,402 INFO L93 Difference]: Finished difference Result 12926 states and 32056 transitions. [2021-06-05 03:52:25,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 03:52:25,402 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 03:52:25,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:25,416 INFO L225 Difference]: With dead ends: 12926 [2021-06-05 03:52:25,416 INFO L226 Difference]: Without dead ends: 12912 [2021-06-05 03:52:25,416 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 64.3ms TimeCoverageRelationStatistics Valid=74, Invalid=108, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:52:25,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12912 states. [2021-06-05 03:52:25,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12912 to 10415. [2021-06-05 03:52:25,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10415 states, 10414 states have (on average 2.6024582293067025) internal successors, (27102), 10414 states have internal predecessors, (27102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:25,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10415 states to 10415 states and 27102 transitions. [2021-06-05 03:52:25,553 INFO L78 Accepts]: Start accepts. Automaton has 10415 states and 27102 transitions. Word has length 53 [2021-06-05 03:52:25,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:25,553 INFO L482 AbstractCegarLoop]: Abstraction has 10415 states and 27102 transitions. [2021-06-05 03:52:25,553 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:25,553 INFO L276 IsEmpty]: Start isEmpty. Operand 10415 states and 27102 transitions. [2021-06-05 03:52:25,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 03:52:25,560 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:25,560 INFO L521 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:25,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 319 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable643 [2021-06-05 03:52:25,760 INFO L430 AbstractCegarLoop]: === Iteration 328 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:25,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:25,760 INFO L82 PathProgramCache]: Analyzing trace with hash 2089326913, now seen corresponding path program 87 times [2021-06-05 03:52:25,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:25,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877878774] [2021-06-05 03:52:25,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:25,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:25,814 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 104 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:52:25,814 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:25,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877878774] [2021-06-05 03:52:25,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877878774] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:25,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532198981] [2021-06-05 03:52:25,814 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:25,843 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-06-05 03:52:25,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:52:25,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 03:52:25,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:25,924 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 109 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:52:25,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532198981] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:25,924 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:25,924 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 12 [2021-06-05 03:52:25,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111710768] [2021-06-05 03:52:25,925 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 03:52:25,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:25,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 03:52:25,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:52:25,925 INFO L87 Difference]: Start difference. First operand 10415 states and 27102 transitions. Second operand has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:26,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:26,172 INFO L93 Difference]: Finished difference Result 13428 states and 33227 transitions. [2021-06-05 03:52:26,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 03:52:26,172 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 03:52:26,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:26,186 INFO L225 Difference]: With dead ends: 13428 [2021-06-05 03:52:26,186 INFO L226 Difference]: Without dead ends: 13428 [2021-06-05 03:52:26,187 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 111.7ms TimeCoverageRelationStatistics Valid=144, Invalid=198, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:52:26,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13428 states. [2021-06-05 03:52:26,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13428 to 10022. [2021-06-05 03:52:26,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10022 states, 10021 states have (on average 2.595150184612314) internal successors, (26006), 10021 states have internal predecessors, (26006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:26,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10022 states to 10022 states and 26006 transitions. [2021-06-05 03:52:26,317 INFO L78 Accepts]: Start accepts. Automaton has 10022 states and 26006 transitions. Word has length 53 [2021-06-05 03:52:26,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:26,317 INFO L482 AbstractCegarLoop]: Abstraction has 10022 states and 26006 transitions. [2021-06-05 03:52:26,317 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:26,317 INFO L276 IsEmpty]: Start isEmpty. Operand 10022 states and 26006 transitions. [2021-06-05 03:52:26,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 03:52:26,324 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:26,324 INFO L521 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:26,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 320 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable645 [2021-06-05 03:52:26,524 INFO L430 AbstractCegarLoop]: === Iteration 329 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:26,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:26,525 INFO L82 PathProgramCache]: Analyzing trace with hash 547874413, now seen corresponding path program 183 times [2021-06-05 03:52:26,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:26,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514865859] [2021-06-05 03:52:26,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:26,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:26,601 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 47 proven. 88 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:52:26,601 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:26,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514865859] [2021-06-05 03:52:26,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514865859] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:26,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149575132] [2021-06-05 03:52:26,602 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:26,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 03:52:26,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:52:26,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 03:52:26,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:26,699 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 47 proven. 88 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:52:26,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149575132] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:26,699 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:26,699 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-06-05 03:52:26,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837259082] [2021-06-05 03:52:26,699 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:52:26,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:26,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:52:26,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:52:26,699 INFO L87 Difference]: Start difference. First operand 10022 states and 26006 transitions. Second operand has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:26,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:26,945 INFO L93 Difference]: Finished difference Result 11503 states and 28619 transitions. [2021-06-05 03:52:26,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 03:52:26,946 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 03:52:26,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:26,956 INFO L225 Difference]: With dead ends: 11503 [2021-06-05 03:52:26,957 INFO L226 Difference]: Without dead ends: 11467 [2021-06-05 03:52:26,957 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 105.0ms TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:52:26,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11467 states. [2021-06-05 03:52:27,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11467 to 10022. [2021-06-05 03:52:27,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10022 states, 10021 states have (on average 2.5942520706516317) internal successors, (25997), 10021 states have internal predecessors, (25997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:27,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10022 states to 10022 states and 25997 transitions. [2021-06-05 03:52:27,072 INFO L78 Accepts]: Start accepts. Automaton has 10022 states and 25997 transitions. Word has length 53 [2021-06-05 03:52:27,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:27,072 INFO L482 AbstractCegarLoop]: Abstraction has 10022 states and 25997 transitions. [2021-06-05 03:52:27,072 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:27,072 INFO L276 IsEmpty]: Start isEmpty. Operand 10022 states and 25997 transitions. [2021-06-05 03:52:27,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 03:52:27,119 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:27,119 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:27,319 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable648,321 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:27,319 INFO L430 AbstractCegarLoop]: === Iteration 330 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:27,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:27,320 INFO L82 PathProgramCache]: Analyzing trace with hash 355684522, now seen corresponding path program 88 times [2021-06-05 03:52:27,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:27,320 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251822208] [2021-06-05 03:52:27,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:27,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:27,394 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 8 proven. 123 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:52:27,394 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:27,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251822208] [2021-06-05 03:52:27,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251822208] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:27,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306931598] [2021-06-05 03:52:27,395 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:27,421 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:52:27,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:52:27,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 03:52:27,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:27,491 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 124 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:52:27,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306931598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:27,491 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:27,491 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 03:52:27,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916967256] [2021-06-05 03:52:27,492 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 03:52:27,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:27,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 03:52:27,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-05 03:52:27,492 INFO L87 Difference]: Start difference. First operand 10022 states and 25997 transitions. Second operand has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:27,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:27,871 INFO L93 Difference]: Finished difference Result 11456 states and 28845 transitions. [2021-06-05 03:52:27,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 03:52:27,872 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 03:52:27,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:27,882 INFO L225 Difference]: With dead ends: 11456 [2021-06-05 03:52:27,883 INFO L226 Difference]: Without dead ends: 11434 [2021-06-05 03:52:27,883 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 114.9ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:52:27,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11434 states. [2021-06-05 03:52:27,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11434 to 10210. [2021-06-05 03:52:27,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10210 states, 10209 states have (on average 2.591928690371241) internal successors, (26461), 10209 states have internal predecessors, (26461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:27,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10210 states to 10210 states and 26461 transitions. [2021-06-05 03:52:27,999 INFO L78 Accepts]: Start accepts. Automaton has 10210 states and 26461 transitions. Word has length 53 [2021-06-05 03:52:27,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:27,999 INFO L482 AbstractCegarLoop]: Abstraction has 10210 states and 26461 transitions. [2021-06-05 03:52:27,999 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:27,999 INFO L276 IsEmpty]: Start isEmpty. Operand 10210 states and 26461 transitions. [2021-06-05 03:52:28,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 03:52:28,005 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:28,006 INFO L521 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:28,206 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 322 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable654 [2021-06-05 03:52:28,206 INFO L430 AbstractCegarLoop]: === Iteration 331 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:28,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:28,206 INFO L82 PathProgramCache]: Analyzing trace with hash -1198012335, now seen corresponding path program 184 times [2021-06-05 03:52:28,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:28,206 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755510960] [2021-06-05 03:52:28,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:28,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:28,253 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 50 proven. 81 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 03:52:28,253 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:28,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755510960] [2021-06-05 03:52:28,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755510960] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:28,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56716391] [2021-06-05 03:52:28,253 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:28,279 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:52:28,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:52:28,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 03:52:28,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:28,346 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 50 proven. 81 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 03:52:28,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56716391] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:28,346 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:28,346 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 03:52:28,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178643568] [2021-06-05 03:52:28,346 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 03:52:28,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:28,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 03:52:28,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-06-05 03:52:28,347 INFO L87 Difference]: Start difference. First operand 10210 states and 26461 transitions. Second operand has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:28,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:28,484 INFO L93 Difference]: Finished difference Result 11989 states and 29653 transitions. [2021-06-05 03:52:28,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 03:52:28,484 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 03:52:28,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:28,495 INFO L225 Difference]: With dead ends: 11989 [2021-06-05 03:52:28,495 INFO L226 Difference]: Without dead ends: 11986 [2021-06-05 03:52:28,496 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 42.7ms TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-06-05 03:52:28,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11986 states. [2021-06-05 03:52:28,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11986 to 10202. [2021-06-05 03:52:28,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10202 states, 10201 states have (on average 2.5904323105577887) internal successors, (26425), 10201 states have internal predecessors, (26425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:28,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10202 states to 10202 states and 26425 transitions. [2021-06-05 03:52:28,617 INFO L78 Accepts]: Start accepts. Automaton has 10202 states and 26425 transitions. Word has length 53 [2021-06-05 03:52:28,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:28,618 INFO L482 AbstractCegarLoop]: Abstraction has 10202 states and 26425 transitions. [2021-06-05 03:52:28,618 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:28,618 INFO L276 IsEmpty]: Start isEmpty. Operand 10202 states and 26425 transitions. [2021-06-05 03:52:28,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 03:52:28,625 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:28,625 INFO L521 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:28,825 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable655,323 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:28,826 INFO L430 AbstractCegarLoop]: === Iteration 332 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:28,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:28,826 INFO L82 PathProgramCache]: Analyzing trace with hash -990949769, now seen corresponding path program 185 times [2021-06-05 03:52:28,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:28,826 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703354009] [2021-06-05 03:52:28,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:28,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:28,896 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 44 proven. 87 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 03:52:28,896 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:28,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703354009] [2021-06-05 03:52:28,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703354009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:28,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786352419] [2021-06-05 03:52:28,896 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:28,927 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-06-05 03:52:28,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:52:28,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 03:52:28,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:29,012 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 48 proven. 87 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:52:29,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786352419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:29,012 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:29,012 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 13 [2021-06-05 03:52:29,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412439001] [2021-06-05 03:52:29,012 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:52:29,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:29,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:52:29,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:52:29,013 INFO L87 Difference]: Start difference. First operand 10202 states and 26425 transitions. Second operand has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 13 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:29,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:29,222 INFO L93 Difference]: Finished difference Result 12152 states and 29947 transitions. [2021-06-05 03:52:29,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 03:52:29,222 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 13 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 03:52:29,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:29,234 INFO L225 Difference]: With dead ends: 12152 [2021-06-05 03:52:29,234 INFO L226 Difference]: Without dead ends: 12134 [2021-06-05 03:52:29,234 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 86.1ms TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:52:29,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12134 states. [2021-06-05 03:52:29,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12134 to 10202. [2021-06-05 03:52:29,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10202 states, 10201 states have (on average 2.5880796000392117) internal successors, (26401), 10201 states have internal predecessors, (26401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:29,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10202 states to 10202 states and 26401 transitions. [2021-06-05 03:52:29,352 INFO L78 Accepts]: Start accepts. Automaton has 10202 states and 26401 transitions. Word has length 53 [2021-06-05 03:52:29,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:29,352 INFO L482 AbstractCegarLoop]: Abstraction has 10202 states and 26401 transitions. [2021-06-05 03:52:29,352 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 13 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:29,352 INFO L276 IsEmpty]: Start isEmpty. Operand 10202 states and 26401 transitions. [2021-06-05 03:52:29,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 03:52:29,359 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:29,359 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:29,559 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 324 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable657 [2021-06-05 03:52:29,560 INFO L430 AbstractCegarLoop]: === Iteration 333 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:29,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:29,560 INFO L82 PathProgramCache]: Analyzing trace with hash 1856017514, now seen corresponding path program 186 times [2021-06-05 03:52:29,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:29,560 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239091863] [2021-06-05 03:52:29,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:29,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:29,629 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 18 proven. 113 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:52:29,629 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:29,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239091863] [2021-06-05 03:52:29,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239091863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:29,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894188080] [2021-06-05 03:52:29,629 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:29,659 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-06-05 03:52:29,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:52:29,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 03:52:29,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:29,739 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 13 proven. 118 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:52:29,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894188080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:29,739 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:29,740 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 03:52:29,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127937588] [2021-06-05 03:52:29,740 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 03:52:29,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:29,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 03:52:29,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-05 03:52:29,740 INFO L87 Difference]: Start difference. First operand 10202 states and 26401 transitions. Second operand has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:30,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:30,260 INFO L93 Difference]: Finished difference Result 11006 states and 27812 transitions. [2021-06-05 03:52:30,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 03:52:30,260 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 03:52:30,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:30,269 INFO L225 Difference]: With dead ends: 11006 [2021-06-05 03:52:30,269 INFO L226 Difference]: Without dead ends: 10914 [2021-06-05 03:52:30,269 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 113.7ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:52:30,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10914 states. [2021-06-05 03:52:30,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10914 to 10195. [2021-06-05 03:52:30,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10195 states, 10194 states have (on average 2.581518540317834) internal successors, (26316), 10194 states have internal predecessors, (26316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:30,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10195 states to 10195 states and 26316 transitions. [2021-06-05 03:52:30,376 INFO L78 Accepts]: Start accepts. Automaton has 10195 states and 26316 transitions. Word has length 53 [2021-06-05 03:52:30,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:30,376 INFO L482 AbstractCegarLoop]: Abstraction has 10195 states and 26316 transitions. [2021-06-05 03:52:30,376 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:30,376 INFO L276 IsEmpty]: Start isEmpty. Operand 10195 states and 26316 transitions. [2021-06-05 03:52:30,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 03:52:30,382 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:30,382 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:30,583 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable660,325 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:30,583 INFO L430 AbstractCegarLoop]: === Iteration 334 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:30,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:30,583 INFO L82 PathProgramCache]: Analyzing trace with hash 1242481334, now seen corresponding path program 187 times [2021-06-05 03:52:30,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:30,583 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682965123] [2021-06-05 03:52:30,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:30,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:30,658 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 114 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 03:52:30,658 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:30,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682965123] [2021-06-05 03:52:30,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682965123] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:30,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816334061] [2021-06-05 03:52:30,658 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:30,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:30,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 03:52:30,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:30,753 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 115 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 03:52:30,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816334061] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:30,753 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:30,753 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 03:52:30,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786391035] [2021-06-05 03:52:30,753 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 03:52:30,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:30,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 03:52:30,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-05 03:52:30,754 INFO L87 Difference]: Start difference. First operand 10195 states and 26316 transitions. Second operand has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:31,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:31,149 INFO L93 Difference]: Finished difference Result 11506 states and 28913 transitions. [2021-06-05 03:52:31,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 03:52:31,150 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 03:52:31,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:31,160 INFO L225 Difference]: With dead ends: 11506 [2021-06-05 03:52:31,161 INFO L226 Difference]: Without dead ends: 11494 [2021-06-05 03:52:31,161 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 114.0ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:52:31,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11494 states. [2021-06-05 03:52:31,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11494 to 10289. [2021-06-05 03:52:31,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10289 states, 10288 states have (on average 2.5804821150855366) internal successors, (26548), 10288 states have internal predecessors, (26548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:31,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10289 states to 10289 states and 26548 transitions. [2021-06-05 03:52:31,276 INFO L78 Accepts]: Start accepts. Automaton has 10289 states and 26548 transitions. Word has length 53 [2021-06-05 03:52:31,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:31,277 INFO L482 AbstractCegarLoop]: Abstraction has 10289 states and 26548 transitions. [2021-06-05 03:52:31,277 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:31,277 INFO L276 IsEmpty]: Start isEmpty. Operand 10289 states and 26548 transitions. [2021-06-05 03:52:31,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 03:52:31,284 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:31,284 INFO L521 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:31,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 326 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable661 [2021-06-05 03:52:31,484 INFO L430 AbstractCegarLoop]: === Iteration 335 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:31,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:31,485 INFO L82 PathProgramCache]: Analyzing trace with hash 1085181847, now seen corresponding path program 89 times [2021-06-05 03:52:31,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:31,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758708131] [2021-06-05 03:52:31,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:31,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:31,538 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 87 proven. 47 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:52:31,539 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:31,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758708131] [2021-06-05 03:52:31,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758708131] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:31,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398748177] [2021-06-05 03:52:31,539 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:31,569 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-06-05 03:52:31,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:52:31,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 03:52:31,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:31,651 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 89 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:52:31,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398748177] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:31,652 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:31,652 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 13 [2021-06-05 03:52:31,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511532165] [2021-06-05 03:52:31,652 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:52:31,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:31,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:52:31,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:52:31,652 INFO L87 Difference]: Start difference. First operand 10289 states and 26548 transitions. Second operand has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:31,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:31,840 INFO L93 Difference]: Finished difference Result 12783 states and 31677 transitions. [2021-06-05 03:52:31,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 03:52:31,841 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 03:52:31,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:31,853 INFO L225 Difference]: With dead ends: 12783 [2021-06-05 03:52:31,853 INFO L226 Difference]: Without dead ends: 12763 [2021-06-05 03:52:31,853 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 79.6ms TimeCoverageRelationStatistics Valid=101, Invalid=171, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:52:31,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12763 states. [2021-06-05 03:52:31,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12763 to 10650. [2021-06-05 03:52:31,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10650 states, 10649 states have (on average 2.5842802141046106) internal successors, (27520), 10649 states have internal predecessors, (27520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:31,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10650 states to 10650 states and 27520 transitions. [2021-06-05 03:52:31,980 INFO L78 Accepts]: Start accepts. Automaton has 10650 states and 27520 transitions. Word has length 53 [2021-06-05 03:52:31,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:31,980 INFO L482 AbstractCegarLoop]: Abstraction has 10650 states and 27520 transitions. [2021-06-05 03:52:31,980 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:31,980 INFO L276 IsEmpty]: Start isEmpty. Operand 10650 states and 27520 transitions. [2021-06-05 03:52:31,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 03:52:31,987 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:31,987 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:32,187 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 327 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable662 [2021-06-05 03:52:32,187 INFO L430 AbstractCegarLoop]: === Iteration 336 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:32,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:32,188 INFO L82 PathProgramCache]: Analyzing trace with hash -910568628, now seen corresponding path program 188 times [2021-06-05 03:52:32,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:32,188 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954341732] [2021-06-05 03:52:32,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:32,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:32,261 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 116 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:52:32,261 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:32,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954341732] [2021-06-05 03:52:32,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954341732] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:32,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065881846] [2021-06-05 03:52:32,262 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:32,287 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:52:32,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:52:32,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 03:52:32,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:32,357 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 117 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:52:32,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065881846] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:32,358 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:32,358 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 03:52:32,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466738655] [2021-06-05 03:52:32,358 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 03:52:32,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:32,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 03:52:32,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:52:32,358 INFO L87 Difference]: Start difference. First operand 10650 states and 27520 transitions. Second operand has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:32,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:32,902 INFO L93 Difference]: Finished difference Result 13521 states and 33551 transitions. [2021-06-05 03:52:32,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 03:52:32,902 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 03:52:32,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:32,915 INFO L225 Difference]: With dead ends: 13521 [2021-06-05 03:52:32,915 INFO L226 Difference]: Without dead ends: 13467 [2021-06-05 03:52:32,915 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 186.5ms TimeCoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2021-06-05 03:52:32,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13467 states. [2021-06-05 03:52:33,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13467 to 10945. [2021-06-05 03:52:33,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10945 states, 10944 states have (on average 2.5868055555555554) internal successors, (28310), 10944 states have internal predecessors, (28310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:33,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10945 states to 10945 states and 28310 transitions. [2021-06-05 03:52:33,078 INFO L78 Accepts]: Start accepts. Automaton has 10945 states and 28310 transitions. Word has length 53 [2021-06-05 03:52:33,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:33,078 INFO L482 AbstractCegarLoop]: Abstraction has 10945 states and 28310 transitions. [2021-06-05 03:52:33,078 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:33,078 INFO L276 IsEmpty]: Start isEmpty. Operand 10945 states and 28310 transitions. [2021-06-05 03:52:33,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 03:52:33,085 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:33,085 INFO L521 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:33,285 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable665,328 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:33,286 INFO L430 AbstractCegarLoop]: === Iteration 337 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:33,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:33,286 INFO L82 PathProgramCache]: Analyzing trace with hash 621990481, now seen corresponding path program 189 times [2021-06-05 03:52:33,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:33,286 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874552342] [2021-06-05 03:52:33,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:33,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:33,349 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 36 proven. 98 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:52:33,349 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:33,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874552342] [2021-06-05 03:52:33,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874552342] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:33,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596089166] [2021-06-05 03:52:33,349 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:33,378 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-06-05 03:52:33,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:52:33,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 03:52:33,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:33,448 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 36 proven. 98 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:52:33,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596089166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:33,448 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:33,448 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 03:52:33,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250253957] [2021-06-05 03:52:33,448 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 03:52:33,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:33,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 03:52:33,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:52:33,448 INFO L87 Difference]: Start difference. First operand 10945 states and 28310 transitions. Second operand has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:33,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:33,633 INFO L93 Difference]: Finished difference Result 12806 states and 31626 transitions. [2021-06-05 03:52:33,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 03:52:33,633 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 03:52:33,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:33,646 INFO L225 Difference]: With dead ends: 12806 [2021-06-05 03:52:33,646 INFO L226 Difference]: Without dead ends: 12782 [2021-06-05 03:52:33,646 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 72.0ms TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:52:33,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12782 states. [2021-06-05 03:52:33,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12782 to 10945. [2021-06-05 03:52:33,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10945 states, 10944 states have (on average 2.5852521929824563) internal successors, (28293), 10944 states have internal predecessors, (28293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:33,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10945 states to 10945 states and 28293 transitions. [2021-06-05 03:52:33,786 INFO L78 Accepts]: Start accepts. Automaton has 10945 states and 28293 transitions. Word has length 53 [2021-06-05 03:52:33,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:33,786 INFO L482 AbstractCegarLoop]: Abstraction has 10945 states and 28293 transitions. [2021-06-05 03:52:33,786 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:33,786 INFO L276 IsEmpty]: Start isEmpty. Operand 10945 states and 28293 transitions. [2021-06-05 03:52:33,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 03:52:33,794 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:33,794 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:33,995 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 329 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable666 [2021-06-05 03:52:33,995 INFO L430 AbstractCegarLoop]: === Iteration 338 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:33,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:33,995 INFO L82 PathProgramCache]: Analyzing trace with hash -755732094, now seen corresponding path program 190 times [2021-06-05 03:52:33,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:33,995 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706610520] [2021-06-05 03:52:33,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:33,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:34,076 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 116 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:52:34,077 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:34,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706610520] [2021-06-05 03:52:34,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706610520] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:34,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511493098] [2021-06-05 03:52:34,077 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:34,102 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:52:34,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:52:34,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 03:52:34,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:34,172 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 117 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:52:34,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511493098] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:34,172 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:34,172 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 03:52:34,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924502139] [2021-06-05 03:52:34,172 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 03:52:34,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:34,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 03:52:34,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:52:34,173 INFO L87 Difference]: Start difference. First operand 10945 states and 28293 transitions. Second operand has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:34,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:34,943 INFO L93 Difference]: Finished difference Result 17261 states and 41917 transitions. [2021-06-05 03:52:34,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 03:52:34,943 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 03:52:34,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:34,961 INFO L225 Difference]: With dead ends: 17261 [2021-06-05 03:52:34,961 INFO L226 Difference]: Without dead ends: 17081 [2021-06-05 03:52:34,961 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 343.4ms TimeCoverageRelationStatistics Valid=225, Invalid=1581, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 03:52:34,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17081 states. [2021-06-05 03:52:35,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17081 to 11484. [2021-06-05 03:52:35,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11484 states, 11483 states have (on average 2.586432117042585) internal successors, (29700), 11483 states have internal predecessors, (29700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:35,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11484 states to 11484 states and 29700 transitions. [2021-06-05 03:52:35,124 INFO L78 Accepts]: Start accepts. Automaton has 11484 states and 29700 transitions. Word has length 53 [2021-06-05 03:52:35,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:35,124 INFO L482 AbstractCegarLoop]: Abstraction has 11484 states and 29700 transitions. [2021-06-05 03:52:35,124 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:35,124 INFO L276 IsEmpty]: Start isEmpty. Operand 11484 states and 29700 transitions. [2021-06-05 03:52:35,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 03:52:35,131 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:35,131 INFO L521 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:35,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable670,330 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:35,332 INFO L430 AbstractCegarLoop]: === Iteration 339 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:35,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:35,332 INFO L82 PathProgramCache]: Analyzing trace with hash -369129417, now seen corresponding path program 191 times [2021-06-05 03:52:35,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:35,332 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158856820] [2021-06-05 03:52:35,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:35,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:35,401 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 34 proven. 100 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:52:35,402 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:35,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158856820] [2021-06-05 03:52:35,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158856820] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:35,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844537398] [2021-06-05 03:52:35,402 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:35,430 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-05 03:52:35,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:52:35,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 03:52:35,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:35,516 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 34 proven. 100 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:52:35,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844537398] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:35,516 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:35,516 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 15 [2021-06-05 03:52:35,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351134799] [2021-06-05 03:52:35,517 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:52:35,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:35,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:52:35,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:52:35,517 INFO L87 Difference]: Start difference. First operand 11484 states and 29700 transitions. Second operand has 16 states, 16 states have (on average 4.375) internal successors, (70), 15 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:35,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:35,757 INFO L93 Difference]: Finished difference Result 13565 states and 33450 transitions. [2021-06-05 03:52:35,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 03:52:35,757 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.375) internal successors, (70), 15 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 03:52:35,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:35,770 INFO L225 Difference]: With dead ends: 13565 [2021-06-05 03:52:35,771 INFO L226 Difference]: Without dead ends: 13532 [2021-06-05 03:52:35,771 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 108.6ms TimeCoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2021-06-05 03:52:35,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13532 states. [2021-06-05 03:52:35,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13532 to 11484. [2021-06-05 03:52:35,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11484 states, 11483 states have (on average 2.58564834973439) internal successors, (29691), 11483 states have internal predecessors, (29691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:35,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11484 states to 11484 states and 29691 transitions. [2021-06-05 03:52:35,938 INFO L78 Accepts]: Start accepts. Automaton has 11484 states and 29691 transitions. Word has length 53 [2021-06-05 03:52:35,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:35,938 INFO L482 AbstractCegarLoop]: Abstraction has 11484 states and 29691 transitions. [2021-06-05 03:52:35,938 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.375) internal successors, (70), 15 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:35,938 INFO L276 IsEmpty]: Start isEmpty. Operand 11484 states and 29691 transitions. [2021-06-05 03:52:35,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 03:52:35,945 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:35,945 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:36,146 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable671,331 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:36,146 INFO L430 AbstractCegarLoop]: === Iteration 340 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:36,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:36,146 INFO L82 PathProgramCache]: Analyzing trace with hash -815423604, now seen corresponding path program 192 times [2021-06-05 03:52:36,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:36,146 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275143287] [2021-06-05 03:52:36,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:36,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:36,237 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 116 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:52:36,237 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:36,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275143287] [2021-06-05 03:52:36,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275143287] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:36,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909601530] [2021-06-05 03:52:36,238 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:36,267 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-06-05 03:52:36,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:52:36,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 03:52:36,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:36,338 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 117 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:52:36,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909601530] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:36,338 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:36,338 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 03:52:36,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782249732] [2021-06-05 03:52:36,338 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:52:36,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:36,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:52:36,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:52:36,339 INFO L87 Difference]: Start difference. First operand 11484 states and 29691 transitions. Second operand has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:37,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:37,494 INFO L93 Difference]: Finished difference Result 21447 states and 51505 transitions. [2021-06-05 03:52:37,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 03:52:37,495 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 03:52:37,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:37,519 INFO L225 Difference]: With dead ends: 21447 [2021-06-05 03:52:37,520 INFO L226 Difference]: Without dead ends: 21171 [2021-06-05 03:52:37,520 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1425 ImplicationChecksByTransitivity, 621.3ms TimeCoverageRelationStatistics Valid=495, Invalid=3927, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 03:52:37,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21171 states. [2021-06-05 03:52:37,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21171 to 11987. [2021-06-05 03:52:37,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11987 states, 11986 states have (on average 2.5869347572167527) internal successors, (31007), 11986 states have internal predecessors, (31007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:37,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11987 states to 11987 states and 31007 transitions. [2021-06-05 03:52:37,719 INFO L78 Accepts]: Start accepts. Automaton has 11987 states and 31007 transitions. Word has length 53 [2021-06-05 03:52:37,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:37,719 INFO L482 AbstractCegarLoop]: Abstraction has 11987 states and 31007 transitions. [2021-06-05 03:52:37,720 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:37,720 INFO L276 IsEmpty]: Start isEmpty. Operand 11987 states and 31007 transitions. [2021-06-05 03:52:37,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 03:52:37,727 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:37,727 INFO L521 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:37,927 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable676,332 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:37,928 INFO L430 AbstractCegarLoop]: === Iteration 341 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:37,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:37,928 INFO L82 PathProgramCache]: Analyzing trace with hash 1078149265, now seen corresponding path program 193 times [2021-06-05 03:52:37,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:37,928 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752837092] [2021-06-05 03:52:37,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:37,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:38,008 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 38 proven. 96 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:52:38,008 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:38,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752837092] [2021-06-05 03:52:38,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752837092] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:38,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189521530] [2021-06-05 03:52:38,008 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:38,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:38,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 03:52:38,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:38,105 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 38 proven. 96 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:52:38,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189521530] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:38,105 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:38,105 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-06-05 03:52:38,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654310421] [2021-06-05 03:52:38,105 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:52:38,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:38,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:52:38,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:52:38,105 INFO L87 Difference]: Start difference. First operand 11987 states and 31007 transitions. Second operand has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:38,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:38,337 INFO L93 Difference]: Finished difference Result 14020 states and 34646 transitions. [2021-06-05 03:52:38,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 03:52:38,337 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 03:52:38,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:38,351 INFO L225 Difference]: With dead ends: 14020 [2021-06-05 03:52:38,351 INFO L226 Difference]: Without dead ends: 13978 [2021-06-05 03:52:38,352 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 107.5ms TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:52:38,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13978 states. [2021-06-05 03:52:38,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13978 to 11653. [2021-06-05 03:52:38,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11653 states, 11652 states have (on average 2.5810161345691727) internal successors, (30074), 11652 states have internal predecessors, (30074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:38,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11653 states to 11653 states and 30074 transitions. [2021-06-05 03:52:38,493 INFO L78 Accepts]: Start accepts. Automaton has 11653 states and 30074 transitions. Word has length 53 [2021-06-05 03:52:38,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:38,493 INFO L482 AbstractCegarLoop]: Abstraction has 11653 states and 30074 transitions. [2021-06-05 03:52:38,493 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:38,493 INFO L276 IsEmpty]: Start isEmpty. Operand 11653 states and 30074 transitions. [2021-06-05 03:52:38,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 03:52:38,501 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:38,501 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:38,701 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 333 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable677 [2021-06-05 03:52:38,701 INFO L430 AbstractCegarLoop]: === Iteration 342 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:38,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:38,701 INFO L82 PathProgramCache]: Analyzing trace with hash -968737470, now seen corresponding path program 194 times [2021-06-05 03:52:38,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:38,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551323377] [2021-06-05 03:52:38,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:38,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:38,846 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 119 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:52:38,847 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:38,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551323377] [2021-06-05 03:52:38,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551323377] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:38,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022550911] [2021-06-05 03:52:38,847 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:38,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:52:38,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:52:38,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 03:52:38,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:38,943 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 119 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:52:38,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022550911] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:38,943 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:38,943 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 03:52:38,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049129191] [2021-06-05 03:52:38,943 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 03:52:38,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:38,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 03:52:38,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:52:38,944 INFO L87 Difference]: Start difference. First operand 11653 states and 30074 transitions. Second operand has 15 states, 15 states have (on average 3.6) internal successors, (54), 14 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:39,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:39,551 INFO L93 Difference]: Finished difference Result 16353 states and 39527 transitions. [2021-06-05 03:52:39,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 03:52:39,552 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 14 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 03:52:39,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:39,568 INFO L225 Difference]: With dead ends: 16353 [2021-06-05 03:52:39,568 INFO L226 Difference]: Without dead ends: 15975 [2021-06-05 03:52:39,568 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 296.6ms TimeCoverageRelationStatistics Valid=138, Invalid=732, Unknown=0, NotChecked=0, Total=870 [2021-06-05 03:52:39,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15975 states. [2021-06-05 03:52:39,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15975 to 10369. [2021-06-05 03:52:39,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10369 states, 10368 states have (on average 2.568672839506173) internal successors, (26632), 10368 states have internal predecessors, (26632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:39,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10369 states to 10369 states and 26632 transitions. [2021-06-05 03:52:39,715 INFO L78 Accepts]: Start accepts. Automaton has 10369 states and 26632 transitions. Word has length 53 [2021-06-05 03:52:39,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:39,715 INFO L482 AbstractCegarLoop]: Abstraction has 10369 states and 26632 transitions. [2021-06-05 03:52:39,715 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 14 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:39,715 INFO L276 IsEmpty]: Start isEmpty. Operand 10369 states and 26632 transitions. [2021-06-05 03:52:39,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 03:52:39,723 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:39,723 INFO L521 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:39,923 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable683,334 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:39,923 INFO L430 AbstractCegarLoop]: === Iteration 343 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:39,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:39,924 INFO L82 PathProgramCache]: Analyzing trace with hash -1828679397, now seen corresponding path program 90 times [2021-06-05 03:52:39,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:39,924 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582802303] [2021-06-05 03:52:39,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:39,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:39,986 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 105 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:52:39,987 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:39,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582802303] [2021-06-05 03:52:39,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582802303] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:39,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635464360] [2021-06-05 03:52:39,987 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:40,017 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-06-05 03:52:40,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:52:40,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 03:52:40,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:40,090 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 106 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:52:40,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635464360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:40,090 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:40,090 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 11 [2021-06-05 03:52:40,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090310410] [2021-06-05 03:52:40,091 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 03:52:40,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:40,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 03:52:40,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=77, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:52:40,091 INFO L87 Difference]: Start difference. First operand 10369 states and 26632 transitions. Second operand has 12 states, 12 states have (on average 4.75) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:40,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:40,319 INFO L93 Difference]: Finished difference Result 15824 states and 38717 transitions. [2021-06-05 03:52:40,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 03:52:40,319 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 03:52:40,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:40,335 INFO L225 Difference]: With dead ends: 15824 [2021-06-05 03:52:40,335 INFO L226 Difference]: Without dead ends: 15824 [2021-06-05 03:52:40,335 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 86.1ms TimeCoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:52:40,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15824 states. [2021-06-05 03:52:40,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15824 to 10590. [2021-06-05 03:52:40,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10590 states, 10589 states have (on average 2.578808197185759) internal successors, (27307), 10589 states have internal predecessors, (27307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:40,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10590 states to 10590 states and 27307 transitions. [2021-06-05 03:52:40,481 INFO L78 Accepts]: Start accepts. Automaton has 10590 states and 27307 transitions. Word has length 53 [2021-06-05 03:52:40,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:40,481 INFO L482 AbstractCegarLoop]: Abstraction has 10590 states and 27307 transitions. [2021-06-05 03:52:40,482 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:40,482 INFO L276 IsEmpty]: Start isEmpty. Operand 10590 states and 27307 transitions. [2021-06-05 03:52:40,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 03:52:40,488 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:40,488 INFO L521 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:40,689 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 335 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable684 [2021-06-05 03:52:40,689 INFO L430 AbstractCegarLoop]: === Iteration 344 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:40,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:40,689 INFO L82 PathProgramCache]: Analyzing trace with hash 828715443, now seen corresponding path program 91 times [2021-06-05 03:52:40,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:40,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762819327] [2021-06-05 03:52:40,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:40,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:40,752 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 104 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:52:40,752 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:40,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762819327] [2021-06-05 03:52:40,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762819327] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:40,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959484706] [2021-06-05 03:52:40,752 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:40,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:40,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 03:52:40,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:40,853 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 105 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:52:40,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959484706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:40,853 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:40,853 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 12 [2021-06-05 03:52:40,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873999952] [2021-06-05 03:52:40,853 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 03:52:40,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:40,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 03:52:40,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:52:40,854 INFO L87 Difference]: Start difference. First operand 10590 states and 27307 transitions. Second operand has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 12 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:41,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:41,138 INFO L93 Difference]: Finished difference Result 17337 states and 42262 transitions. [2021-06-05 03:52:41,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 03:52:41,139 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 12 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 03:52:41,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:41,157 INFO L225 Difference]: With dead ends: 17337 [2021-06-05 03:52:41,157 INFO L226 Difference]: Without dead ends: 17337 [2021-06-05 03:52:41,157 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 125.0ms TimeCoverageRelationStatistics Valid=184, Invalid=278, Unknown=0, NotChecked=0, Total=462 [2021-06-05 03:52:41,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17337 states. [2021-06-05 03:52:41,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17337 to 10630. [2021-06-05 03:52:41,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10630 states, 10629 states have (on average 2.5802991814846177) internal successors, (27426), 10629 states have internal predecessors, (27426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:41,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10630 states to 10630 states and 27426 transitions. [2021-06-05 03:52:41,312 INFO L78 Accepts]: Start accepts. Automaton has 10630 states and 27426 transitions. Word has length 53 [2021-06-05 03:52:41,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:41,312 INFO L482 AbstractCegarLoop]: Abstraction has 10630 states and 27426 transitions. [2021-06-05 03:52:41,312 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 12 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:41,312 INFO L276 IsEmpty]: Start isEmpty. Operand 10630 states and 27426 transitions. [2021-06-05 03:52:41,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 03:52:41,319 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:41,319 INFO L521 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:41,559 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable685,336 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:41,559 INFO L430 AbstractCegarLoop]: === Iteration 345 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:41,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:41,559 INFO L82 PathProgramCache]: Analyzing trace with hash -861279721, now seen corresponding path program 92 times [2021-06-05 03:52:41,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:41,559 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591738542] [2021-06-05 03:52:41,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:41,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:41,631 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 97 proven. 37 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:52:41,632 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:41,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591738542] [2021-06-05 03:52:41,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591738542] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:41,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170558150] [2021-06-05 03:52:41,632 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:41,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:52:41,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:52:41,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 03:52:41,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:41,736 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 98 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:52:41,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170558150] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:41,736 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:41,736 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2021-06-05 03:52:41,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895536109] [2021-06-05 03:52:41,736 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:52:41,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:41,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:52:41,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:52:41,736 INFO L87 Difference]: Start difference. First operand 10630 states and 27426 transitions. Second operand has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 13 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:42,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:42,058 INFO L93 Difference]: Finished difference Result 17209 states and 41987 transitions. [2021-06-05 03:52:42,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 03:52:42,059 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 13 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 03:52:42,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:42,076 INFO L225 Difference]: With dead ends: 17209 [2021-06-05 03:52:42,076 INFO L226 Difference]: Without dead ends: 17209 [2021-06-05 03:52:42,076 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 154.3ms TimeCoverageRelationStatistics Valid=233, Invalid=367, Unknown=0, NotChecked=0, Total=600 [2021-06-05 03:52:42,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17209 states. [2021-06-05 03:52:42,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17209 to 10659. [2021-06-05 03:52:42,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10659 states, 10658 states have (on average 2.581534997185213) internal successors, (27514), 10658 states have internal predecessors, (27514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:42,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10659 states to 10659 states and 27514 transitions. [2021-06-05 03:52:42,231 INFO L78 Accepts]: Start accepts. Automaton has 10659 states and 27514 transitions. Word has length 53 [2021-06-05 03:52:42,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:42,232 INFO L482 AbstractCegarLoop]: Abstraction has 10659 states and 27514 transitions. [2021-06-05 03:52:42,232 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 13 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:42,232 INFO L276 IsEmpty]: Start isEmpty. Operand 10659 states and 27514 transitions. [2021-06-05 03:52:42,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 03:52:42,239 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:42,239 INFO L521 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:42,439 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 337 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable686 [2021-06-05 03:52:42,439 INFO L430 AbstractCegarLoop]: === Iteration 346 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:42,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:42,440 INFO L82 PathProgramCache]: Analyzing trace with hash -1900566733, now seen corresponding path program 93 times [2021-06-05 03:52:42,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:42,440 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157209555] [2021-06-05 03:52:42,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:42,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:42,522 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 90 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:52:42,522 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:42,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157209555] [2021-06-05 03:52:42,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157209555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:42,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568039511] [2021-06-05 03:52:42,522 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:42,552 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-06-05 03:52:42,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:52:42,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 03:52:42,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:42,674 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 112 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:52:42,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568039511] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:42,674 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:42,674 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 18 [2021-06-05 03:52:42,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531048086] [2021-06-05 03:52:42,674 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:52:42,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:42,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:52:42,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=225, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:52:42,674 INFO L87 Difference]: Start difference. First operand 10659 states and 27514 transitions. Second operand has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 18 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:43,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:43,067 INFO L93 Difference]: Finished difference Result 12656 states and 31353 transitions. [2021-06-05 03:52:43,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 03:52:43,067 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 18 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 03:52:43,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:43,081 INFO L225 Difference]: With dead ends: 12656 [2021-06-05 03:52:43,081 INFO L226 Difference]: Without dead ends: 12656 [2021-06-05 03:52:43,081 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 168.1ms TimeCoverageRelationStatistics Valid=200, Invalid=352, Unknown=0, NotChecked=0, Total=552 [2021-06-05 03:52:43,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12656 states. [2021-06-05 03:52:43,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12656 to 10205. [2021-06-05 03:52:43,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10205 states, 10204 states have (on average 2.5751666013328105) internal successors, (26277), 10204 states have internal predecessors, (26277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:43,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10205 states to 10205 states and 26277 transitions. [2021-06-05 03:52:43,208 INFO L78 Accepts]: Start accepts. Automaton has 10205 states and 26277 transitions. Word has length 53 [2021-06-05 03:52:43,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:43,208 INFO L482 AbstractCegarLoop]: Abstraction has 10205 states and 26277 transitions. [2021-06-05 03:52:43,208 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 18 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:43,208 INFO L276 IsEmpty]: Start isEmpty. Operand 10205 states and 26277 transitions. [2021-06-05 03:52:43,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 03:52:43,215 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:43,215 INFO L521 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:43,415 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 338 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable687 [2021-06-05 03:52:43,415 INFO L430 AbstractCegarLoop]: === Iteration 347 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:43,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:43,416 INFO L82 PathProgramCache]: Analyzing trace with hash -219319817, now seen corresponding path program 195 times [2021-06-05 03:52:43,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:43,416 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009784683] [2021-06-05 03:52:43,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:43,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:43,507 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 49 proven. 86 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:52:43,507 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:43,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009784683] [2021-06-05 03:52:43,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009784683] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:43,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897868312] [2021-06-05 03:52:43,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:43,535 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 03:52:43,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:52:43,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 03:52:43,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:43,607 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 49 proven. 86 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:52:43,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897868312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:43,607 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:43,607 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-06-05 03:52:43,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115888059] [2021-06-05 03:52:43,607 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 03:52:43,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:43,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 03:52:43,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:52:43,608 INFO L87 Difference]: Start difference. First operand 10205 states and 26277 transitions. Second operand has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:43,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:43,847 INFO L93 Difference]: Finished difference Result 11763 states and 29051 transitions. [2021-06-05 03:52:43,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 03:52:43,848 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 03:52:43,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:43,858 INFO L225 Difference]: With dead ends: 11763 [2021-06-05 03:52:43,858 INFO L226 Difference]: Without dead ends: 11718 [2021-06-05 03:52:43,859 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 128.1ms TimeCoverageRelationStatistics Valid=131, Invalid=289, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:52:43,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11718 states. [2021-06-05 03:52:43,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11718 to 10205. [2021-06-05 03:52:43,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10205 states, 10204 states have (on average 2.574284594276754) internal successors, (26268), 10204 states have internal predecessors, (26268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:43,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10205 states to 10205 states and 26268 transitions. [2021-06-05 03:52:43,977 INFO L78 Accepts]: Start accepts. Automaton has 10205 states and 26268 transitions. Word has length 53 [2021-06-05 03:52:43,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:43,977 INFO L482 AbstractCegarLoop]: Abstraction has 10205 states and 26268 transitions. [2021-06-05 03:52:43,977 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:43,977 INFO L276 IsEmpty]: Start isEmpty. Operand 10205 states and 26268 transitions. [2021-06-05 03:52:43,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 03:52:43,984 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:43,984 INFO L521 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:44,184 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable690,339 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:44,184 INFO L430 AbstractCegarLoop]: === Iteration 348 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:44,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:44,185 INFO L82 PathProgramCache]: Analyzing trace with hash 1122147283, now seen corresponding path program 196 times [2021-06-05 03:52:44,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:44,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135258647] [2021-06-05 03:52:44,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:44,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:44,235 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 43 proven. 88 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 03:52:44,235 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:44,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135258647] [2021-06-05 03:52:44,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135258647] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:44,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172998205] [2021-06-05 03:52:44,235 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:44,261 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:52:44,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:52:44,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 03:52:44,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:44,371 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 43 proven. 88 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 03:52:44,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172998205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:44,372 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:44,372 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 03:52:44,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998545453] [2021-06-05 03:52:44,372 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 03:52:44,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:44,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 03:52:44,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-06-05 03:52:44,372 INFO L87 Difference]: Start difference. First operand 10205 states and 26268 transitions. Second operand has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:44,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:44,512 INFO L93 Difference]: Finished difference Result 12506 states and 30816 transitions. [2021-06-05 03:52:44,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 03:52:44,512 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 03:52:44,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:44,525 INFO L225 Difference]: With dead ends: 12506 [2021-06-05 03:52:44,525 INFO L226 Difference]: Without dead ends: 12506 [2021-06-05 03:52:44,525 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 49.2ms TimeCoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2021-06-05 03:52:44,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12506 states. [2021-06-05 03:52:44,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12506 to 10409. [2021-06-05 03:52:44,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10409 states, 10408 states have (on average 2.5858954650269026) internal successors, (26914), 10408 states have internal predecessors, (26914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:44,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10409 states to 10409 states and 26914 transitions. [2021-06-05 03:52:44,653 INFO L78 Accepts]: Start accepts. Automaton has 10409 states and 26914 transitions. Word has length 53 [2021-06-05 03:52:44,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:44,653 INFO L482 AbstractCegarLoop]: Abstraction has 10409 states and 26914 transitions. [2021-06-05 03:52:44,653 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:44,653 INFO L276 IsEmpty]: Start isEmpty. Operand 10409 states and 26914 transitions. [2021-06-05 03:52:44,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 03:52:44,660 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:44,660 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:44,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 340 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable697 [2021-06-05 03:52:44,861 INFO L430 AbstractCegarLoop]: === Iteration 349 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:44,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:44,861 INFO L82 PathProgramCache]: Analyzing trace with hash 884085766, now seen corresponding path program 94 times [2021-06-05 03:52:44,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:44,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527407786] [2021-06-05 03:52:44,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:44,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:44,935 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 8 proven. 123 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:52:44,935 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:44,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527407786] [2021-06-05 03:52:44,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527407786] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:44,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568595916] [2021-06-05 03:52:44,935 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:44,964 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:52:44,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:52:44,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 03:52:44,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:45,035 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 124 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:52:45,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568595916] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:45,035 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:45,035 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 03:52:45,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895032476] [2021-06-05 03:52:45,035 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 03:52:45,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:45,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 03:52:45,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-05 03:52:45,036 INFO L87 Difference]: Start difference. First operand 10409 states and 26914 transitions. Second operand has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:45,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:45,420 INFO L93 Difference]: Finished difference Result 11786 states and 29613 transitions. [2021-06-05 03:52:45,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 03:52:45,420 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 03:52:45,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:45,432 INFO L225 Difference]: With dead ends: 11786 [2021-06-05 03:52:45,432 INFO L226 Difference]: Without dead ends: 11771 [2021-06-05 03:52:45,432 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 114.4ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:52:45,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11771 states. [2021-06-05 03:52:45,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11771 to 10612. [2021-06-05 03:52:45,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10612 states, 10611 states have (on average 2.5817547827725944) internal successors, (27395), 10611 states have internal predecessors, (27395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:45,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10612 states to 10612 states and 27395 transitions. [2021-06-05 03:52:45,556 INFO L78 Accepts]: Start accepts. Automaton has 10612 states and 27395 transitions. Word has length 53 [2021-06-05 03:52:45,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:45,556 INFO L482 AbstractCegarLoop]: Abstraction has 10612 states and 27395 transitions. [2021-06-05 03:52:45,556 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:45,556 INFO L276 IsEmpty]: Start isEmpty. Operand 10612 states and 27395 transitions. [2021-06-05 03:52:45,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 03:52:45,563 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:45,563 INFO L521 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:45,763 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 341 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable698 [2021-06-05 03:52:45,764 INFO L430 AbstractCegarLoop]: === Iteration 350 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:45,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:45,764 INFO L82 PathProgramCache]: Analyzing trace with hash -669611091, now seen corresponding path program 197 times [2021-06-05 03:52:45,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:45,764 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304482449] [2021-06-05 03:52:45,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:45,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:45,813 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 58 proven. 74 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 03:52:45,813 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:45,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304482449] [2021-06-05 03:52:45,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304482449] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:45,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693306564] [2021-06-05 03:52:45,813 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:45,842 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-06-05 03:52:45,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:52:45,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 03:52:45,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:45,924 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 61 proven. 74 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:52:45,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693306564] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:45,924 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:45,924 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12] total 12 [2021-06-05 03:52:45,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758680204] [2021-06-05 03:52:45,924 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 03:52:45,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:45,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 03:52:45,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:52:45,925 INFO L87 Difference]: Start difference. First operand 10612 states and 27395 transitions. Second operand has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:46,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:46,070 INFO L93 Difference]: Finished difference Result 12612 states and 31047 transitions. [2021-06-05 03:52:46,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 03:52:46,070 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 03:52:46,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:46,082 INFO L225 Difference]: With dead ends: 12612 [2021-06-05 03:52:46,082 INFO L226 Difference]: Without dead ends: 12609 [2021-06-05 03:52:46,082 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 60.7ms TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:52:46,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12609 states. [2021-06-05 03:52:46,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12609 to 10610. [2021-06-05 03:52:46,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10610 states, 10609 states have (on average 2.5811103779809597) internal successors, (27383), 10609 states have internal predecessors, (27383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:46,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10610 states to 10610 states and 27383 transitions. [2021-06-05 03:52:46,208 INFO L78 Accepts]: Start accepts. Automaton has 10610 states and 27383 transitions. Word has length 53 [2021-06-05 03:52:46,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:46,208 INFO L482 AbstractCegarLoop]: Abstraction has 10610 states and 27383 transitions. [2021-06-05 03:52:46,208 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:46,208 INFO L276 IsEmpty]: Start isEmpty. Operand 10610 states and 27383 transitions. [2021-06-05 03:52:46,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 03:52:46,215 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:46,215 INFO L521 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:46,415 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable699,342 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:46,416 INFO L430 AbstractCegarLoop]: === Iteration 351 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:46,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:46,416 INFO L82 PathProgramCache]: Analyzing trace with hash -462548525, now seen corresponding path program 198 times [2021-06-05 03:52:46,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:46,416 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996639783] [2021-06-05 03:52:46,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:46,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:46,471 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 51 proven. 80 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 03:52:46,472 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:46,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996639783] [2021-06-05 03:52:46,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996639783] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:46,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953099941] [2021-06-05 03:52:46,472 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:46,500 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-06-05 03:52:46,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:52:46,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 03:52:46,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:46,568 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 51 proven. 80 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 03:52:46,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953099941] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:46,568 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:46,568 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 03:52:46,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142940370] [2021-06-05 03:52:46,568 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 03:52:46,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:46,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 03:52:46,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-06-05 03:52:46,569 INFO L87 Difference]: Start difference. First operand 10610 states and 27383 transitions. Second operand has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:46,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:46,720 INFO L93 Difference]: Finished difference Result 12493 states and 30763 transitions. [2021-06-05 03:52:46,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 03:52:46,720 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 03:52:46,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:46,732 INFO L225 Difference]: With dead ends: 12493 [2021-06-05 03:52:46,732 INFO L226 Difference]: Without dead ends: 12475 [2021-06-05 03:52:46,732 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 65.0ms TimeCoverageRelationStatistics Valid=74, Invalid=108, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:52:46,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12475 states. [2021-06-05 03:52:46,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12475 to 10610. [2021-06-05 03:52:46,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10610 states, 10609 states have (on average 2.578942407389952) internal successors, (27360), 10609 states have internal predecessors, (27360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:46,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10610 states to 10610 states and 27360 transitions. [2021-06-05 03:52:46,894 INFO L78 Accepts]: Start accepts. Automaton has 10610 states and 27360 transitions. Word has length 53 [2021-06-05 03:52:46,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:46,894 INFO L482 AbstractCegarLoop]: Abstraction has 10610 states and 27360 transitions. [2021-06-05 03:52:46,894 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:46,894 INFO L276 IsEmpty]: Start isEmpty. Operand 10610 states and 27360 transitions. [2021-06-05 03:52:46,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 03:52:46,901 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:46,902 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:47,102 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 343 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable701 [2021-06-05 03:52:47,102 INFO L430 AbstractCegarLoop]: === Iteration 352 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:47,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:47,102 INFO L82 PathProgramCache]: Analyzing trace with hash -1910548538, now seen corresponding path program 199 times [2021-06-05 03:52:47,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:47,102 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124641256] [2021-06-05 03:52:47,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:47,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:47,172 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 18 proven. 113 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:52:47,172 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:47,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124641256] [2021-06-05 03:52:47,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124641256] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:47,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656901850] [2021-06-05 03:52:47,172 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:47,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:47,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 03:52:47,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:47,279 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 13 proven. 118 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:52:47,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656901850] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:47,279 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:47,279 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 03:52:47,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55357335] [2021-06-05 03:52:47,279 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 03:52:47,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:47,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 03:52:47,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-05 03:52:47,280 INFO L87 Difference]: Start difference. First operand 10610 states and 27360 transitions. Second operand has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:47,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:47,828 INFO L93 Difference]: Finished difference Result 11446 states and 28816 transitions. [2021-06-05 03:52:47,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 03:52:47,828 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 03:52:47,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:47,841 INFO L225 Difference]: With dead ends: 11446 [2021-06-05 03:52:47,841 INFO L226 Difference]: Without dead ends: 11336 [2021-06-05 03:52:47,841 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 113.8ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:52:47,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11336 states. [2021-06-05 03:52:47,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11336 to 10627. [2021-06-05 03:52:47,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10627 states, 10626 states have (on average 2.569734613212874) internal successors, (27306), 10626 states have internal predecessors, (27306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:47,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10627 states to 10627 states and 27306 transitions. [2021-06-05 03:52:47,965 INFO L78 Accepts]: Start accepts. Automaton has 10627 states and 27306 transitions. Word has length 53 [2021-06-05 03:52:47,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:47,965 INFO L482 AbstractCegarLoop]: Abstraction has 10627 states and 27306 transitions. [2021-06-05 03:52:47,965 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:47,965 INFO L276 IsEmpty]: Start isEmpty. Operand 10627 states and 27306 transitions. [2021-06-05 03:52:47,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 03:52:47,972 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:47,972 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:48,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable704,344 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:48,172 INFO L430 AbstractCegarLoop]: === Iteration 353 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:48,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:48,172 INFO L82 PathProgramCache]: Analyzing trace with hash 1770882578, now seen corresponding path program 200 times [2021-06-05 03:52:48,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:48,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714989010] [2021-06-05 03:52:48,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:48,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:48,247 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 114 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 03:52:48,247 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:48,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714989010] [2021-06-05 03:52:48,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714989010] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:48,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329888070] [2021-06-05 03:52:48,247 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:48,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:52:48,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:52:48,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 03:52:48,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:48,343 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 115 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 03:52:48,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329888070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:48,344 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:48,344 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 03:52:48,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449946747] [2021-06-05 03:52:48,344 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 03:52:48,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:48,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 03:52:48,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-05 03:52:48,344 INFO L87 Difference]: Start difference. First operand 10627 states and 27306 transitions. Second operand has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:48,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:48,751 INFO L93 Difference]: Finished difference Result 11964 states and 29958 transitions. [2021-06-05 03:52:48,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 03:52:48,751 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 03:52:48,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:48,763 INFO L225 Difference]: With dead ends: 11964 [2021-06-05 03:52:48,763 INFO L226 Difference]: Without dead ends: 11952 [2021-06-05 03:52:48,763 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 115.2ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:52:48,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11952 states. [2021-06-05 03:52:48,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11952 to 10745. [2021-06-05 03:52:48,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10745 states, 10744 states have (on average 2.5690618019359643) internal successors, (27602), 10744 states have internal predecessors, (27602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:48,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10745 states to 10745 states and 27602 transitions. [2021-06-05 03:52:48,900 INFO L78 Accepts]: Start accepts. Automaton has 10745 states and 27602 transitions. Word has length 53 [2021-06-05 03:52:48,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:48,900 INFO L482 AbstractCegarLoop]: Abstraction has 10745 states and 27602 transitions. [2021-06-05 03:52:48,900 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:48,900 INFO L276 IsEmpty]: Start isEmpty. Operand 10745 states and 27602 transitions. [2021-06-05 03:52:48,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 03:52:48,907 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:48,907 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:49,108 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 345 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable705 [2021-06-05 03:52:49,108 INFO L430 AbstractCegarLoop]: === Iteration 354 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:49,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:49,108 INFO L82 PathProgramCache]: Analyzing trace with hash -382167384, now seen corresponding path program 201 times [2021-06-05 03:52:49,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:49,108 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499803758] [2021-06-05 03:52:49,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:49,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:49,183 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 116 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:52:49,183 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:49,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499803758] [2021-06-05 03:52:49,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499803758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:49,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358343866] [2021-06-05 03:52:49,184 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:49,213 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-06-05 03:52:49,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:52:49,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 03:52:49,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:49,284 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 117 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:52:49,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358343866] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:49,284 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:49,284 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 03:52:49,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685433474] [2021-06-05 03:52:49,284 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 03:52:49,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:49,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 03:52:49,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:52:49,284 INFO L87 Difference]: Start difference. First operand 10745 states and 27602 transitions. Second operand has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:49,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:49,891 INFO L93 Difference]: Finished difference Result 13743 states and 33934 transitions. [2021-06-05 03:52:49,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 03:52:49,892 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 03:52:49,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:49,905 INFO L225 Difference]: With dead ends: 13743 [2021-06-05 03:52:49,905 INFO L226 Difference]: Without dead ends: 13689 [2021-06-05 03:52:49,905 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 207.1ms TimeCoverageRelationStatistics Valid=111, Invalid=701, Unknown=0, NotChecked=0, Total=812 [2021-06-05 03:52:49,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13689 states. [2021-06-05 03:52:50,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13689 to 11094. [2021-06-05 03:52:50,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11094 states, 11093 states have (on average 2.5733345352925268) internal successors, (28546), 11093 states have internal predecessors, (28546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:50,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11094 states to 11094 states and 28546 transitions. [2021-06-05 03:52:50,062 INFO L78 Accepts]: Start accepts. Automaton has 11094 states and 28546 transitions. Word has length 53 [2021-06-05 03:52:50,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:50,062 INFO L482 AbstractCegarLoop]: Abstraction has 11094 states and 28546 transitions. [2021-06-05 03:52:50,063 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:50,063 INFO L276 IsEmpty]: Start isEmpty. Operand 11094 states and 28546 transitions. [2021-06-05 03:52:50,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 03:52:50,070 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:50,070 INFO L521 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:50,270 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable706,346 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:50,270 INFO L430 AbstractCegarLoop]: === Iteration 355 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:50,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:50,270 INFO L82 PathProgramCache]: Analyzing trace with hash 1150391725, now seen corresponding path program 202 times [2021-06-05 03:52:50,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:50,270 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599682216] [2021-06-05 03:52:50,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:50,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:50,334 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 40 proven. 94 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:52:50,334 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:50,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599682216] [2021-06-05 03:52:50,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599682216] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:50,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954861083] [2021-06-05 03:52:50,335 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:50,360 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:52:50,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:52:50,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 03:52:50,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:50,430 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 40 proven. 94 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:52:50,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954861083] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:50,430 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:50,430 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 03:52:50,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484425503] [2021-06-05 03:52:50,430 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 03:52:50,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:50,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 03:52:50,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:52:50,430 INFO L87 Difference]: Start difference. First operand 11094 states and 28546 transitions. Second operand has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:50,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:50,590 INFO L93 Difference]: Finished difference Result 13092 states and 32135 transitions. [2021-06-05 03:52:50,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 03:52:50,590 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 03:52:50,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:50,602 INFO L225 Difference]: With dead ends: 13092 [2021-06-05 03:52:50,602 INFO L226 Difference]: Without dead ends: 13068 [2021-06-05 03:52:50,603 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 74.1ms TimeCoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:52:50,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13068 states. [2021-06-05 03:52:50,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13068 to 11094. [2021-06-05 03:52:50,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11094 states, 11093 states have (on average 2.571802037320833) internal successors, (28529), 11093 states have internal predecessors, (28529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:50,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11094 states to 11094 states and 28529 transitions. [2021-06-05 03:52:50,738 INFO L78 Accepts]: Start accepts. Automaton has 11094 states and 28529 transitions. Word has length 53 [2021-06-05 03:52:50,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:50,738 INFO L482 AbstractCegarLoop]: Abstraction has 11094 states and 28529 transitions. [2021-06-05 03:52:50,738 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:50,738 INFO L276 IsEmpty]: Start isEmpty. Operand 11094 states and 28529 transitions. [2021-06-05 03:52:50,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 03:52:50,745 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:50,745 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:50,945 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable707,347 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:50,946 INFO L430 AbstractCegarLoop]: === Iteration 356 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:50,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:50,946 INFO L82 PathProgramCache]: Analyzing trace with hash -227330850, now seen corresponding path program 203 times [2021-06-05 03:52:50,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:50,946 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505824050] [2021-06-05 03:52:50,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:50,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:51,027 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 116 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:52:51,027 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:51,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505824050] [2021-06-05 03:52:51,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505824050] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:51,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300574819] [2021-06-05 03:52:51,027 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:51,056 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-06-05 03:52:51,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:52:51,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 03:52:51,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:51,126 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 117 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:52:51,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300574819] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:51,126 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:51,126 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 03:52:51,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456432863] [2021-06-05 03:52:51,126 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 03:52:51,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:51,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 03:52:51,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:52:51,126 INFO L87 Difference]: Start difference. First operand 11094 states and 28529 transitions. Second operand has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:52,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:52,045 INFO L93 Difference]: Finished difference Result 17716 states and 42908 transitions. [2021-06-05 03:52:52,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 03:52:52,046 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 03:52:52,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:52,063 INFO L225 Difference]: With dead ends: 17716 [2021-06-05 03:52:52,063 INFO L226 Difference]: Without dead ends: 17548 [2021-06-05 03:52:52,064 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 400.3ms TimeCoverageRelationStatistics Valid=273, Invalid=2079, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 03:52:52,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17548 states. [2021-06-05 03:52:52,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17548 to 11789. [2021-06-05 03:52:52,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11789 states, 11788 states have (on average 2.574737020699016) internal successors, (30351), 11788 states have internal predecessors, (30351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:52,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11789 states to 11789 states and 30351 transitions. [2021-06-05 03:52:52,229 INFO L78 Accepts]: Start accepts. Automaton has 11789 states and 30351 transitions. Word has length 53 [2021-06-05 03:52:52,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:52,229 INFO L482 AbstractCegarLoop]: Abstraction has 11789 states and 30351 transitions. [2021-06-05 03:52:52,229 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:52,229 INFO L276 IsEmpty]: Start isEmpty. Operand 11789 states and 30351 transitions. [2021-06-05 03:52:52,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 03:52:52,236 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:52,236 INFO L521 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:52,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable711,348 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:52,437 INFO L430 AbstractCegarLoop]: === Iteration 357 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:52,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:52,437 INFO L82 PathProgramCache]: Analyzing trace with hash 159271827, now seen corresponding path program 204 times [2021-06-05 03:52:52,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:52,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267759307] [2021-06-05 03:52:52,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:52,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:52,510 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 35 proven. 99 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:52:52,510 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:52,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267759307] [2021-06-05 03:52:52,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267759307] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:52,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594967895] [2021-06-05 03:52:52,510 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:52,540 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-06-05 03:52:52,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:52:52,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 03:52:52,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:52,609 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 35 proven. 99 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:52:52,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594967895] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:52,609 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:52,609 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-06-05 03:52:52,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940252916] [2021-06-05 03:52:52,610 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 03:52:52,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:52,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 03:52:52,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:52:52,610 INFO L87 Difference]: Start difference. First operand 11789 states and 30351 transitions. Second operand has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:52,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:52,793 INFO L93 Difference]: Finished difference Result 13934 states and 34216 transitions. [2021-06-05 03:52:52,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 03:52:52,793 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 03:52:52,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:52,836 INFO L225 Difference]: With dead ends: 13934 [2021-06-05 03:52:52,837 INFO L226 Difference]: Without dead ends: 13901 [2021-06-05 03:52:52,837 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 90.0ms TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:52:52,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13901 states. [2021-06-05 03:52:52,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13901 to 11789. [2021-06-05 03:52:52,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11789 states, 11788 states have (on average 2.5739735324058364) internal successors, (30342), 11788 states have internal predecessors, (30342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:52,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11789 states to 11789 states and 30342 transitions. [2021-06-05 03:52:52,973 INFO L78 Accepts]: Start accepts. Automaton has 11789 states and 30342 transitions. Word has length 53 [2021-06-05 03:52:52,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:52,973 INFO L482 AbstractCegarLoop]: Abstraction has 11789 states and 30342 transitions. [2021-06-05 03:52:52,974 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:52,974 INFO L276 IsEmpty]: Start isEmpty. Operand 11789 states and 30342 transitions. [2021-06-05 03:52:52,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 03:52:52,981 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:52,981 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:53,181 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable712,349 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:53,181 INFO L430 AbstractCegarLoop]: === Iteration 358 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:53,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:53,182 INFO L82 PathProgramCache]: Analyzing trace with hash -287022360, now seen corresponding path program 205 times [2021-06-05 03:52:53,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:53,182 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995594754] [2021-06-05 03:52:53,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:53,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:53,272 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 116 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:52:53,272 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:53,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995594754] [2021-06-05 03:52:53,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995594754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:53,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768315437] [2021-06-05 03:52:53,272 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:53,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:53,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 03:52:53,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:53,367 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 117 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:52:53,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768315437] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:53,367 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:53,367 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 03:52:53,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949460092] [2021-06-05 03:52:53,368 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:52:53,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:53,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:52:53,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:52:53,368 INFO L87 Difference]: Start difference. First operand 11789 states and 30342 transitions. Second operand has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:54,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:54,732 INFO L93 Difference]: Finished difference Result 26526 states and 62830 transitions. [2021-06-05 03:52:54,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-06-05 03:52:54,732 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 03:52:54,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:54,764 INFO L225 Difference]: With dead ends: 26526 [2021-06-05 03:52:54,764 INFO L226 Difference]: Without dead ends: 26004 [2021-06-05 03:52:54,765 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2275 ImplicationChecksByTransitivity, 786.2ms TimeCoverageRelationStatistics Valid=651, Invalid=5829, Unknown=0, NotChecked=0, Total=6480 [2021-06-05 03:52:54,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26004 states. [2021-06-05 03:52:54,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26004 to 12945. [2021-06-05 03:52:54,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12945 states, 12944 states have (on average 2.575324474660074) internal successors, (33335), 12944 states have internal predecessors, (33335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:55,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12945 states to 12945 states and 33335 transitions. [2021-06-05 03:52:55,010 INFO L78 Accepts]: Start accepts. Automaton has 12945 states and 33335 transitions. Word has length 53 [2021-06-05 03:52:55,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:55,011 INFO L482 AbstractCegarLoop]: Abstraction has 12945 states and 33335 transitions. [2021-06-05 03:52:55,011 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:55,011 INFO L276 IsEmpty]: Start isEmpty. Operand 12945 states and 33335 transitions. [2021-06-05 03:52:55,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 03:52:55,019 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:55,019 INFO L521 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:55,219 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable717,350 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:55,219 INFO L430 AbstractCegarLoop]: === Iteration 359 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:55,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:55,219 INFO L82 PathProgramCache]: Analyzing trace with hash 1606550509, now seen corresponding path program 206 times [2021-06-05 03:52:55,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:55,219 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4138524] [2021-06-05 03:52:55,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:55,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:55,300 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 36 proven. 98 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:52:55,301 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:55,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4138524] [2021-06-05 03:52:55,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4138524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:55,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429213279] [2021-06-05 03:52:55,301 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:55,326 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:52:55,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:52:55,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 03:52:55,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:55,397 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 36 proven. 98 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:52:55,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429213279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:55,397 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:55,397 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-06-05 03:52:55,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060681590] [2021-06-05 03:52:55,398 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:52:55,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:55,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:52:55,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:52:55,398 INFO L87 Difference]: Start difference. First operand 12945 states and 33335 transitions. Second operand has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:55,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:55,645 INFO L93 Difference]: Finished difference Result 15322 states and 37639 transitions. [2021-06-05 03:52:55,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 03:52:55,645 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 03:52:55,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:55,661 INFO L225 Difference]: With dead ends: 15322 [2021-06-05 03:52:55,661 INFO L226 Difference]: Without dead ends: 15280 [2021-06-05 03:52:55,661 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 108.9ms TimeCoverageRelationStatistics Valid=115, Invalid=227, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:52:55,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15280 states. [2021-06-05 03:52:55,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15280 to 12945. [2021-06-05 03:52:55,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12945 states, 12944 states have (on average 2.574629171817058) internal successors, (33326), 12944 states have internal predecessors, (33326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:55,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12945 states to 12945 states and 33326 transitions. [2021-06-05 03:52:55,853 INFO L78 Accepts]: Start accepts. Automaton has 12945 states and 33326 transitions. Word has length 53 [2021-06-05 03:52:55,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:55,853 INFO L482 AbstractCegarLoop]: Abstraction has 12945 states and 33326 transitions. [2021-06-05 03:52:55,853 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:55,853 INFO L276 IsEmpty]: Start isEmpty. Operand 12945 states and 33326 transitions. [2021-06-05 03:52:55,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 03:52:55,860 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:55,860 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:56,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable718,351 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:56,061 INFO L430 AbstractCegarLoop]: === Iteration 360 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:56,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:56,061 INFO L82 PathProgramCache]: Analyzing trace with hash -440336226, now seen corresponding path program 207 times [2021-06-05 03:52:56,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:56,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266921757] [2021-06-05 03:52:56,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:56,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:56,162 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 116 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:52:56,162 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:56,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266921757] [2021-06-05 03:52:56,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266921757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:56,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966927950] [2021-06-05 03:52:56,162 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:56,191 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-06-05 03:52:56,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:52:56,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 03:52:56,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:56,261 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 117 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:52:56,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966927950] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:56,261 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:56,261 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 03:52:56,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700154439] [2021-06-05 03:52:56,261 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 03:52:56,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:56,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 03:52:56,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:52:56,261 INFO L87 Difference]: Start difference. First operand 12945 states and 33326 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:58,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:58,365 INFO L93 Difference]: Finished difference Result 33896 states and 80215 transitions. [2021-06-05 03:52:58,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2021-06-05 03:52:58,365 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 03:52:58,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:58,405 INFO L225 Difference]: With dead ends: 33896 [2021-06-05 03:52:58,405 INFO L226 Difference]: Without dead ends: 33278 [2021-06-05 03:52:58,406 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6564 ImplicationChecksByTransitivity, 1462.2ms TimeCoverageRelationStatistics Valid=1461, Invalid=15051, Unknown=0, NotChecked=0, Total=16512 [2021-06-05 03:52:58,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33278 states. [2021-06-05 03:52:58,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33278 to 13864. [2021-06-05 03:52:58,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13864 states, 13863 states have (on average 2.5749116352881773) internal successors, (35696), 13863 states have internal predecessors, (35696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:58,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13864 states to 13864 states and 35696 transitions. [2021-06-05 03:52:58,732 INFO L78 Accepts]: Start accepts. Automaton has 13864 states and 35696 transitions. Word has length 53 [2021-06-05 03:52:58,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:58,732 INFO L482 AbstractCegarLoop]: Abstraction has 13864 states and 35696 transitions. [2021-06-05 03:52:58,732 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:58,732 INFO L276 IsEmpty]: Start isEmpty. Operand 13864 states and 35696 transitions. [2021-06-05 03:52:58,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 03:52:58,739 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:58,740 INFO L521 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:58,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable724,352 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:58,940 INFO L430 AbstractCegarLoop]: === Iteration 361 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:58,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:58,940 INFO L82 PathProgramCache]: Analyzing trace with hash 309081427, now seen corresponding path program 208 times [2021-06-05 03:52:58,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:58,940 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770436436] [2021-06-05 03:52:58,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:58,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:59,031 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 43 proven. 91 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:52:59,031 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:59,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770436436] [2021-06-05 03:52:59,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770436436] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:59,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091548077] [2021-06-05 03:52:59,031 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:59,057 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:52:59,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:52:59,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 03:52:59,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:59,128 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 43 proven. 91 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:52:59,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091548077] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:59,128 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:59,128 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-06-05 03:52:59,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490259632] [2021-06-05 03:52:59,129 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 03:52:59,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:59,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 03:52:59,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:52:59,129 INFO L87 Difference]: Start difference. First operand 13864 states and 35696 transitions. Second operand has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:59,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:52:59,364 INFO L93 Difference]: Finished difference Result 16347 states and 40212 transitions. [2021-06-05 03:52:59,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 03:52:59,364 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 03:52:59,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:52:59,383 INFO L225 Difference]: With dead ends: 16347 [2021-06-05 03:52:59,383 INFO L226 Difference]: Without dead ends: 16296 [2021-06-05 03:52:59,383 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 127.7ms TimeCoverageRelationStatistics Valid=137, Invalid=283, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:52:59,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16296 states. [2021-06-05 03:52:59,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16296 to 13554. [2021-06-05 03:52:59,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13554 states, 13553 states have (on average 2.570353427285472) internal successors, (34836), 13553 states have internal predecessors, (34836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:59,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13554 states to 13554 states and 34836 transitions. [2021-06-05 03:52:59,572 INFO L78 Accepts]: Start accepts. Automaton has 13554 states and 34836 transitions. Word has length 53 [2021-06-05 03:52:59,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:52:59,572 INFO L482 AbstractCegarLoop]: Abstraction has 13554 states and 34836 transitions. [2021-06-05 03:52:59,572 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:52:59,572 INFO L276 IsEmpty]: Start isEmpty. Operand 13554 states and 34836 transitions. [2021-06-05 03:52:59,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 03:52:59,580 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:52:59,580 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:52:59,782 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable725,353 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:59,782 INFO L430 AbstractCegarLoop]: === Iteration 362 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:52:59,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:52:59,782 INFO L82 PathProgramCache]: Analyzing trace with hash 2031484712, now seen corresponding path program 209 times [2021-06-05 03:52:59,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:52:59,782 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590740149] [2021-06-05 03:52:59,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:52:59,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:52:59,893 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 119 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:52:59,894 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:52:59,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590740149] [2021-06-05 03:52:59,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590740149] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:59,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597222625] [2021-06-05 03:52:59,894 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:52:59,924 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-06-05 03:52:59,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:52:59,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 03:52:59,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:52:59,992 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 119 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:52:59,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597222625] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:52:59,992 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:52:59,992 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 03:52:59,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492162112] [2021-06-05 03:52:59,993 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:52:59,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:52:59,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:52:59,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:52:59,993 INFO L87 Difference]: Start difference. First operand 13554 states and 34836 transitions. Second operand has 16 states, 16 states have (on average 3.375) internal successors, (54), 15 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:00,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:00,655 INFO L93 Difference]: Finished difference Result 18422 states and 44497 transitions. [2021-06-05 03:53:00,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 03:53:00,655 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 15 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 03:53:00,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:00,674 INFO L225 Difference]: With dead ends: 18422 [2021-06-05 03:53:00,674 INFO L226 Difference]: Without dead ends: 17582 [2021-06-05 03:53:00,674 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 303.8ms TimeCoverageRelationStatistics Valid=175, Invalid=881, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 03:53:00,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17582 states. [2021-06-05 03:53:00,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17582 to 10239. [2021-06-05 03:53:00,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10239 states, 10238 states have (on average 2.551279546786482) internal successors, (26120), 10238 states have internal predecessors, (26120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:00,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10239 states to 10239 states and 26120 transitions. [2021-06-05 03:53:00,825 INFO L78 Accepts]: Start accepts. Automaton has 10239 states and 26120 transitions. Word has length 53 [2021-06-05 03:53:00,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:00,825 INFO L482 AbstractCegarLoop]: Abstraction has 10239 states and 26120 transitions. [2021-06-05 03:53:00,825 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 15 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:00,825 INFO L276 IsEmpty]: Start isEmpty. Operand 10239 states and 26120 transitions. [2021-06-05 03:53:00,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 03:53:00,832 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:00,832 INFO L521 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:01,032 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable732,354 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:01,033 INFO L430 AbstractCegarLoop]: === Iteration 363 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:01,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:01,033 INFO L82 PathProgramCache]: Analyzing trace with hash 1793423195, now seen corresponding path program 95 times [2021-06-05 03:53:01,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:01,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614700441] [2021-06-05 03:53:01,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:01,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:01,089 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 100 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:53:01,090 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:01,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614700441] [2021-06-05 03:53:01,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614700441] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:01,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747376616] [2021-06-05 03:53:01,090 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:01,122 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-06-05 03:53:01,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:01,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 03:53:01,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:01,228 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 100 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:53:01,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747376616] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:01,228 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:01,228 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 18 [2021-06-05 03:53:01,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102397790] [2021-06-05 03:53:01,229 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:53:01,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:01,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:53:01,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=215, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:53:01,229 INFO L87 Difference]: Start difference. First operand 10239 states and 26120 transitions. Second operand has 19 states, 19 states have (on average 4.315789473684211) internal successors, (82), 18 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:01,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:01,538 INFO L93 Difference]: Finished difference Result 12499 states and 30979 transitions. [2021-06-05 03:53:01,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 03:53:01,538 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.315789473684211) internal successors, (82), 18 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 03:53:01,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:01,548 INFO L225 Difference]: With dead ends: 12499 [2021-06-05 03:53:01,548 INFO L226 Difference]: Without dead ends: 12485 [2021-06-05 03:53:01,549 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 101.9ms TimeCoverageRelationStatistics Valid=148, Invalid=272, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:53:01,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12485 states. [2021-06-05 03:53:01,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12485 to 10638. [2021-06-05 03:53:01,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10638 states, 10637 states have (on average 2.5578640594152486) internal successors, (27208), 10637 states have internal predecessors, (27208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:01,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10638 states to 10638 states and 27208 transitions. [2021-06-05 03:53:01,674 INFO L78 Accepts]: Start accepts. Automaton has 10638 states and 27208 transitions. Word has length 53 [2021-06-05 03:53:01,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:01,674 INFO L482 AbstractCegarLoop]: Abstraction has 10638 states and 27208 transitions. [2021-06-05 03:53:01,674 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.315789473684211) internal successors, (82), 18 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:01,674 INFO L276 IsEmpty]: Start isEmpty. Operand 10638 states and 27208 transitions. [2021-06-05 03:53:01,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 03:53:01,681 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:01,681 INFO L521 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:01,881 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 355 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable733 [2021-06-05 03:53:01,881 INFO L430 AbstractCegarLoop]: === Iteration 364 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:01,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:01,881 INFO L82 PathProgramCache]: Analyzing trace with hash 1171542785, now seen corresponding path program 96 times [2021-06-05 03:53:01,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:01,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441125820] [2021-06-05 03:53:01,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:01,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:01,939 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 100 proven. 34 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:53:01,939 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:01,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441125820] [2021-06-05 03:53:01,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441125820] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:01,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246607737] [2021-06-05 03:53:01,939 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:01,967 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-06-05 03:53:01,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:01,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 03:53:01,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:02,041 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 101 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:53:02,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246607737] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:02,041 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:02,041 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 11 [2021-06-05 03:53:02,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372484140] [2021-06-05 03:53:02,042 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 03:53:02,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:02,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 03:53:02,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:53:02,042 INFO L87 Difference]: Start difference. First operand 10638 states and 27208 transitions. Second operand has 12 states, 12 states have (on average 4.75) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:02,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:02,286 INFO L93 Difference]: Finished difference Result 14368 states and 35164 transitions. [2021-06-05 03:53:02,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 03:53:02,286 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 03:53:02,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:02,300 INFO L225 Difference]: With dead ends: 14368 [2021-06-05 03:53:02,300 INFO L226 Difference]: Without dead ends: 14368 [2021-06-05 03:53:02,300 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 95.2ms TimeCoverageRelationStatistics Valid=128, Invalid=178, Unknown=0, NotChecked=0, Total=306 [2021-06-05 03:53:02,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14368 states. [2021-06-05 03:53:02,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14368 to 10646. [2021-06-05 03:53:02,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10646 states, 10645 states have (on average 2.558290277125411) internal successors, (27233), 10645 states have internal predecessors, (27233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:02,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10646 states to 10646 states and 27233 transitions. [2021-06-05 03:53:02,436 INFO L78 Accepts]: Start accepts. Automaton has 10646 states and 27233 transitions. Word has length 53 [2021-06-05 03:53:02,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:02,437 INFO L482 AbstractCegarLoop]: Abstraction has 10646 states and 27233 transitions. [2021-06-05 03:53:02,437 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:02,437 INFO L276 IsEmpty]: Start isEmpty. Operand 10646 states and 27233 transitions. [2021-06-05 03:53:02,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 03:53:02,443 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:02,444 INFO L521 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:02,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable735,356 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:02,644 INFO L430 AbstractCegarLoop]: === Iteration 365 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:02,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:02,644 INFO L82 PathProgramCache]: Analyzing trace with hash -466029671, now seen corresponding path program 97 times [2021-06-05 03:53:02,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:02,644 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351665078] [2021-06-05 03:53:02,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:02,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:02,709 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 100 proven. 34 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:53:02,709 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:02,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351665078] [2021-06-05 03:53:02,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351665078] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:02,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382138832] [2021-06-05 03:53:02,709 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:02,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:02,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 03:53:02,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:02,808 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 101 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:53:02,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382138832] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:02,808 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:02,808 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 12 [2021-06-05 03:53:02,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361064544] [2021-06-05 03:53:02,808 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 03:53:02,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:02,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 03:53:02,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:53:02,809 INFO L87 Difference]: Start difference. First operand 10646 states and 27233 transitions. Second operand has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 12 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:03,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:03,138 INFO L93 Difference]: Finished difference Result 15753 states and 38328 transitions. [2021-06-05 03:53:03,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 03:53:03,138 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 12 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 03:53:03,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:03,155 INFO L225 Difference]: With dead ends: 15753 [2021-06-05 03:53:03,155 INFO L226 Difference]: Without dead ends: 15753 [2021-06-05 03:53:03,155 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 142.9ms TimeCoverageRelationStatistics Valid=216, Invalid=336, Unknown=0, NotChecked=0, Total=552 [2021-06-05 03:53:03,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15753 states. [2021-06-05 03:53:03,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15753 to 10665. [2021-06-05 03:53:03,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10665 states, 10664 states have (on average 2.559358589647412) internal successors, (27293), 10664 states have internal predecessors, (27293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:03,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10665 states to 10665 states and 27293 transitions. [2021-06-05 03:53:03,306 INFO L78 Accepts]: Start accepts. Automaton has 10665 states and 27293 transitions. Word has length 53 [2021-06-05 03:53:03,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:03,306 INFO L482 AbstractCegarLoop]: Abstraction has 10665 states and 27293 transitions. [2021-06-05 03:53:03,306 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 12 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:03,306 INFO L276 IsEmpty]: Start isEmpty. Operand 10665 states and 27293 transitions. [2021-06-05 03:53:03,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 03:53:03,313 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:03,313 INFO L521 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:03,513 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 357 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable736 [2021-06-05 03:53:03,514 INFO L430 AbstractCegarLoop]: === Iteration 366 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:03,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:03,514 INFO L82 PathProgramCache]: Analyzing trace with hash 2138942461, now seen corresponding path program 98 times [2021-06-05 03:53:03,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:03,514 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333291878] [2021-06-05 03:53:03,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:03,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:03,589 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 96 proven. 38 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:53:03,589 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:03,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333291878] [2021-06-05 03:53:03,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333291878] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:03,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141468570] [2021-06-05 03:53:03,589 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:03,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:53:03,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:03,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 03:53:03,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:03,691 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 97 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:53:03,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141468570] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:03,691 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:03,692 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2021-06-05 03:53:03,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398963763] [2021-06-05 03:53:03,692 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:53:03,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:03,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:53:03,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:53:03,692 INFO L87 Difference]: Start difference. First operand 10665 states and 27293 transitions. Second operand has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 13 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:04,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:04,083 INFO L93 Difference]: Finished difference Result 16162 states and 39295 transitions. [2021-06-05 03:53:04,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 03:53:04,083 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 13 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 03:53:04,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:04,101 INFO L225 Difference]: With dead ends: 16162 [2021-06-05 03:53:04,101 INFO L226 Difference]: Without dead ends: 16162 [2021-06-05 03:53:04,101 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 184.0ms TimeCoverageRelationStatistics Valid=289, Invalid=467, Unknown=0, NotChecked=0, Total=756 [2021-06-05 03:53:04,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16162 states. [2021-06-05 03:53:04,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16162 to 10690. [2021-06-05 03:53:04,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10690 states, 10689 states have (on average 2.560669847506783) internal successors, (27371), 10689 states have internal predecessors, (27371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:04,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10690 states to 10690 states and 27371 transitions. [2021-06-05 03:53:04,270 INFO L78 Accepts]: Start accepts. Automaton has 10690 states and 27371 transitions. Word has length 53 [2021-06-05 03:53:04,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:04,270 INFO L482 AbstractCegarLoop]: Abstraction has 10690 states and 27371 transitions. [2021-06-05 03:53:04,270 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 13 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:04,270 INFO L276 IsEmpty]: Start isEmpty. Operand 10690 states and 27371 transitions. [2021-06-05 03:53:04,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 03:53:04,277 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:04,277 INFO L521 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:04,477 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable737,358 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:04,477 INFO L430 AbstractCegarLoop]: === Iteration 367 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:04,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:04,478 INFO L82 PathProgramCache]: Analyzing trace with hash 1099655449, now seen corresponding path program 99 times [2021-06-05 03:53:04,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:04,478 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481725823] [2021-06-05 03:53:04,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:04,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:04,565 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 92 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:53:04,565 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:04,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481725823] [2021-06-05 03:53:04,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481725823] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:04,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006749148] [2021-06-05 03:53:04,565 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:04,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-06-05 03:53:04,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:04,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 03:53:04,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:04,717 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 106 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:53:04,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006749148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:04,718 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:04,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 18 [2021-06-05 03:53:04,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497190961] [2021-06-05 03:53:04,718 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:53:04,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:04,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:53:04,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=228, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:53:04,718 INFO L87 Difference]: Start difference. First operand 10690 states and 27371 transitions. Second operand has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 18 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:05,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:05,146 INFO L93 Difference]: Finished difference Result 12484 states and 30934 transitions. [2021-06-05 03:53:05,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 03:53:05,146 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 18 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 03:53:05,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:05,159 INFO L225 Difference]: With dead ends: 12484 [2021-06-05 03:53:05,159 INFO L226 Difference]: Without dead ends: 12484 [2021-06-05 03:53:05,159 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 223.5ms TimeCoverageRelationStatistics Valid=296, Invalid=516, Unknown=0, NotChecked=0, Total=812 [2021-06-05 03:53:05,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12484 states. [2021-06-05 03:53:05,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12484 to 10077. [2021-06-05 03:53:05,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10077 states, 10076 states have (on average 2.5562723302897976) internal successors, (25757), 10076 states have internal predecessors, (25757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:05,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10077 states to 10077 states and 25757 transitions. [2021-06-05 03:53:05,283 INFO L78 Accepts]: Start accepts. Automaton has 10077 states and 25757 transitions. Word has length 53 [2021-06-05 03:53:05,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:05,283 INFO L482 AbstractCegarLoop]: Abstraction has 10077 states and 25757 transitions. [2021-06-05 03:53:05,283 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 18 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:05,283 INFO L276 IsEmpty]: Start isEmpty. Operand 10077 states and 25757 transitions. [2021-06-05 03:53:05,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 03:53:05,290 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:05,290 INFO L521 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:05,490 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 359 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable738 [2021-06-05 03:53:05,490 INFO L430 AbstractCegarLoop]: === Iteration 368 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:05,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:05,490 INFO L82 PathProgramCache]: Analyzing trace with hash 2113323565, now seen corresponding path program 210 times [2021-06-05 03:53:05,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:05,490 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134297149] [2021-06-05 03:53:05,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:05,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:05,592 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 57 proven. 78 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:53:05,592 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:05,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134297149] [2021-06-05 03:53:05,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134297149] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:05,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093533249] [2021-06-05 03:53:05,592 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:05,619 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 03:53:05,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:05,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 03:53:05,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:05,691 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 57 proven. 78 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:53:05,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093533249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:05,691 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:05,691 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-06-05 03:53:05,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745467858] [2021-06-05 03:53:05,692 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:53:05,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:05,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:53:05,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:53:05,692 INFO L87 Difference]: Start difference. First operand 10077 states and 25757 transitions. Second operand has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:05,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:05,933 INFO L93 Difference]: Finished difference Result 11675 states and 28615 transitions. [2021-06-05 03:53:05,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 03:53:05,934 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 03:53:05,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:05,944 INFO L225 Difference]: With dead ends: 11675 [2021-06-05 03:53:05,944 INFO L226 Difference]: Without dead ends: 11621 [2021-06-05 03:53:05,945 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 150.3ms TimeCoverageRelationStatistics Valid=161, Invalid=345, Unknown=0, NotChecked=0, Total=506 [2021-06-05 03:53:05,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11621 states. [2021-06-05 03:53:06,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11621 to 10086. [2021-06-05 03:53:06,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10086 states, 10085 states have (on average 2.5548834903321764) internal successors, (25766), 10085 states have internal predecessors, (25766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:06,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10086 states to 10086 states and 25766 transitions. [2021-06-05 03:53:06,062 INFO L78 Accepts]: Start accepts. Automaton has 10086 states and 25766 transitions. Word has length 53 [2021-06-05 03:53:06,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:06,062 INFO L482 AbstractCegarLoop]: Abstraction has 10086 states and 25766 transitions. [2021-06-05 03:53:06,062 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:06,062 INFO L276 IsEmpty]: Start isEmpty. Operand 10086 states and 25766 transitions. [2021-06-05 03:53:06,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 03:53:06,068 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:06,068 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:06,268 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable741,360 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:06,269 INFO L430 AbstractCegarLoop]: === Iteration 369 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:06,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:06,269 INFO L82 PathProgramCache]: Analyzing trace with hash 1980297346, now seen corresponding path program 100 times [2021-06-05 03:53:06,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:06,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852727812] [2021-06-05 03:53:06,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:06,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:06,380 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 125 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:53:06,381 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:06,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852727812] [2021-06-05 03:53:06,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852727812] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:06,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731948148] [2021-06-05 03:53:06,381 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:06,407 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:53:06,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:06,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 03:53:06,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:06,476 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 125 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:53:06,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731948148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:06,476 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:06,476 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 03:53:06,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145453060] [2021-06-05 03:53:06,476 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:53:06,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:06,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:53:06,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:53:06,476 INFO L87 Difference]: Start difference. First operand 10086 states and 25766 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:07,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:07,025 INFO L93 Difference]: Finished difference Result 14226 states and 34514 transitions. [2021-06-05 03:53:07,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 03:53:07,025 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 03:53:07,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:07,038 INFO L225 Difference]: With dead ends: 14226 [2021-06-05 03:53:07,039 INFO L226 Difference]: Without dead ends: 13952 [2021-06-05 03:53:07,039 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 304.1ms TimeCoverageRelationStatistics Valid=175, Invalid=881, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 03:53:07,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13952 states. [2021-06-05 03:53:07,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13952 to 9958. [2021-06-05 03:53:07,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9958 states, 9957 states have (on average 2.552475645274681) internal successors, (25415), 9957 states have internal predecessors, (25415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:07,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9958 states to 9958 states and 25415 transitions. [2021-06-05 03:53:07,186 INFO L78 Accepts]: Start accepts. Automaton has 9958 states and 25415 transitions. Word has length 53 [2021-06-05 03:53:07,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:07,186 INFO L482 AbstractCegarLoop]: Abstraction has 9958 states and 25415 transitions. [2021-06-05 03:53:07,186 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:07,186 INFO L276 IsEmpty]: Start isEmpty. Operand 9958 states and 25415 transitions. [2021-06-05 03:53:07,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 03:53:07,193 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:07,193 INFO L521 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:07,393 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 361 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable749 [2021-06-05 03:53:07,393 INFO L430 AbstractCegarLoop]: === Iteration 370 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:07,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:07,393 INFO L82 PathProgramCache]: Analyzing trace with hash -217067145, now seen corresponding path program 211 times [2021-06-05 03:53:07,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:07,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684823725] [2021-06-05 03:53:07,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:07,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:07,487 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 66 proven. 68 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:53:07,487 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:07,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684823725] [2021-06-05 03:53:07,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684823725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:07,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497768833] [2021-06-05 03:53:07,487 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:07,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:07,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 03:53:07,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:07,588 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 66 proven. 68 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:53:07,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497768833] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:07,588 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:07,588 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-06-05 03:53:07,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021072966] [2021-06-05 03:53:07,589 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 03:53:07,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:07,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 03:53:07,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:53:07,589 INFO L87 Difference]: Start difference. First operand 9958 states and 25415 transitions. Second operand has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:07,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:07,881 INFO L93 Difference]: Finished difference Result 12529 states and 31068 transitions. [2021-06-05 03:53:07,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 03:53:07,881 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 03:53:07,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:07,893 INFO L225 Difference]: With dead ends: 12529 [2021-06-05 03:53:07,893 INFO L226 Difference]: Without dead ends: 12529 [2021-06-05 03:53:07,893 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 161.2ms TimeCoverageRelationStatistics Valid=200, Invalid=352, Unknown=0, NotChecked=0, Total=552 [2021-06-05 03:53:07,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12529 states. [2021-06-05 03:53:07,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12529 to 10698. [2021-06-05 03:53:08,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10698 states, 10697 states have (on average 2.5853977750771246) internal successors, (27656), 10697 states have internal predecessors, (27656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:08,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10698 states to 10698 states and 27656 transitions. [2021-06-05 03:53:08,021 INFO L78 Accepts]: Start accepts. Automaton has 10698 states and 27656 transitions. Word has length 53 [2021-06-05 03:53:08,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:08,021 INFO L482 AbstractCegarLoop]: Abstraction has 10698 states and 27656 transitions. [2021-06-05 03:53:08,021 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:08,021 INFO L276 IsEmpty]: Start isEmpty. Operand 10698 states and 27656 transitions. [2021-06-05 03:53:08,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 03:53:08,027 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:08,027 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:08,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable750,362 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:08,228 INFO L430 AbstractCegarLoop]: === Iteration 371 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:08,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:08,228 INFO L82 PathProgramCache]: Analyzing trace with hash 2097202474, now seen corresponding path program 101 times [2021-06-05 03:53:08,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:08,228 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100063015] [2021-06-05 03:53:08,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:08,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:08,336 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 125 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:53:08,336 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:08,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100063015] [2021-06-05 03:53:08,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100063015] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:08,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737351399] [2021-06-05 03:53:08,337 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:08,370 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-05 03:53:08,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:08,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 03:53:08,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:08,440 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 125 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:53:08,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737351399] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:08,441 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:08,441 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 03:53:08,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210789172] [2021-06-05 03:53:08,441 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 03:53:08,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:08,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 03:53:08,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:53:08,441 INFO L87 Difference]: Start difference. First operand 10698 states and 27656 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:09,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:09,009 INFO L93 Difference]: Finished difference Result 14809 states and 36436 transitions. [2021-06-05 03:53:09,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 03:53:09,009 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 03:53:09,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:09,025 INFO L225 Difference]: With dead ends: 14809 [2021-06-05 03:53:09,025 INFO L226 Difference]: Without dead ends: 14757 [2021-06-05 03:53:09,026 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 259.3ms TimeCoverageRelationStatistics Valid=138, Invalid=732, Unknown=0, NotChecked=0, Total=870 [2021-06-05 03:53:09,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14757 states. [2021-06-05 03:53:09,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14757 to 10607. [2021-06-05 03:53:09,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10607 states, 10606 states have (on average 2.587309070337545) internal successors, (27441), 10606 states have internal predecessors, (27441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:09,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10607 states to 10607 states and 27441 transitions. [2021-06-05 03:53:09,169 INFO L78 Accepts]: Start accepts. Automaton has 10607 states and 27441 transitions. Word has length 53 [2021-06-05 03:53:09,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:09,170 INFO L482 AbstractCegarLoop]: Abstraction has 10607 states and 27441 transitions. [2021-06-05 03:53:09,170 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:09,170 INFO L276 IsEmpty]: Start isEmpty. Operand 10607 states and 27441 transitions. [2021-06-05 03:53:09,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 03:53:09,176 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:09,176 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:09,376 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 363 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable751 [2021-06-05 03:53:09,376 INFO L430 AbstractCegarLoop]: === Iteration 372 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:09,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:09,377 INFO L82 PathProgramCache]: Analyzing trace with hash 1617639658, now seen corresponding path program 212 times [2021-06-05 03:53:09,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:09,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200453808] [2021-06-05 03:53:09,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:09,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:09,495 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 16 proven. 116 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:53:09,495 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:09,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200453808] [2021-06-05 03:53:09,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200453808] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:09,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977952195] [2021-06-05 03:53:09,495 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:09,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:53:09,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:09,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 03:53:09,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:09,701 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 13 proven. 119 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:53:09,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977952195] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:09,701 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:09,701 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2021-06-05 03:53:09,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770729406] [2021-06-05 03:53:09,701 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:53:09,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:09,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:53:09,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:53:09,702 INFO L87 Difference]: Start difference. First operand 10607 states and 27441 transitions. Second operand has 19 states, 19 states have (on average 3.6315789473684212) internal successors, (69), 18 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:10,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:10,360 INFO L93 Difference]: Finished difference Result 10731 states and 27633 transitions. [2021-06-05 03:53:10,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 03:53:10,361 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.6315789473684212) internal successors, (69), 18 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 03:53:10,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:10,370 INFO L225 Difference]: With dead ends: 10731 [2021-06-05 03:53:10,370 INFO L226 Difference]: Without dead ends: 10675 [2021-06-05 03:53:10,370 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 196.3ms TimeCoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-06-05 03:53:10,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10675 states. [2021-06-05 03:53:10,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10675 to 10607. [2021-06-05 03:53:10,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10607 states, 10606 states have (on average 2.5841976239864226) internal successors, (27408), 10606 states have internal predecessors, (27408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:10,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10607 states to 10607 states and 27408 transitions. [2021-06-05 03:53:10,487 INFO L78 Accepts]: Start accepts. Automaton has 10607 states and 27408 transitions. Word has length 53 [2021-06-05 03:53:10,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:10,487 INFO L482 AbstractCegarLoop]: Abstraction has 10607 states and 27408 transitions. [2021-06-05 03:53:10,487 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.6315789473684212) internal successors, (69), 18 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:10,487 INFO L276 IsEmpty]: Start isEmpty. Operand 10607 states and 27408 transitions. [2021-06-05 03:53:10,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 03:53:10,493 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:10,493 INFO L521 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:10,693 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 364 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable752 [2021-06-05 03:53:10,693 INFO L430 AbstractCegarLoop]: === Iteration 373 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:10,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:10,694 INFO L82 PathProgramCache]: Analyzing trace with hash -290292687, now seen corresponding path program 102 times [2021-06-05 03:53:10,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:10,694 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158232525] [2021-06-05 03:53:10,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:10,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:10,772 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 42 proven. 91 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:53:10,772 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:10,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158232525] [2021-06-05 03:53:10,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158232525] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:10,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432511498] [2021-06-05 03:53:10,772 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:10,799 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 03:53:10,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:10,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 03:53:10,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:10,889 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 43 proven. 91 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:53:10,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432511498] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:10,890 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:10,890 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 16 [2021-06-05 03:53:10,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834991381] [2021-06-05 03:53:10,890 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 03:53:10,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:10,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 03:53:10,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:53:10,890 INFO L87 Difference]: Start difference. First operand 10607 states and 27408 transitions. Second operand has 17 states, 17 states have (on average 3.9411764705882355) internal successors, (67), 16 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:11,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:11,150 INFO L93 Difference]: Finished difference Result 12680 states and 31642 transitions. [2021-06-05 03:53:11,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 03:53:11,150 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.9411764705882355) internal successors, (67), 16 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 03:53:11,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:11,163 INFO L225 Difference]: With dead ends: 12680 [2021-06-05 03:53:11,163 INFO L226 Difference]: Without dead ends: 12630 [2021-06-05 03:53:11,163 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 126.9ms TimeCoverageRelationStatistics Valid=129, Invalid=333, Unknown=0, NotChecked=0, Total=462 [2021-06-05 03:53:11,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12630 states. [2021-06-05 03:53:11,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12630 to 10144. [2021-06-05 03:53:11,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10144 states, 10143 states have (on average 2.5837523415163166) internal successors, (26207), 10143 states have internal predecessors, (26207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:11,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10144 states to 10144 states and 26207 transitions. [2021-06-05 03:53:11,286 INFO L78 Accepts]: Start accepts. Automaton has 10144 states and 26207 transitions. Word has length 53 [2021-06-05 03:53:11,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:11,286 INFO L482 AbstractCegarLoop]: Abstraction has 10144 states and 26207 transitions. [2021-06-05 03:53:11,286 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.9411764705882355) internal successors, (67), 16 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:11,286 INFO L276 IsEmpty]: Start isEmpty. Operand 10144 states and 26207 transitions. [2021-06-05 03:53:11,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 03:53:11,292 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:11,292 INFO L521 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:11,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable753,365 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:11,492 INFO L430 AbstractCegarLoop]: === Iteration 374 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:11,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:11,492 INFO L82 PathProgramCache]: Analyzing trace with hash 1595716629, now seen corresponding path program 213 times [2021-06-05 03:53:11,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:11,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830272653] [2021-06-05 03:53:11,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:11,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:11,574 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 64 proven. 70 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:53:11,574 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:11,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830272653] [2021-06-05 03:53:11,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830272653] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:11,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863959261] [2021-06-05 03:53:11,574 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:11,603 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-05 03:53:11,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:11,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 03:53:11,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:11,677 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 64 proven. 70 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:53:11,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863959261] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:11,677 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:11,677 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-06-05 03:53:11,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426377079] [2021-06-05 03:53:11,677 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:53:11,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:11,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:53:11,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:53:11,678 INFO L87 Difference]: Start difference. First operand 10144 states and 26207 transitions. Second operand has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:11,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:11,930 INFO L93 Difference]: Finished difference Result 12591 states and 31328 transitions. [2021-06-05 03:53:11,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 03:53:11,930 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 03:53:11,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:11,942 INFO L225 Difference]: With dead ends: 12591 [2021-06-05 03:53:11,942 INFO L226 Difference]: Without dead ends: 12591 [2021-06-05 03:53:11,942 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 127.3ms TimeCoverageRelationStatistics Valid=157, Invalid=263, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:53:11,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12591 states. [2021-06-05 03:53:12,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12591 to 10616. [2021-06-05 03:53:12,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10616 states, 10615 states have (on average 2.6016015073009893) internal successors, (27616), 10615 states have internal predecessors, (27616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:12,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10616 states to 10616 states and 27616 transitions. [2021-06-05 03:53:12,070 INFO L78 Accepts]: Start accepts. Automaton has 10616 states and 27616 transitions. Word has length 53 [2021-06-05 03:53:12,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:12,070 INFO L482 AbstractCegarLoop]: Abstraction has 10616 states and 27616 transitions. [2021-06-05 03:53:12,070 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:12,070 INFO L276 IsEmpty]: Start isEmpty. Operand 10616 states and 27616 transitions. [2021-06-05 03:53:12,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 03:53:12,076 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:12,076 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:12,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 366 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable759 [2021-06-05 03:53:12,276 INFO L430 AbstractCegarLoop]: === Iteration 375 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:12,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:12,276 INFO L82 PathProgramCache]: Analyzing trace with hash -2006879870, now seen corresponding path program 103 times [2021-06-05 03:53:12,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:12,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888980261] [2021-06-05 03:53:12,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:12,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:12,367 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 125 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:53:12,368 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:12,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888980261] [2021-06-05 03:53:12,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888980261] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:12,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823403260] [2021-06-05 03:53:12,368 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:12,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:12,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 03:53:12,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:12,464 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 125 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:53:12,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823403260] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:12,464 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:12,464 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 03:53:12,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375151738] [2021-06-05 03:53:12,464 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:53:12,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:12,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:53:12,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:53:12,464 INFO L87 Difference]: Start difference. First operand 10616 states and 27616 transitions. Second operand has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:12,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:12,953 INFO L93 Difference]: Finished difference Result 13894 states and 34616 transitions. [2021-06-05 03:53:12,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 03:53:12,953 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 03:53:12,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:12,966 INFO L225 Difference]: With dead ends: 13894 [2021-06-05 03:53:12,966 INFO L226 Difference]: Without dead ends: 13880 [2021-06-05 03:53:12,966 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 207.7ms TimeCoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2021-06-05 03:53:12,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13880 states. [2021-06-05 03:53:13,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13880 to 10564. [2021-06-05 03:53:13,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10564 states, 10563 states have (on average 2.6058884786518983) internal successors, (27526), 10563 states have internal predecessors, (27526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:13,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10564 states to 10564 states and 27526 transitions. [2021-06-05 03:53:13,118 INFO L78 Accepts]: Start accepts. Automaton has 10564 states and 27526 transitions. Word has length 53 [2021-06-05 03:53:13,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:13,118 INFO L482 AbstractCegarLoop]: Abstraction has 10564 states and 27526 transitions. [2021-06-05 03:53:13,118 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:13,118 INFO L276 IsEmpty]: Start isEmpty. Operand 10564 states and 27526 transitions. [2021-06-05 03:53:13,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 03:53:13,124 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:13,124 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:13,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable760,367 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:13,325 INFO L430 AbstractCegarLoop]: === Iteration 376 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:13,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:13,325 INFO L82 PathProgramCache]: Analyzing trace with hash 2126035330, now seen corresponding path program 214 times [2021-06-05 03:53:13,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:13,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820455962] [2021-06-05 03:53:13,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:13,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:13,424 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 16 proven. 116 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:53:13,424 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:13,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820455962] [2021-06-05 03:53:13,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820455962] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:13,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667725534] [2021-06-05 03:53:13,424 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:13,450 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:53:13,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:13,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 03:53:13,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:13,598 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 13 proven. 119 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:53:13,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667725534] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:13,598 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:13,598 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 03:53:13,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357515010] [2021-06-05 03:53:13,598 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 03:53:13,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:13,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 03:53:13,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:53:13,599 INFO L87 Difference]: Start difference. First operand 10564 states and 27526 transitions. Second operand has 17 states, 17 states have (on average 3.8823529411764706) internal successors, (66), 16 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:14,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:14,118 INFO L93 Difference]: Finished difference Result 10719 states and 27762 transitions. [2021-06-05 03:53:14,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 03:53:14,119 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.8823529411764706) internal successors, (66), 16 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 03:53:14,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:14,129 INFO L225 Difference]: With dead ends: 10719 [2021-06-05 03:53:14,129 INFO L226 Difference]: Without dead ends: 10675 [2021-06-05 03:53:14,129 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 164.5ms TimeCoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:53:14,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10675 states. [2021-06-05 03:53:14,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10675 to 10564. [2021-06-05 03:53:14,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10564 states, 10563 states have (on average 2.6041844173056896) internal successors, (27508), 10563 states have internal predecessors, (27508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:14,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10564 states to 10564 states and 27508 transitions. [2021-06-05 03:53:14,246 INFO L78 Accepts]: Start accepts. Automaton has 10564 states and 27508 transitions. Word has length 53 [2021-06-05 03:53:14,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:14,246 INFO L482 AbstractCegarLoop]: Abstraction has 10564 states and 27508 transitions. [2021-06-05 03:53:14,246 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.8823529411764706) internal successors, (66), 16 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:14,246 INFO L276 IsEmpty]: Start isEmpty. Operand 10564 states and 27508 transitions. [2021-06-05 03:53:14,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 03:53:14,253 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:14,253 INFO L521 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:14,453 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 368 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable761 [2021-06-05 03:53:14,453 INFO L430 AbstractCegarLoop]: === Iteration 377 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:14,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:14,453 INFO L82 PathProgramCache]: Analyzing trace with hash 145337653, now seen corresponding path program 104 times [2021-06-05 03:53:14,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:14,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723598875] [2021-06-05 03:53:14,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:14,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:14,532 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 50 proven. 84 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:53:14,532 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:14,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723598875] [2021-06-05 03:53:14,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723598875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:14,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121936067] [2021-06-05 03:53:14,533 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:14,558 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:53:14,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:14,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 03:53:14,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:14,634 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 51 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:53:14,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121936067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:14,634 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:14,634 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 14 [2021-06-05 03:53:14,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537644260] [2021-06-05 03:53:14,635 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 03:53:14,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:14,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 03:53:14,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:53:14,635 INFO L87 Difference]: Start difference. First operand 10564 states and 27508 transitions. Second operand has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:14,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:14,876 INFO L93 Difference]: Finished difference Result 12086 states and 30576 transitions. [2021-06-05 03:53:14,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 03:53:14,876 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 03:53:14,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:14,887 INFO L225 Difference]: With dead ends: 12086 [2021-06-05 03:53:14,887 INFO L226 Difference]: Without dead ends: 12002 [2021-06-05 03:53:14,888 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 106.3ms TimeCoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:53:14,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12002 states. [2021-06-05 03:53:14,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12002 to 9748. [2021-06-05 03:53:14,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9748 states, 9747 states have (on average 2.6030573509797885) internal successors, (25372), 9747 states have internal predecessors, (25372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:15,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9748 states to 9748 states and 25372 transitions. [2021-06-05 03:53:15,008 INFO L78 Accepts]: Start accepts. Automaton has 9748 states and 25372 transitions. Word has length 53 [2021-06-05 03:53:15,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:15,008 INFO L482 AbstractCegarLoop]: Abstraction has 9748 states and 25372 transitions. [2021-06-05 03:53:15,008 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:15,008 INFO L276 IsEmpty]: Start isEmpty. Operand 9748 states and 25372 transitions. [2021-06-05 03:53:15,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 03:53:15,014 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:15,014 INFO L521 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:15,215 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable762,369 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:15,215 INFO L430 AbstractCegarLoop]: === Iteration 378 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:15,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:15,215 INFO L82 PathProgramCache]: Analyzing trace with hash 1808139831, now seen corresponding path program 215 times [2021-06-05 03:53:15,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:15,215 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373171433] [2021-06-05 03:53:15,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:15,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:15,286 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 62 proven. 72 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:53:15,286 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:15,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373171433] [2021-06-05 03:53:15,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373171433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:15,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867712870] [2021-06-05 03:53:15,286 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:15,314 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-05 03:53:15,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:15,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 03:53:15,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:15,400 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 64 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:15,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867712870] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:15,401 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:15,401 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 14 [2021-06-05 03:53:15,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640685628] [2021-06-05 03:53:15,401 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 03:53:15,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:15,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 03:53:15,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:53:15,401 INFO L87 Difference]: Start difference. First operand 9748 states and 25372 transitions. Second operand has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:15,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:15,639 INFO L93 Difference]: Finished difference Result 12328 states and 30680 transitions. [2021-06-05 03:53:15,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 03:53:15,639 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 03:53:15,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:15,651 INFO L225 Difference]: With dead ends: 12328 [2021-06-05 03:53:15,651 INFO L226 Difference]: Without dead ends: 12328 [2021-06-05 03:53:15,651 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 111.8ms TimeCoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2021-06-05 03:53:15,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12328 states. [2021-06-05 03:53:15,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12328 to 10133. [2021-06-05 03:53:15,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10133 states, 10132 states have (on average 2.618041847611528) internal successors, (26526), 10132 states have internal predecessors, (26526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:15,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10133 states to 10133 states and 26526 transitions. [2021-06-05 03:53:15,811 INFO L78 Accepts]: Start accepts. Automaton has 10133 states and 26526 transitions. Word has length 53 [2021-06-05 03:53:15,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:15,812 INFO L482 AbstractCegarLoop]: Abstraction has 10133 states and 26526 transitions. [2021-06-05 03:53:15,812 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:15,812 INFO L276 IsEmpty]: Start isEmpty. Operand 10133 states and 26526 transitions. [2021-06-05 03:53:15,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 03:53:15,817 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:15,817 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:16,018 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable768,370 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:16,018 INFO L430 AbstractCegarLoop]: === Iteration 379 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:16,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:16,018 INFO L82 PathProgramCache]: Analyzing trace with hash -933239766, now seen corresponding path program 105 times [2021-06-05 03:53:16,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:16,018 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657543629] [2021-06-05 03:53:16,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:16,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:16,100 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 125 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:53:16,100 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:16,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657543629] [2021-06-05 03:53:16,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657543629] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:16,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766528072] [2021-06-05 03:53:16,100 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:16,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-05 03:53:16,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:16,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 03:53:16,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:16,199 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 125 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:53:16,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766528072] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:16,199 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:16,199 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 03:53:16,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726238213] [2021-06-05 03:53:16,199 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 03:53:16,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:16,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 03:53:16,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:53:16,200 INFO L87 Difference]: Start difference. First operand 10133 states and 26526 transitions. Second operand has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:16,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:16,686 INFO L93 Difference]: Finished difference Result 12314 states and 31139 transitions. [2021-06-05 03:53:16,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 03:53:16,687 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 03:53:16,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:16,699 INFO L225 Difference]: With dead ends: 12314 [2021-06-05 03:53:16,699 INFO L226 Difference]: Without dead ends: 12300 [2021-06-05 03:53:16,699 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 170.6ms TimeCoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-06-05 03:53:16,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12300 states. [2021-06-05 03:53:16,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12300 to 10160. [2021-06-05 03:53:16,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10160 states, 10159 states have (on average 2.6188601240279556) internal successors, (26605), 10159 states have internal predecessors, (26605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:16,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10160 states to 10160 states and 26605 transitions. [2021-06-05 03:53:16,825 INFO L78 Accepts]: Start accepts. Automaton has 10160 states and 26605 transitions. Word has length 53 [2021-06-05 03:53:16,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:16,825 INFO L482 AbstractCegarLoop]: Abstraction has 10160 states and 26605 transitions. [2021-06-05 03:53:16,826 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:16,826 INFO L276 IsEmpty]: Start isEmpty. Operand 10160 states and 26605 transitions. [2021-06-05 03:53:16,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 03:53:16,832 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:16,832 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:17,032 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 371 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable769 [2021-06-05 03:53:17,032 INFO L430 AbstractCegarLoop]: === Iteration 380 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:17,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:17,032 INFO L82 PathProgramCache]: Analyzing trace with hash -1110130710, now seen corresponding path program 216 times [2021-06-05 03:53:17,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:17,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64234001] [2021-06-05 03:53:17,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:17,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:17,120 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 16 proven. 116 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:53:17,120 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:17,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64234001] [2021-06-05 03:53:17,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64234001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:17,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406338398] [2021-06-05 03:53:17,121 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:17,149 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-05 03:53:17,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:17,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 03:53:17,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:17,274 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 13 proven. 119 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:53:17,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406338398] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:17,274 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:17,274 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-05 03:53:17,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116228257] [2021-06-05 03:53:17,274 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 03:53:17,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:17,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 03:53:17,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:53:17,275 INFO L87 Difference]: Start difference. First operand 10160 states and 26605 transitions. Second operand has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:17,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:17,675 INFO L93 Difference]: Finished difference Result 10211 states and 26683 transitions. [2021-06-05 03:53:17,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 03:53:17,675 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 03:53:17,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:17,685 INFO L225 Difference]: With dead ends: 10211 [2021-06-05 03:53:17,685 INFO L226 Difference]: Without dead ends: 10179 [2021-06-05 03:53:17,686 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 113.8ms TimeCoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:53:17,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10179 states. [2021-06-05 03:53:17,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10179 to 10160. [2021-06-05 03:53:17,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10160 states, 10159 states have (on average 2.6182695147160153) internal successors, (26599), 10159 states have internal predecessors, (26599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:17,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10160 states to 10160 states and 26599 transitions. [2021-06-05 03:53:17,799 INFO L78 Accepts]: Start accepts. Automaton has 10160 states and 26599 transitions. Word has length 53 [2021-06-05 03:53:17,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:17,799 INFO L482 AbstractCegarLoop]: Abstraction has 10160 states and 26599 transitions. [2021-06-05 03:53:17,800 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:17,800 INFO L276 IsEmpty]: Start isEmpty. Operand 10160 states and 26599 transitions. [2021-06-05 03:53:17,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 03:53:17,806 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:17,806 INFO L521 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:18,006 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable770,372 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:18,007 INFO L430 AbstractCegarLoop]: === Iteration 381 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:18,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:18,007 INFO L82 PathProgramCache]: Analyzing trace with hash -1855932587, now seen corresponding path program 217 times [2021-06-05 03:53:18,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:18,007 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147573676] [2021-06-05 03:53:18,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:18,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:18,070 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 60 proven. 74 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:53:18,070 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:18,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147573676] [2021-06-05 03:53:18,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147573676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:18,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611153949] [2021-06-05 03:53:18,071 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:18,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:18,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 03:53:18,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:18,186 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 95 proven. 39 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:53:18,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611153949] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:18,186 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:18,186 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-06-05 03:53:18,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779954148] [2021-06-05 03:53:18,186 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:53:18,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:18,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:53:18,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=109, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:53:18,186 INFO L87 Difference]: Start difference. First operand 10160 states and 26599 transitions. Second operand has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 13 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:18,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:18,385 INFO L93 Difference]: Finished difference Result 12704 states and 31833 transitions. [2021-06-05 03:53:18,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 03:53:18,386 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 13 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 03:53:18,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:18,400 INFO L225 Difference]: With dead ends: 12704 [2021-06-05 03:53:18,400 INFO L226 Difference]: Without dead ends: 12704 [2021-06-05 03:53:18,400 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 91.5ms TimeCoverageRelationStatistics Valid=113, Invalid=159, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:53:18,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12704 states. [2021-06-05 03:53:18,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12704 to 10580. [2021-06-05 03:53:18,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10580 states, 10579 states have (on average 2.632668494186596) internal successors, (27851), 10579 states have internal predecessors, (27851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:18,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10580 states to 10580 states and 27851 transitions. [2021-06-05 03:53:18,542 INFO L78 Accepts]: Start accepts. Automaton has 10580 states and 27851 transitions. Word has length 53 [2021-06-05 03:53:18,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:18,542 INFO L482 AbstractCegarLoop]: Abstraction has 10580 states and 27851 transitions. [2021-06-05 03:53:18,542 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 13 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:18,542 INFO L276 IsEmpty]: Start isEmpty. Operand 10580 states and 27851 transitions. [2021-06-05 03:53:18,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 03:53:18,548 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:18,548 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:18,748 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 373 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable771 [2021-06-05 03:53:18,749 INFO L430 AbstractCegarLoop]: === Iteration 382 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:18,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:18,749 INFO L82 PathProgramCache]: Analyzing trace with hash 1668199042, now seen corresponding path program 106 times [2021-06-05 03:53:18,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:18,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9255694] [2021-06-05 03:53:18,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:18,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:18,823 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 125 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:53:18,823 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:18,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9255694] [2021-06-05 03:53:18,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9255694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:18,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793710036] [2021-06-05 03:53:18,823 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:18,854 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:53:18,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:18,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 03:53:18,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:18,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 03:53:18,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2021-06-05 03:53:18,994 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 03:53:18,996 INFO L628 ElimStorePlain]: treesize reduction 20, result has 4.8 percent of original size [2021-06-05 03:53:18,996 INFO L518 ElimStorePlain]: Eliminatee B vanished before elimination [2021-06-05 03:53:18,996 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 03:53:18,997 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:1 [2021-06-05 03:53:19,001 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 125 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:53:19,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793710036] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:19,001 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:19,002 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-06-05 03:53:19,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528488159] [2021-06-05 03:53:19,002 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:53:19,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:19,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:53:19,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:53:19,002 INFO L87 Difference]: Start difference. First operand 10580 states and 27851 transitions. Second operand has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:19,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:19,535 INFO L93 Difference]: Finished difference Result 13655 states and 34305 transitions. [2021-06-05 03:53:19,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 03:53:19,535 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 03:53:19,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:19,550 INFO L225 Difference]: With dead ends: 13655 [2021-06-05 03:53:19,550 INFO L226 Difference]: Without dead ends: 13599 [2021-06-05 03:53:19,550 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 155.9ms TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-06-05 03:53:19,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13599 states. [2021-06-05 03:53:19,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13599 to 11353. [2021-06-05 03:53:19,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11353 states, 11352 states have (on average 2.6204193093727977) internal successors, (29747), 11352 states have internal predecessors, (29747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:19,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11353 states to 11353 states and 29747 transitions. [2021-06-05 03:53:19,701 INFO L78 Accepts]: Start accepts. Automaton has 11353 states and 29747 transitions. Word has length 53 [2021-06-05 03:53:19,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:19,701 INFO L482 AbstractCegarLoop]: Abstraction has 11353 states and 29747 transitions. [2021-06-05 03:53:19,701 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:19,701 INFO L276 IsEmpty]: Start isEmpty. Operand 11353 states and 29747 transitions. [2021-06-05 03:53:19,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 03:53:19,708 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:19,708 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:19,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 374 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable774 [2021-06-05 03:53:19,924 INFO L430 AbstractCegarLoop]: === Iteration 383 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:19,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:19,924 INFO L82 PathProgramCache]: Analyzing trace with hash 34902658, now seen corresponding path program 218 times [2021-06-05 03:53:19,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:19,924 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969683965] [2021-06-05 03:53:19,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:19,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:20,003 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 16 proven. 116 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:53:20,003 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:20,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969683965] [2021-06-05 03:53:20,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969683965] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:20,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015388207] [2021-06-05 03:53:20,003 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:20,030 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:53:20,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:20,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 03:53:20,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:20,130 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 13 proven. 119 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:53:20,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015388207] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:20,130 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:20,130 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-06-05 03:53:20,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166025544] [2021-06-05 03:53:20,131 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 03:53:20,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:20,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 03:53:20,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:53:20,131 INFO L87 Difference]: Start difference. First operand 11353 states and 29747 transitions. Second operand has 13 states, 13 states have (on average 4.615384615384615) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:20,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:20,431 INFO L93 Difference]: Finished difference Result 11423 states and 29849 transitions. [2021-06-05 03:53:20,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 03:53:20,431 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.615384615384615) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 03:53:20,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:20,442 INFO L225 Difference]: With dead ends: 11423 [2021-06-05 03:53:20,443 INFO L226 Difference]: Without dead ends: 11403 [2021-06-05 03:53:20,443 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 97.9ms TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:53:20,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11403 states. [2021-06-05 03:53:20,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11403 to 11353. [2021-06-05 03:53:20,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11353 states, 11352 states have (on average 2.62015503875969) internal successors, (29744), 11352 states have internal predecessors, (29744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:20,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11353 states to 11353 states and 29744 transitions. [2021-06-05 03:53:20,576 INFO L78 Accepts]: Start accepts. Automaton has 11353 states and 29744 transitions. Word has length 53 [2021-06-05 03:53:20,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:20,576 INFO L482 AbstractCegarLoop]: Abstraction has 11353 states and 29744 transitions. [2021-06-05 03:53:20,576 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.615384615384615) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:20,576 INFO L276 IsEmpty]: Start isEmpty. Operand 11353 states and 29744 transitions. [2021-06-05 03:53:20,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 03:53:20,583 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:20,583 INFO L521 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:20,783 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable775,375 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:20,783 INFO L430 AbstractCegarLoop]: === Iteration 384 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:20,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:20,787 INFO L82 PathProgramCache]: Analyzing trace with hash 1588490357, now seen corresponding path program 107 times [2021-06-05 03:53:20,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:20,787 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412161600] [2021-06-05 03:53:20,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:20,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:20,857 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 58 proven. 76 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:53:20,857 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:20,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412161600] [2021-06-05 03:53:20,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412161600] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:20,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970402416] [2021-06-05 03:53:20,858 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:20,885 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 03:53:20,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:20,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 03:53:20,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:20,999 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 60 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:20,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970402416] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:20,999 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:20,999 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 16] total 19 [2021-06-05 03:53:20,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387328264] [2021-06-05 03:53:20,999 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 03:53:21,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:21,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 03:53:21,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2021-06-05 03:53:21,000 INFO L87 Difference]: Start difference. First operand 11353 states and 29744 transitions. Second operand has 20 states, 20 states have (on average 4.0) internal successors, (80), 19 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:21,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:21,277 INFO L93 Difference]: Finished difference Result 12639 states and 32192 transitions. [2021-06-05 03:53:21,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 03:53:21,278 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.0) internal successors, (80), 19 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 03:53:21,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:21,291 INFO L225 Difference]: With dead ends: 12639 [2021-06-05 03:53:21,291 INFO L226 Difference]: Without dead ends: 12617 [2021-06-05 03:53:21,291 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 124.9ms TimeCoverageRelationStatistics Valid=127, Invalid=379, Unknown=0, NotChecked=0, Total=506 [2021-06-05 03:53:21,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12617 states. [2021-06-05 03:53:21,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12617 to 11299. [2021-06-05 03:53:21,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11299 states, 11298 states have (on average 2.6222340237210124) internal successors, (29626), 11298 states have internal predecessors, (29626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:21,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11299 states to 11299 states and 29626 transitions. [2021-06-05 03:53:21,433 INFO L78 Accepts]: Start accepts. Automaton has 11299 states and 29626 transitions. Word has length 53 [2021-06-05 03:53:21,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:21,433 INFO L482 AbstractCegarLoop]: Abstraction has 11299 states and 29626 transitions. [2021-06-05 03:53:21,433 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 4.0) internal successors, (80), 19 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:21,433 INFO L276 IsEmpty]: Start isEmpty. Operand 11299 states and 29626 transitions. [2021-06-05 03:53:21,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 03:53:21,440 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:21,440 INFO L521 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:21,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 376 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable776 [2021-06-05 03:53:21,640 INFO L430 AbstractCegarLoop]: === Iteration 385 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:21,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:21,641 INFO L82 PathProgramCache]: Analyzing trace with hash 1668467447, now seen corresponding path program 219 times [2021-06-05 03:53:21,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:21,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808910584] [2021-06-05 03:53:21,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:21,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:21,701 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 58 proven. 76 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:53:21,701 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:21,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808910584] [2021-06-05 03:53:21,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808910584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:21,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462707292] [2021-06-05 03:53:21,701 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:21,736 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-05 03:53:21,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:21,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 03:53:21,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:21,852 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 58 proven. 76 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:53:21,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462707292] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:21,853 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:21,853 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 03:53:21,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948755911] [2021-06-05 03:53:21,853 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 03:53:21,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:21,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 03:53:21,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-06-05 03:53:21,854 INFO L87 Difference]: Start difference. First operand 11299 states and 29626 transitions. Second operand has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:22,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:22,004 INFO L93 Difference]: Finished difference Result 14216 states and 35571 transitions. [2021-06-05 03:53:22,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 03:53:22,004 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 03:53:22,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:22,019 INFO L225 Difference]: With dead ends: 14216 [2021-06-05 03:53:22,019 INFO L226 Difference]: Without dead ends: 14216 [2021-06-05 03:53:22,019 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 56.8ms TimeCoverageRelationStatistics Valid=58, Invalid=74, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:53:22,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14216 states. [2021-06-05 03:53:22,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14216 to 11759. [2021-06-05 03:53:22,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11759 states, 11758 states have (on average 2.634886885524749) internal successors, (30981), 11758 states have internal predecessors, (30981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:22,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11759 states to 11759 states and 30981 transitions. [2021-06-05 03:53:22,178 INFO L78 Accepts]: Start accepts. Automaton has 11759 states and 30981 transitions. Word has length 53 [2021-06-05 03:53:22,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:22,178 INFO L482 AbstractCegarLoop]: Abstraction has 11759 states and 30981 transitions. [2021-06-05 03:53:22,178 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:22,178 INFO L276 IsEmpty]: Start isEmpty. Operand 11759 states and 30981 transitions. [2021-06-05 03:53:22,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 03:53:22,186 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:22,186 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:22,386 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable779,377 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:22,386 INFO L430 AbstractCegarLoop]: === Iteration 386 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:22,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:22,386 INFO L82 PathProgramCache]: Analyzing trace with hash 1430405930, now seen corresponding path program 108 times [2021-06-05 03:53:22,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:22,386 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293017754] [2021-06-05 03:53:22,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:22,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:22,469 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 125 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:53:22,469 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:22,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293017754] [2021-06-05 03:53:22,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293017754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:22,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677188503] [2021-06-05 03:53:22,469 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:22,498 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-05 03:53:22,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:22,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 03:53:22,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:22,569 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 125 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:53:22,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677188503] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:22,570 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:22,570 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 03:53:22,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279342953] [2021-06-05 03:53:22,570 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 03:53:22,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:22,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 03:53:22,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-05 03:53:22,570 INFO L87 Difference]: Start difference. First operand 11759 states and 30981 transitions. Second operand has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 10 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:23,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:23,015 INFO L93 Difference]: Finished difference Result 12771 states and 32920 transitions. [2021-06-05 03:53:23,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 03:53:23,015 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 10 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 03:53:23,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:23,028 INFO L225 Difference]: With dead ends: 12771 [2021-06-05 03:53:23,028 INFO L226 Difference]: Without dead ends: 12763 [2021-06-05 03:53:23,029 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 123.7ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:53:23,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12763 states. [2021-06-05 03:53:23,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12763 to 11651. [2021-06-05 03:53:23,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11651 states, 11650 states have (on average 2.6366523605150216) internal successors, (30717), 11650 states have internal predecessors, (30717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:23,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11651 states to 11651 states and 30717 transitions. [2021-06-05 03:53:23,178 INFO L78 Accepts]: Start accepts. Automaton has 11651 states and 30717 transitions. Word has length 53 [2021-06-05 03:53:23,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:23,179 INFO L482 AbstractCegarLoop]: Abstraction has 11651 states and 30717 transitions. [2021-06-05 03:53:23,179 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 10 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:23,179 INFO L276 IsEmpty]: Start isEmpty. Operand 11651 states and 30717 transitions. [2021-06-05 03:53:23,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 03:53:23,185 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:23,186 INFO L521 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:23,386 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable780,378 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:23,386 INFO L430 AbstractCegarLoop]: === Iteration 387 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:23,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:23,386 INFO L82 PathProgramCache]: Analyzing trace with hash -123290927, now seen corresponding path program 220 times [2021-06-05 03:53:23,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:23,386 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371472681] [2021-06-05 03:53:23,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:23,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:23,444 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 72 proven. 62 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:53:23,444 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:23,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371472681] [2021-06-05 03:53:23,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371472681] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:23,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156970219] [2021-06-05 03:53:23,445 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:23,470 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:53:23,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:23,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 03:53:23,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:23,538 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 72 proven. 62 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:53:23,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156970219] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:23,538 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:23,538 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 03:53:23,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062127316] [2021-06-05 03:53:23,538 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 03:53:23,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:23,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 03:53:23,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-06-05 03:53:23,539 INFO L87 Difference]: Start difference. First operand 11651 states and 30717 transitions. Second operand has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:23,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:23,675 INFO L93 Difference]: Finished difference Result 13925 states and 34879 transitions. [2021-06-05 03:53:23,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 03:53:23,675 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 03:53:23,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:23,688 INFO L225 Difference]: With dead ends: 13925 [2021-06-05 03:53:23,688 INFO L226 Difference]: Without dead ends: 13922 [2021-06-05 03:53:23,688 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 51.5ms TimeCoverageRelationStatistics Valid=58, Invalid=74, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:53:23,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13922 states. [2021-06-05 03:53:23,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13922 to 11650. [2021-06-05 03:53:23,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11650 states, 11649 states have (on average 2.6362777920851577) internal successors, (30710), 11649 states have internal predecessors, (30710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:23,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11650 states to 11650 states and 30710 transitions. [2021-06-05 03:53:23,835 INFO L78 Accepts]: Start accepts. Automaton has 11650 states and 30710 transitions. Word has length 53 [2021-06-05 03:53:23,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:23,835 INFO L482 AbstractCegarLoop]: Abstraction has 11650 states and 30710 transitions. [2021-06-05 03:53:23,836 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:23,836 INFO L276 IsEmpty]: Start isEmpty. Operand 11650 states and 30710 transitions. [2021-06-05 03:53:23,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 03:53:23,842 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:23,842 INFO L521 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:24,043 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable781,379 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:24,043 INFO L430 AbstractCegarLoop]: === Iteration 388 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:24,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:24,043 INFO L82 PathProgramCache]: Analyzing trace with hash 83771639, now seen corresponding path program 221 times [2021-06-05 03:53:24,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:24,043 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033927981] [2021-06-05 03:53:24,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:24,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:24,101 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 65 proven. 68 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:53:24,101 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:24,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033927981] [2021-06-05 03:53:24,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033927981] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:24,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940810017] [2021-06-05 03:53:24,102 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:24,129 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-05 03:53:24,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:24,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 03:53:24,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:24,218 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 68 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:24,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940810017] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:24,218 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:24,219 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 13 [2021-06-05 03:53:24,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497650262] [2021-06-05 03:53:24,219 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:53:24,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:24,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:53:24,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:53:24,219 INFO L87 Difference]: Start difference. First operand 11650 states and 30710 transitions. Second operand has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:24,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:24,391 INFO L93 Difference]: Finished difference Result 14037 states and 35373 transitions. [2021-06-05 03:53:24,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 03:53:24,391 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 03:53:24,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:24,405 INFO L225 Difference]: With dead ends: 14037 [2021-06-05 03:53:24,405 INFO L226 Difference]: Without dead ends: 14025 [2021-06-05 03:53:24,405 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 80.0ms TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:53:24,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14025 states. [2021-06-05 03:53:24,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14025 to 11650. [2021-06-05 03:53:24,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11650 states, 11649 states have (on average 2.636020259249721) internal successors, (30707), 11649 states have internal predecessors, (30707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:24,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11650 states to 11650 states and 30707 transitions. [2021-06-05 03:53:24,572 INFO L78 Accepts]: Start accepts. Automaton has 11650 states and 30707 transitions. Word has length 53 [2021-06-05 03:53:24,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:24,572 INFO L482 AbstractCegarLoop]: Abstraction has 11650 states and 30707 transitions. [2021-06-05 03:53:24,572 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:24,572 INFO L276 IsEmpty]: Start isEmpty. Operand 11650 states and 30707 transitions. [2021-06-05 03:53:24,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 03:53:24,579 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:24,579 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:24,779 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 380 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable783 [2021-06-05 03:53:24,780 INFO L430 AbstractCegarLoop]: === Iteration 389 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:24,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:24,780 INFO L82 PathProgramCache]: Analyzing trace with hash -1364228374, now seen corresponding path program 222 times [2021-06-05 03:53:24,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:24,780 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779489487] [2021-06-05 03:53:24,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:24,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:24,850 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 17 proven. 115 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:53:24,850 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:24,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779489487] [2021-06-05 03:53:24,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779489487] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:24,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309363150] [2021-06-05 03:53:24,850 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:24,879 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-05 03:53:24,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:24,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 03:53:24,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:24,960 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 13 proven. 119 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:53:24,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309363150] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:24,960 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:24,960 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 03:53:24,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660774570] [2021-06-05 03:53:24,961 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 03:53:24,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:24,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 03:53:24,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-05 03:53:24,961 INFO L87 Difference]: Start difference. First operand 11650 states and 30707 transitions. Second operand has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:25,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:25,451 INFO L93 Difference]: Finished difference Result 12517 states and 32320 transitions. [2021-06-05 03:53:25,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 03:53:25,451 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 03:53:25,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:25,463 INFO L225 Difference]: With dead ends: 12517 [2021-06-05 03:53:25,464 INFO L226 Difference]: Without dead ends: 12384 [2021-06-05 03:53:25,464 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 114.1ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:53:25,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12384 states. [2021-06-05 03:53:25,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12384 to 11825. [2021-06-05 03:53:25,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11825 states, 11824 states have (on average 2.6268606224627877) internal successors, (31060), 11824 states have internal predecessors, (31060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:25,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11825 states to 11825 states and 31060 transitions. [2021-06-05 03:53:25,610 INFO L78 Accepts]: Start accepts. Automaton has 11825 states and 31060 transitions. Word has length 53 [2021-06-05 03:53:25,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:25,610 INFO L482 AbstractCegarLoop]: Abstraction has 11825 states and 31060 transitions. [2021-06-05 03:53:25,610 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:25,610 INFO L276 IsEmpty]: Start isEmpty. Operand 11825 states and 31060 transitions. [2021-06-05 03:53:25,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 03:53:25,617 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:25,617 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:25,817 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 381 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable786 [2021-06-05 03:53:25,817 INFO L430 AbstractCegarLoop]: === Iteration 390 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:25,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:25,818 INFO L82 PathProgramCache]: Analyzing trace with hash -1977764554, now seen corresponding path program 223 times [2021-06-05 03:53:25,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:25,818 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875986637] [2021-06-05 03:53:25,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:25,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:25,891 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 116 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:53:25,891 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:25,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875986637] [2021-06-05 03:53:25,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875986637] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:25,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304046317] [2021-06-05 03:53:25,892 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 382 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 382 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:25,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:25,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 03:53:25,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:25,987 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 117 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:53:25,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304046317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:25,987 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:25,987 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 03:53:25,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222727185] [2021-06-05 03:53:25,987 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 03:53:25,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:25,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 03:53:25,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-05 03:53:25,987 INFO L87 Difference]: Start difference. First operand 11825 states and 31060 transitions. Second operand has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:26,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:26,326 INFO L93 Difference]: Finished difference Result 12581 states and 32513 transitions. [2021-06-05 03:53:26,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 03:53:26,327 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 03:53:26,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:26,339 INFO L225 Difference]: With dead ends: 12581 [2021-06-05 03:53:26,339 INFO L226 Difference]: Without dead ends: 12569 [2021-06-05 03:53:26,339 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 113.8ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:53:26,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12569 states. [2021-06-05 03:53:26,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12569 to 11827. [2021-06-05 03:53:26,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11827 states, 11826 states have (on average 2.6267546084897684) internal successors, (31064), 11826 states have internal predecessors, (31064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:26,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11827 states to 11827 states and 31064 transitions. [2021-06-05 03:53:26,477 INFO L78 Accepts]: Start accepts. Automaton has 11827 states and 31064 transitions. Word has length 53 [2021-06-05 03:53:26,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:26,477 INFO L482 AbstractCegarLoop]: Abstraction has 11827 states and 31064 transitions. [2021-06-05 03:53:26,477 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:26,477 INFO L276 IsEmpty]: Start isEmpty. Operand 11827 states and 31064 transitions. [2021-06-05 03:53:26,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 03:53:26,483 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:26,484 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:26,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable787,382 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:26,684 INFO L430 AbstractCegarLoop]: === Iteration 391 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:26,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:26,684 INFO L82 PathProgramCache]: Analyzing trace with hash 164152780, now seen corresponding path program 224 times [2021-06-05 03:53:26,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:26,684 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245442575] [2021-06-05 03:53:26,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:26,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:26,757 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 117 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:53:26,758 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:26,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245442575] [2021-06-05 03:53:26,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245442575] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:26,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664628126] [2021-06-05 03:53:26,758 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 383 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 383 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:26,786 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:53:26,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:26,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 03:53:26,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:26,857 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 118 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:53:26,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664628126] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:26,857 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:26,857 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 03:53:26,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199853244] [2021-06-05 03:53:26,857 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 03:53:26,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:26,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 03:53:26,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:53:26,858 INFO L87 Difference]: Start difference. First operand 11827 states and 31064 transitions. Second operand has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:27,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:27,482 INFO L93 Difference]: Finished difference Result 13836 states and 35142 transitions. [2021-06-05 03:53:27,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 03:53:27,482 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 03:53:27,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:27,495 INFO L225 Difference]: With dead ends: 13836 [2021-06-05 03:53:27,495 INFO L226 Difference]: Without dead ends: 13782 [2021-06-05 03:53:27,495 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 223.5ms TimeCoverageRelationStatistics Valid=123, Invalid=807, Unknown=0, NotChecked=0, Total=930 [2021-06-05 03:53:27,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13782 states. [2021-06-05 03:53:27,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13782 to 11958. [2021-06-05 03:53:27,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11958 states, 11957 states have (on average 2.6264113071840764) internal successors, (31404), 11957 states have internal predecessors, (31404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:27,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11958 states to 11958 states and 31404 transitions. [2021-06-05 03:53:27,647 INFO L78 Accepts]: Start accepts. Automaton has 11958 states and 31404 transitions. Word has length 53 [2021-06-05 03:53:27,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:27,647 INFO L482 AbstractCegarLoop]: Abstraction has 11958 states and 31404 transitions. [2021-06-05 03:53:27,647 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:27,647 INFO L276 IsEmpty]: Start isEmpty. Operand 11958 states and 31404 transitions. [2021-06-05 03:53:27,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 03:53:27,654 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:27,654 INFO L521 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:27,855 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 383 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable788 [2021-06-05 03:53:27,855 INFO L430 AbstractCegarLoop]: === Iteration 392 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:27,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:27,855 INFO L82 PathProgramCache]: Analyzing trace with hash 1696711889, now seen corresponding path program 225 times [2021-06-05 03:53:27,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:27,855 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070606826] [2021-06-05 03:53:27,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:27,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:27,922 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 51 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:53:27,922 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:27,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070606826] [2021-06-05 03:53:27,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070606826] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:27,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223848733] [2021-06-05 03:53:27,922 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 384 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 384 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:27,952 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-05 03:53:27,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:27,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 03:53:27,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:28,021 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 51 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:53:28,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223848733] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:28,021 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:28,022 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 03:53:28,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869865786] [2021-06-05 03:53:28,022 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 03:53:28,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:28,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 03:53:28,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:53:28,022 INFO L87 Difference]: Start difference. First operand 11958 states and 31404 transitions. Second operand has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:28,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:28,171 INFO L93 Difference]: Finished difference Result 14190 states and 35732 transitions. [2021-06-05 03:53:28,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 03:53:28,172 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 03:53:28,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:28,186 INFO L225 Difference]: With dead ends: 14190 [2021-06-05 03:53:28,186 INFO L226 Difference]: Without dead ends: 14172 [2021-06-05 03:53:28,186 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 69.6ms TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:53:28,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14172 states. [2021-06-05 03:53:28,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14172 to 12156. [2021-06-05 03:53:28,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12156 states, 12155 states have (on average 2.6338955162484576) internal successors, (32015), 12155 states have internal predecessors, (32015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:28,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12156 states to 12156 states and 32015 transitions. [2021-06-05 03:53:28,337 INFO L78 Accepts]: Start accepts. Automaton has 12156 states and 32015 transitions. Word has length 53 [2021-06-05 03:53:28,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:28,337 INFO L482 AbstractCegarLoop]: Abstraction has 12156 states and 32015 transitions. [2021-06-05 03:53:28,337 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:28,337 INFO L276 IsEmpty]: Start isEmpty. Operand 12156 states and 32015 transitions. [2021-06-05 03:53:28,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 03:53:28,344 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:28,344 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:28,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 384 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable789 [2021-06-05 03:53:28,544 INFO L430 AbstractCegarLoop]: === Iteration 393 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:28,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:28,544 INFO L82 PathProgramCache]: Analyzing trace with hash 318989314, now seen corresponding path program 226 times [2021-06-05 03:53:28,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:28,544 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439675924] [2021-06-05 03:53:28,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:28,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:28,626 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 117 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:53:28,626 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:28,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439675924] [2021-06-05 03:53:28,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439675924] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:28,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192745308] [2021-06-05 03:53:28,626 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 385 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 385 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:28,652 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:53:28,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:28,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 03:53:28,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:28,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 03:53:28,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2021-06-05 03:53:28,746 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 03:53:28,747 INFO L628 ElimStorePlain]: treesize reduction 20, result has 4.8 percent of original size [2021-06-05 03:53:28,748 INFO L518 ElimStorePlain]: Eliminatee B vanished before elimination [2021-06-05 03:53:28,748 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 03:53:28,748 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:1 [2021-06-05 03:53:28,754 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 18 proven. 114 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:53:28,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192745308] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:28,754 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:28,754 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 15 [2021-06-05 03:53:28,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051312821] [2021-06-05 03:53:28,754 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:53:28,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:28,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:53:28,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:53:28,754 INFO L87 Difference]: Start difference. First operand 12156 states and 32015 transitions. Second operand has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:29,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:29,743 INFO L93 Difference]: Finished difference Result 16988 states and 42019 transitions. [2021-06-05 03:53:29,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 03:53:29,743 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 03:53:29,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:29,760 INFO L225 Difference]: With dead ends: 16988 [2021-06-05 03:53:29,760 INFO L226 Difference]: Without dead ends: 16820 [2021-06-05 03:53:29,760 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 898 ImplicationChecksByTransitivity, 460.6ms TimeCoverageRelationStatistics Valid=321, Invalid=2649, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 03:53:29,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16820 states. [2021-06-05 03:53:29,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16820 to 12541. [2021-06-05 03:53:29,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12541 states, 12540 states have (on average 2.6271132376395534) internal successors, (32944), 12540 states have internal predecessors, (32944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:29,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12541 states to 12541 states and 32944 transitions. [2021-06-05 03:53:29,976 INFO L78 Accepts]: Start accepts. Automaton has 12541 states and 32944 transitions. Word has length 53 [2021-06-05 03:53:29,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:29,976 INFO L482 AbstractCegarLoop]: Abstraction has 12541 states and 32944 transitions. [2021-06-05 03:53:29,976 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:29,976 INFO L276 IsEmpty]: Start isEmpty. Operand 12541 states and 32944 transitions. [2021-06-05 03:53:29,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 03:53:29,983 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:29,983 INFO L521 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:30,183 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable793,385 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:30,184 INFO L430 AbstractCegarLoop]: === Iteration 394 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:30,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:30,184 INFO L82 PathProgramCache]: Analyzing trace with hash 705591991, now seen corresponding path program 227 times [2021-06-05 03:53:30,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:30,184 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025316586] [2021-06-05 03:53:30,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:30,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:30,260 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 43 proven. 92 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:53:30,260 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:30,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025316586] [2021-06-05 03:53:30,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025316586] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:30,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194249135] [2021-06-05 03:53:30,260 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 386 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 386 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:30,288 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-05 03:53:30,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:30,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 03:53:30,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:30,379 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 44 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:30,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194249135] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:30,379 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:30,379 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 15 [2021-06-05 03:53:30,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531151962] [2021-06-05 03:53:30,379 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:53:30,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:30,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:53:30,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:53:30,379 INFO L87 Difference]: Start difference. First operand 12541 states and 32944 transitions. Second operand has 16 states, 16 states have (on average 4.0625) internal successors, (65), 15 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:30,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:30,605 INFO L93 Difference]: Finished difference Result 14864 states and 37234 transitions. [2021-06-05 03:53:30,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 03:53:30,606 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.0625) internal successors, (65), 15 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 03:53:30,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:30,622 INFO L225 Difference]: With dead ends: 14864 [2021-06-05 03:53:30,622 INFO L226 Difference]: Without dead ends: 14837 [2021-06-05 03:53:30,622 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 109.6ms TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:53:30,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14837 states. [2021-06-05 03:53:30,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14837 to 12541. [2021-06-05 03:53:30,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12541 states, 12540 states have (on average 2.626874003189793) internal successors, (32941), 12540 states have internal predecessors, (32941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:30,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12541 states to 12541 states and 32941 transitions. [2021-06-05 03:53:30,787 INFO L78 Accepts]: Start accepts. Automaton has 12541 states and 32941 transitions. Word has length 53 [2021-06-05 03:53:30,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:30,787 INFO L482 AbstractCegarLoop]: Abstraction has 12541 states and 32941 transitions. [2021-06-05 03:53:30,787 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.0625) internal successors, (65), 15 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:30,787 INFO L276 IsEmpty]: Start isEmpty. Operand 12541 states and 32941 transitions. [2021-06-05 03:53:30,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 03:53:30,794 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:30,794 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:30,994 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 386 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable794 [2021-06-05 03:53:30,994 INFO L430 AbstractCegarLoop]: === Iteration 395 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:30,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:30,995 INFO L82 PathProgramCache]: Analyzing trace with hash 259297804, now seen corresponding path program 228 times [2021-06-05 03:53:30,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:30,995 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842074810] [2021-06-05 03:53:30,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:30,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:31,088 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 117 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:53:31,088 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:31,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842074810] [2021-06-05 03:53:31,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842074810] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:31,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453469422] [2021-06-05 03:53:31,089 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 387 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 387 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:31,117 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-05 03:53:31,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:31,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 03:53:31,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:31,186 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 118 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:53:31,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453469422] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:31,186 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:31,186 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 03:53:31,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583293255] [2021-06-05 03:53:31,187 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:53:31,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:31,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:53:31,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:53:31,187 INFO L87 Difference]: Start difference. First operand 12541 states and 32941 transitions. Second operand has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 13 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:32,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:32,714 INFO L93 Difference]: Finished difference Result 23524 states and 56000 transitions. [2021-06-05 03:53:32,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-06-05 03:53:32,714 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 13 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 03:53:32,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:32,738 INFO L225 Difference]: With dead ends: 23524 [2021-06-05 03:53:32,738 INFO L226 Difference]: Without dead ends: 23068 [2021-06-05 03:53:32,739 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3318 ImplicationChecksByTransitivity, 942.5ms TimeCoverageRelationStatistics Valid=807, Invalid=8123, Unknown=0, NotChecked=0, Total=8930 [2021-06-05 03:53:32,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23068 states. [2021-06-05 03:53:32,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23068 to 13305. [2021-06-05 03:53:32,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13305 states, 13304 states have (on average 2.6126728803367407) internal successors, (34759), 13304 states have internal predecessors, (34759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:32,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13305 states to 13305 states and 34759 transitions. [2021-06-05 03:53:32,987 INFO L78 Accepts]: Start accepts. Automaton has 13305 states and 34759 transitions. Word has length 53 [2021-06-05 03:53:32,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:32,987 INFO L482 AbstractCegarLoop]: Abstraction has 13305 states and 34759 transitions. [2021-06-05 03:53:32,987 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 13 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:32,987 INFO L276 IsEmpty]: Start isEmpty. Operand 13305 states and 34759 transitions. [2021-06-05 03:53:32,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 03:53:32,994 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:32,994 INFO L521 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:33,194 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable799,387 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:33,195 INFO L430 AbstractCegarLoop]: === Iteration 396 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:33,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:33,195 INFO L82 PathProgramCache]: Analyzing trace with hash -2142096623, now seen corresponding path program 229 times [2021-06-05 03:53:33,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:33,195 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753426246] [2021-06-05 03:53:33,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:33,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:33,279 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 41 proven. 94 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:53:33,280 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:33,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753426246] [2021-06-05 03:53:33,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753426246] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:33,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146989765] [2021-06-05 03:53:33,280 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 388 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 388 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:33,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:33,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 03:53:33,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:33,375 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 41 proven. 94 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:53:33,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146989765] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:33,376 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:33,376 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-06-05 03:53:33,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490842437] [2021-06-05 03:53:33,376 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:53:33,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:33,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:53:33,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:53:33,376 INFO L87 Difference]: Start difference. First operand 13305 states and 34759 transitions. Second operand has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:33,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:33,585 INFO L93 Difference]: Finished difference Result 15631 states and 39032 transitions. [2021-06-05 03:53:33,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 03:53:33,586 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 03:53:33,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:33,601 INFO L225 Difference]: With dead ends: 15631 [2021-06-05 03:53:33,601 INFO L226 Difference]: Without dead ends: 15595 [2021-06-05 03:53:33,602 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 103.9ms TimeCoverageRelationStatistics Valid=102, Invalid=204, Unknown=0, NotChecked=0, Total=306 [2021-06-05 03:53:33,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15595 states. [2021-06-05 03:53:33,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15595 to 13305. [2021-06-05 03:53:33,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13305 states, 13304 states have (on average 2.61244738424534) internal successors, (34756), 13304 states have internal predecessors, (34756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:33,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13305 states to 13305 states and 34756 transitions. [2021-06-05 03:53:33,780 INFO L78 Accepts]: Start accepts. Automaton has 13305 states and 34756 transitions. Word has length 53 [2021-06-05 03:53:33,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:33,780 INFO L482 AbstractCegarLoop]: Abstraction has 13305 states and 34756 transitions. [2021-06-05 03:53:33,780 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:33,780 INFO L276 IsEmpty]: Start isEmpty. Operand 13305 states and 34756 transitions. [2021-06-05 03:53:33,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 03:53:33,788 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:33,788 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:33,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 388 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable800 [2021-06-05 03:53:33,988 INFO L430 AbstractCegarLoop]: === Iteration 397 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:33,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:33,988 INFO L82 PathProgramCache]: Analyzing trace with hash 105983938, now seen corresponding path program 230 times [2021-06-05 03:53:33,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:33,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846473921] [2021-06-05 03:53:33,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:33,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:34,089 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 117 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:53:34,090 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:34,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846473921] [2021-06-05 03:53:34,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846473921] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:34,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325972315] [2021-06-05 03:53:34,090 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 389 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 389 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:34,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:53:34,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:34,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 03:53:34,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:34,184 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 118 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:53:34,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325972315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:34,185 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:34,185 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 03:53:34,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656680299] [2021-06-05 03:53:34,185 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 03:53:34,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:34,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 03:53:34,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:53:34,185 INFO L87 Difference]: Start difference. First operand 13305 states and 34756 transitions. Second operand has 15 states, 15 states have (on average 3.6) internal successors, (54), 14 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:36,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:36,825 INFO L93 Difference]: Finished difference Result 39717 states and 90677 transitions. [2021-06-05 03:53:36,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 159 states. [2021-06-05 03:53:36,826 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 14 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 03:53:36,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:36,866 INFO L225 Difference]: With dead ends: 39717 [2021-06-05 03:53:36,866 INFO L226 Difference]: Without dead ends: 38331 [2021-06-05 03:53:36,868 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10453 ImplicationChecksByTransitivity, 1928.1ms TimeCoverageRelationStatistics Valid=1941, Invalid=23181, Unknown=0, NotChecked=0, Total=25122 [2021-06-05 03:53:36,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38331 states. [2021-06-05 03:53:37,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38331 to 14578. [2021-06-05 03:53:37,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14578 states, 14577 states have (on average 2.592371544213487) internal successors, (37789), 14577 states have internal predecessors, (37789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:37,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14578 states to 14578 states and 37789 transitions. [2021-06-05 03:53:37,159 INFO L78 Accepts]: Start accepts. Automaton has 14578 states and 37789 transitions. Word has length 53 [2021-06-05 03:53:37,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:37,159 INFO L482 AbstractCegarLoop]: Abstraction has 14578 states and 37789 transitions. [2021-06-05 03:53:37,159 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 14 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:37,159 INFO L276 IsEmpty]: Start isEmpty. Operand 14578 states and 37789 transitions. [2021-06-05 03:53:37,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 03:53:37,167 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:37,167 INFO L521 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:37,367 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable806,389 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:37,367 INFO L430 AbstractCegarLoop]: === Iteration 398 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:37,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:37,367 INFO L82 PathProgramCache]: Analyzing trace with hash 855401591, now seen corresponding path program 231 times [2021-06-05 03:53:37,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:37,367 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170300874] [2021-06-05 03:53:37,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:37,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:37,461 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 45 proven. 90 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:53:37,462 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:37,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170300874] [2021-06-05 03:53:37,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170300874] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:37,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186248288] [2021-06-05 03:53:37,462 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 390 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 390 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:37,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-05 03:53:37,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:37,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 03:53:37,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:37,563 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 45 proven. 90 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:53:37,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186248288] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:37,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:37,564 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-06-05 03:53:37,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165335395] [2021-06-05 03:53:37,564 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 03:53:37,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:37,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 03:53:37,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:53:37,564 INFO L87 Difference]: Start difference. First operand 14578 states and 37789 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:37,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:37,780 INFO L93 Difference]: Finished difference Result 17260 states and 42750 transitions. [2021-06-05 03:53:37,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 03:53:37,781 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 03:53:37,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:37,798 INFO L225 Difference]: With dead ends: 17260 [2021-06-05 03:53:37,798 INFO L226 Difference]: Without dead ends: 17215 [2021-06-05 03:53:37,798 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 122.9ms TimeCoverageRelationStatistics Valid=123, Invalid=257, Unknown=0, NotChecked=0, Total=380 [2021-06-05 03:53:37,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17215 states. [2021-06-05 03:53:37,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17215 to 14578. [2021-06-05 03:53:37,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14578 states, 14577 states have (on average 2.5921657405501817) internal successors, (37786), 14577 states have internal predecessors, (37786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:37,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14578 states to 14578 states and 37786 transitions. [2021-06-05 03:53:37,989 INFO L78 Accepts]: Start accepts. Automaton has 14578 states and 37786 transitions. Word has length 53 [2021-06-05 03:53:37,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:37,989 INFO L482 AbstractCegarLoop]: Abstraction has 14578 states and 37786 transitions. [2021-06-05 03:53:37,989 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:37,989 INFO L276 IsEmpty]: Start isEmpty. Operand 14578 states and 37786 transitions. [2021-06-05 03:53:37,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 03:53:37,997 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:37,997 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:38,197 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 390 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable807 [2021-06-05 03:53:38,197 INFO L430 AbstractCegarLoop]: === Iteration 399 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:38,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:38,198 INFO L82 PathProgramCache]: Analyzing trace with hash -1717162420, now seen corresponding path program 232 times [2021-06-05 03:53:38,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:38,198 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647973158] [2021-06-05 03:53:38,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:38,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:38,309 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 117 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:53:38,309 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:38,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647973158] [2021-06-05 03:53:38,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647973158] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:38,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240743735] [2021-06-05 03:53:38,309 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 391 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 391 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:38,334 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:53:38,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:38,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 03:53:38,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:38,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 03:53:38,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2021-06-05 03:53:38,491 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 03:53:38,492 INFO L628 ElimStorePlain]: treesize reduction 20, result has 4.8 percent of original size [2021-06-05 03:53:38,492 INFO L518 ElimStorePlain]: Eliminatee B vanished before elimination [2021-06-05 03:53:38,493 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 03:53:38,493 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:1 [2021-06-05 03:53:38,499 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 18 proven. 114 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:53:38,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240743735] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:38,499 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:38,499 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2021-06-05 03:53:38,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244619027] [2021-06-05 03:53:38,499 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 03:53:38,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:38,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 03:53:38,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2021-06-05 03:53:38,500 INFO L87 Difference]: Start difference. First operand 14578 states and 37786 transitions. Second operand has 22 states, 22 states have (on average 3.090909090909091) internal successors, (68), 21 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:43,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:43,067 INFO L93 Difference]: Finished difference Result 44078 states and 101715 transitions. [2021-06-05 03:53:43,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 255 states. [2021-06-05 03:53:43,067 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.090909090909091) internal successors, (68), 21 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 03:53:43,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:43,112 INFO L225 Difference]: With dead ends: 44078 [2021-06-05 03:53:43,113 INFO L226 Difference]: Without dead ends: 42758 [2021-06-05 03:53:43,115 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 253 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28740 ImplicationChecksByTransitivity, 3727.5ms TimeCoverageRelationStatistics Valid=4371, Invalid=60399, Unknown=0, NotChecked=0, Total=64770 [2021-06-05 03:53:43,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42758 states. [2021-06-05 03:53:43,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42758 to 16260. [2021-06-05 03:53:43,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16260 states, 16259 states have (on average 2.578448859093425) internal successors, (41923), 16259 states have internal predecessors, (41923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:43,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16260 states to 16260 states and 41923 transitions. [2021-06-05 03:53:43,443 INFO L78 Accepts]: Start accepts. Automaton has 16260 states and 41923 transitions. Word has length 53 [2021-06-05 03:53:43,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:43,443 INFO L482 AbstractCegarLoop]: Abstraction has 16260 states and 41923 transitions. [2021-06-05 03:53:43,443 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.090909090909091) internal successors, (68), 21 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:43,443 INFO L276 IsEmpty]: Start isEmpty. Operand 16260 states and 41923 transitions. [2021-06-05 03:53:43,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 03:53:43,451 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:43,451 INFO L521 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:43,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable814,391 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:43,652 INFO L430 AbstractCegarLoop]: === Iteration 400 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:43,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:43,652 INFO L82 PathProgramCache]: Analyzing trace with hash -1635323567, now seen corresponding path program 233 times [2021-06-05 03:53:43,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:43,652 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968771750] [2021-06-05 03:53:43,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:43,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:43,758 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 55 proven. 80 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:53:43,758 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:43,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968771750] [2021-06-05 03:53:43,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968771750] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:43,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210091222] [2021-06-05 03:53:43,758 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 392 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 392 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:43,786 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 03:53:43,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:43,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 03:53:43,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:43,885 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 55 proven. 80 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:53:43,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210091222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:43,885 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:43,885 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 18 [2021-06-05 03:53:43,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244205326] [2021-06-05 03:53:43,885 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:53:43,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:43,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:53:43,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:53:43,886 INFO L87 Difference]: Start difference. First operand 16260 states and 41923 transitions. Second operand has 19 states, 19 states have (on average 3.4210526315789473) internal successors, (65), 18 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:44,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:44,185 INFO L93 Difference]: Finished difference Result 19781 states and 48513 transitions. [2021-06-05 03:53:44,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 03:53:44,185 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.4210526315789473) internal successors, (65), 18 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 03:53:44,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:44,205 INFO L225 Difference]: With dead ends: 19781 [2021-06-05 03:53:44,205 INFO L226 Difference]: Without dead ends: 19727 [2021-06-05 03:53:44,205 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 186.1ms TimeCoverageRelationStatistics Valid=167, Invalid=433, Unknown=0, NotChecked=0, Total=600 [2021-06-05 03:53:44,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19727 states. [2021-06-05 03:53:44,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19727 to 16260. [2021-06-05 03:53:44,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16260 states, 16259 states have (on average 2.578264345900732) internal successors, (41920), 16259 states have internal predecessors, (41920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:44,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16260 states to 16260 states and 41920 transitions. [2021-06-05 03:53:44,421 INFO L78 Accepts]: Start accepts. Automaton has 16260 states and 41920 transitions. Word has length 53 [2021-06-05 03:53:44,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:44,421 INFO L482 AbstractCegarLoop]: Abstraction has 16260 states and 41920 transitions. [2021-06-05 03:53:44,421 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.4210526315789473) internal successors, (65), 18 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:44,421 INFO L276 IsEmpty]: Start isEmpty. Operand 16260 states and 41920 transitions. [2021-06-05 03:53:44,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 03:53:44,429 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:44,429 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:44,629 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 392 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable815 [2021-06-05 03:53:44,630 INFO L430 AbstractCegarLoop]: === Iteration 401 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:44,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:44,630 INFO L82 PathProgramCache]: Analyzing trace with hash -913888382, now seen corresponding path program 234 times [2021-06-05 03:53:44,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:44,630 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222877292] [2021-06-05 03:53:44,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:44,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:44,814 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:44,815 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:44,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222877292] [2021-06-05 03:53:44,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222877292] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:44,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126778150] [2021-06-05 03:53:44,815 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 393 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 393 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:44,843 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-05 03:53:44,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:44,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 03:53:44,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:44,912 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:44,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126778150] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:44,912 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:44,912 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-06-05 03:53:44,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485212512] [2021-06-05 03:53:44,912 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 03:53:44,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:44,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 03:53:44,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:53:44,913 INFO L87 Difference]: Start difference. First operand 16260 states and 41920 transitions. Second operand has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:45,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:45,551 INFO L93 Difference]: Finished difference Result 21764 states and 52143 transitions. [2021-06-05 03:53:45,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 03:53:45,552 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 03:53:45,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:45,572 INFO L225 Difference]: With dead ends: 21764 [2021-06-05 03:53:45,572 INFO L226 Difference]: Without dead ends: 19982 [2021-06-05 03:53:45,572 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 423.1ms TimeCoverageRelationStatistics Valid=218, Invalid=1042, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 03:53:45,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19982 states. [2021-06-05 03:53:45,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19982 to 11673. [2021-06-05 03:53:45,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11673 states, 11672 states have (on average 2.643762851267992) internal successors, (30858), 11672 states have internal predecessors, (30858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:45,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11673 states to 11673 states and 30858 transitions. [2021-06-05 03:53:45,740 INFO L78 Accepts]: Start accepts. Automaton has 11673 states and 30858 transitions. Word has length 53 [2021-06-05 03:53:45,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:45,740 INFO L482 AbstractCegarLoop]: Abstraction has 11673 states and 30858 transitions. [2021-06-05 03:53:45,740 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:45,740 INFO L276 IsEmpty]: Start isEmpty. Operand 11673 states and 30858 transitions. [2021-06-05 03:53:45,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 03:53:45,747 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:45,747 INFO L521 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:45,947 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable823,393 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:45,947 INFO L430 AbstractCegarLoop]: === Iteration 402 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:45,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:45,948 INFO L82 PathProgramCache]: Analyzing trace with hash -1151949899, now seen corresponding path program 109 times [2021-06-05 03:53:45,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:45,948 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044182374] [2021-06-05 03:53:45,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:45,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:46,009 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 89 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:46,009 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:46,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044182374] [2021-06-05 03:53:46,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044182374] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:46,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556252597] [2021-06-05 03:53:46,010 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 394 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 394 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:46,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:46,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 03:53:46,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:46,118 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 90 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:46,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556252597] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:46,118 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:46,118 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 12 [2021-06-05 03:53:46,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925131185] [2021-06-05 03:53:46,118 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 03:53:46,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:46,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 03:53:46,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:53:46,119 INFO L87 Difference]: Start difference. First operand 11673 states and 30858 transitions. Second operand has 13 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:46,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:46,302 INFO L93 Difference]: Finished difference Result 13241 states and 34204 transitions. [2021-06-05 03:53:46,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 03:53:46,303 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 03:53:46,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:46,316 INFO L225 Difference]: With dead ends: 13241 [2021-06-05 03:53:46,316 INFO L226 Difference]: Without dead ends: 13227 [2021-06-05 03:53:46,317 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 80.6ms TimeCoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:53:46,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13227 states. [2021-06-05 03:53:46,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13227 to 12216. [2021-06-05 03:53:46,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12216 states, 12215 states have (on average 2.644617273843635) internal successors, (32304), 12215 states have internal predecessors, (32304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:46,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12216 states to 12216 states and 32304 transitions. [2021-06-05 03:53:46,473 INFO L78 Accepts]: Start accepts. Automaton has 12216 states and 32304 transitions. Word has length 53 [2021-06-05 03:53:46,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:46,473 INFO L482 AbstractCegarLoop]: Abstraction has 12216 states and 32304 transitions. [2021-06-05 03:53:46,474 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:46,474 INFO L276 IsEmpty]: Start isEmpty. Operand 12216 states and 32304 transitions. [2021-06-05 03:53:46,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 03:53:46,481 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:46,481 INFO L521 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:46,681 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable824,394 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:46,681 INFO L430 AbstractCegarLoop]: === Iteration 403 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:46,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:46,682 INFO L82 PathProgramCache]: Analyzing trace with hash -1773830309, now seen corresponding path program 110 times [2021-06-05 03:53:46,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:46,682 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108032947] [2021-06-05 03:53:46,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:46,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:46,744 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 89 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:53:46,744 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:46,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108032947] [2021-06-05 03:53:46,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108032947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:46,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912174450] [2021-06-05 03:53:46,744 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 395 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 395 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:46,769 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:53:46,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:46,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 03:53:46,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:46,844 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 89 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:53:46,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912174450] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:46,844 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:46,844 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 11 [2021-06-05 03:53:46,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816575442] [2021-06-05 03:53:46,844 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 03:53:46,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:46,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 03:53:46,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:53:46,844 INFO L87 Difference]: Start difference. First operand 12216 states and 32304 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:47,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:47,095 INFO L93 Difference]: Finished difference Result 14309 states and 36490 transitions. [2021-06-05 03:53:47,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 03:53:47,095 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 03:53:47,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:47,111 INFO L225 Difference]: With dead ends: 14309 [2021-06-05 03:53:47,111 INFO L226 Difference]: Without dead ends: 14309 [2021-06-05 03:53:47,111 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 108.6ms TimeCoverageRelationStatistics Valid=141, Invalid=201, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:53:47,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14309 states. [2021-06-05 03:53:47,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14309 to 12222. [2021-06-05 03:53:47,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12222 states, 12221 states have (on average 2.6448735782669175) internal successors, (32323), 12221 states have internal predecessors, (32323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:47,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12222 states to 12222 states and 32323 transitions. [2021-06-05 03:53:47,303 INFO L78 Accepts]: Start accepts. Automaton has 12222 states and 32323 transitions. Word has length 53 [2021-06-05 03:53:47,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:47,303 INFO L482 AbstractCegarLoop]: Abstraction has 12222 states and 32323 transitions. [2021-06-05 03:53:47,303 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:47,303 INFO L276 IsEmpty]: Start isEmpty. Operand 12222 states and 32323 transitions. [2021-06-05 03:53:47,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 03:53:47,310 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:47,310 INFO L521 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:47,510 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable827,395 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:47,511 INFO L430 AbstractCegarLoop]: === Iteration 404 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:47,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:47,511 INFO L82 PathProgramCache]: Analyzing trace with hash 883564531, now seen corresponding path program 111 times [2021-06-05 03:53:47,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:47,511 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574317743] [2021-06-05 03:53:47,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:47,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:47,582 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 90 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:53:47,582 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:47,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574317743] [2021-06-05 03:53:47,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574317743] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:47,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747822563] [2021-06-05 03:53:47,582 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 396 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 396 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:47,610 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-05 03:53:47,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:47,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 03:53:47,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:47,705 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 91 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:53:47,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747822563] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:47,705 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:47,705 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 14 [2021-06-05 03:53:47,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119022845] [2021-06-05 03:53:47,705 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 03:53:47,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:47,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 03:53:47,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:53:47,705 INFO L87 Difference]: Start difference. First operand 12222 states and 32323 transitions. Second operand has 15 states, 15 states have (on average 4.066666666666666) internal successors, (61), 14 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:48,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:48,117 INFO L93 Difference]: Finished difference Result 13621 states and 34955 transitions. [2021-06-05 03:53:48,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 03:53:48,117 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.066666666666666) internal successors, (61), 14 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 03:53:48,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:48,131 INFO L225 Difference]: With dead ends: 13621 [2021-06-05 03:53:48,131 INFO L226 Difference]: Without dead ends: 13621 [2021-06-05 03:53:48,131 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 231.9ms TimeCoverageRelationStatistics Valid=324, Invalid=546, Unknown=0, NotChecked=0, Total=870 [2021-06-05 03:53:48,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13621 states. [2021-06-05 03:53:48,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13621 to 12015. [2021-06-05 03:53:48,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12015 states, 12014 states have (on average 2.647411353421009) internal successors, (31806), 12014 states have internal predecessors, (31806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:48,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12015 states to 12015 states and 31806 transitions. [2021-06-05 03:53:48,285 INFO L78 Accepts]: Start accepts. Automaton has 12015 states and 31806 transitions. Word has length 53 [2021-06-05 03:53:48,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:48,285 INFO L482 AbstractCegarLoop]: Abstraction has 12015 states and 31806 transitions. [2021-06-05 03:53:48,285 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.066666666666666) internal successors, (61), 14 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:48,285 INFO L276 IsEmpty]: Start isEmpty. Operand 12015 states and 31806 transitions. [2021-06-05 03:53:48,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 03:53:48,292 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:48,292 INFO L521 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:48,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable828,396 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:48,493 INFO L430 AbstractCegarLoop]: === Iteration 405 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:48,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:48,493 INFO L82 PathProgramCache]: Analyzing trace with hash 1321467447, now seen corresponding path program 235 times [2021-06-05 03:53:48,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:48,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326136806] [2021-06-05 03:53:48,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:48,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:48,611 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 72 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:48,611 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:48,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326136806] [2021-06-05 03:53:48,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326136806] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:48,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383778167] [2021-06-05 03:53:48,612 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 397 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 397 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:48,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:48,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 03:53:48,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:48,710 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 72 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:48,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383778167] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:48,710 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:48,710 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2021-06-05 03:53:48,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655123592] [2021-06-05 03:53:48,710 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 03:53:48,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:48,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 03:53:48,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:53:48,710 INFO L87 Difference]: Start difference. First operand 12015 states and 31806 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:49,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:49,000 INFO L93 Difference]: Finished difference Result 13804 states and 35062 transitions. [2021-06-05 03:53:49,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 03:53:49,001 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 03:53:49,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:49,015 INFO L225 Difference]: With dead ends: 13804 [2021-06-05 03:53:49,015 INFO L226 Difference]: Without dead ends: 13739 [2021-06-05 03:53:49,016 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 169.1ms TimeCoverageRelationStatistics Valid=171, Invalid=381, Unknown=0, NotChecked=0, Total=552 [2021-06-05 03:53:49,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13739 states. [2021-06-05 03:53:49,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13739 to 12024. [2021-06-05 03:53:49,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12024 states, 12023 states have (on average 2.646594028112784) internal successors, (31820), 12023 states have internal predecessors, (31820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:49,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12024 states to 12024 states and 31820 transitions. [2021-06-05 03:53:49,174 INFO L78 Accepts]: Start accepts. Automaton has 12024 states and 31820 transitions. Word has length 53 [2021-06-05 03:53:49,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:49,174 INFO L482 AbstractCegarLoop]: Abstraction has 12024 states and 31820 transitions. [2021-06-05 03:53:49,174 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:49,175 INFO L276 IsEmpty]: Start isEmpty. Operand 12024 states and 31820 transitions. [2021-06-05 03:53:49,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 03:53:49,182 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:49,182 INFO L521 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:49,382 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 397 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable831 [2021-06-05 03:53:49,382 INFO L430 AbstractCegarLoop]: === Iteration 406 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:49,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:49,382 INFO L82 PathProgramCache]: Analyzing trace with hash -278189192, now seen corresponding path program 236 times [2021-06-05 03:53:49,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:49,382 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830175479] [2021-06-05 03:53:49,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:49,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:49,442 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:53:49,442 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:49,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830175479] [2021-06-05 03:53:49,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830175479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:49,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429917956] [2021-06-05 03:53:49,442 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 398 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 398 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:49,468 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:53:49,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:49,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 03:53:49,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:49,768 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 70 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:49,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429917956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:49,769 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:49,769 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 17] total 25 [2021-06-05 03:53:49,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774382100] [2021-06-05 03:53:49,769 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 03:53:49,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:49,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 03:53:49,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2021-06-05 03:53:49,769 INFO L87 Difference]: Start difference. First operand 12024 states and 31820 transitions. Second operand has 26 states, 26 states have (on average 4.269230769230769) internal successors, (111), 25 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:51,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:51,132 INFO L93 Difference]: Finished difference Result 15072 states and 37802 transitions. [2021-06-05 03:53:51,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 03:53:51,133 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.269230769230769) internal successors, (111), 25 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-05 03:53:51,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:51,148 INFO L225 Difference]: With dead ends: 15072 [2021-06-05 03:53:51,148 INFO L226 Difference]: Without dead ends: 15028 [2021-06-05 03:53:51,148 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 923 ImplicationChecksByTransitivity, 767.5ms TimeCoverageRelationStatistics Valid=786, Invalid=3246, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 03:53:51,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15028 states. [2021-06-05 03:53:51,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15028 to 12811. [2021-06-05 03:53:51,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12811 states, 12810 states have (on average 2.609992193598751) internal successors, (33434), 12810 states have internal predecessors, (33434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:51,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12811 states to 12811 states and 33434 transitions. [2021-06-05 03:53:51,315 INFO L78 Accepts]: Start accepts. Automaton has 12811 states and 33434 transitions. Word has length 56 [2021-06-05 03:53:51,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:51,315 INFO L482 AbstractCegarLoop]: Abstraction has 12811 states and 33434 transitions. [2021-06-05 03:53:51,315 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 4.269230769230769) internal successors, (111), 25 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:51,315 INFO L276 IsEmpty]: Start isEmpty. Operand 12811 states and 33434 transitions. [2021-06-05 03:53:51,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 03:53:51,323 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:51,323 INFO L521 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:51,523 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 398 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable840 [2021-06-05 03:53:51,523 INFO L430 AbstractCegarLoop]: === Iteration 407 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:51,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:51,523 INFO L82 PathProgramCache]: Analyzing trace with hash -1678028872, now seen corresponding path program 237 times [2021-06-05 03:53:51,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:51,524 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843457785] [2021-06-05 03:53:51,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:51,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:51,583 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 03:53:51,583 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:51,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843457785] [2021-06-05 03:53:51,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843457785] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:51,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390298483] [2021-06-05 03:53:51,584 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 399 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 399 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:51,612 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-06-05 03:53:51,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:51,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 03:53:51,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:51,785 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 62 proven. 91 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:53:51,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390298483] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:51,786 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:51,786 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2021-06-05 03:53:51,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609965403] [2021-06-05 03:53:51,786 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:53:51,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:51,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:53:51,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:53:51,786 INFO L87 Difference]: Start difference. First operand 12811 states and 33434 transitions. Second operand has 19 states, 19 states have (on average 5.684210526315789) internal successors, (108), 18 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:52,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:52,661 INFO L93 Difference]: Finished difference Result 16926 states and 41264 transitions. [2021-06-05 03:53:52,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 03:53:52,662 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.684210526315789) internal successors, (108), 18 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-05 03:53:52,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:52,679 INFO L225 Difference]: With dead ends: 16926 [2021-06-05 03:53:52,679 INFO L226 Difference]: Without dead ends: 16834 [2021-06-05 03:53:52,680 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 385.0ms TimeCoverageRelationStatistics Valid=323, Invalid=1483, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 03:53:52,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16834 states. [2021-06-05 03:53:52,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16834 to 12990. [2021-06-05 03:53:52,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12990 states, 12989 states have (on average 2.6092847794287475) internal successors, (33892), 12989 states have internal predecessors, (33892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:52,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12990 states to 12990 states and 33892 transitions. [2021-06-05 03:53:52,854 INFO L78 Accepts]: Start accepts. Automaton has 12990 states and 33892 transitions. Word has length 56 [2021-06-05 03:53:52,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:52,854 INFO L482 AbstractCegarLoop]: Abstraction has 12990 states and 33892 transitions. [2021-06-05 03:53:52,854 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.684210526315789) internal successors, (108), 18 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:52,854 INFO L276 IsEmpty]: Start isEmpty. Operand 12990 states and 33892 transitions. [2021-06-05 03:53:52,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 03:53:52,862 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:52,862 INFO L521 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:53,062 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 399 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable841 [2021-06-05 03:53:53,063 INFO L430 AbstractCegarLoop]: === Iteration 408 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:53,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:53,063 INFO L82 PathProgramCache]: Analyzing trace with hash 173585170, now seen corresponding path program 238 times [2021-06-05 03:53:53,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:53,063 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203276282] [2021-06-05 03:53:53,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:53,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:53,123 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 03:53:53,123 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:53,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203276282] [2021-06-05 03:53:53,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203276282] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:53,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202624850] [2021-06-05 03:53:53,123 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 400 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 400 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:53,149 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:53:53,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:53,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 03:53:53,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:53,215 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 03:53:53,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202624850] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:53,215 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:53,215 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 03:53:53,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602588451] [2021-06-05 03:53:53,215 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 03:53:53,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:53,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 03:53:53,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-06-05 03:53:53,216 INFO L87 Difference]: Start difference. First operand 12990 states and 33892 transitions. Second operand has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:53,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:53,544 INFO L93 Difference]: Finished difference Result 14078 states and 35927 transitions. [2021-06-05 03:53:53,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 03:53:53,544 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-05 03:53:53,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:53,558 INFO L225 Difference]: With dead ends: 14078 [2021-06-05 03:53:53,558 INFO L226 Difference]: Without dead ends: 14012 [2021-06-05 03:53:53,558 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 49.1ms TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-06-05 03:53:53,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14012 states. [2021-06-05 03:53:53,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14012 to 13057. [2021-06-05 03:53:53,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13057 states, 13056 states have (on average 2.604549632352941) internal successors, (34005), 13056 states have internal predecessors, (34005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:53,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13057 states to 13057 states and 34005 transitions. [2021-06-05 03:53:53,711 INFO L78 Accepts]: Start accepts. Automaton has 13057 states and 34005 transitions. Word has length 56 [2021-06-05 03:53:53,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:53,711 INFO L482 AbstractCegarLoop]: Abstraction has 13057 states and 34005 transitions. [2021-06-05 03:53:53,711 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:53,711 INFO L276 IsEmpty]: Start isEmpty. Operand 13057 states and 34005 transitions. [2021-06-05 03:53:53,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 03:53:53,719 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:53,719 INFO L521 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:53,919 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 400 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable842 [2021-06-05 03:53:53,919 INFO L430 AbstractCegarLoop]: === Iteration 409 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:53,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:53,919 INFO L82 PathProgramCache]: Analyzing trace with hash 1342527864, now seen corresponding path program 239 times [2021-06-05 03:53:53,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:53,920 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129022254] [2021-06-05 03:53:53,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:53,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:53,974 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 03:53:53,975 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:53,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129022254] [2021-06-05 03:53:53,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129022254] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:53,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041084614] [2021-06-05 03:53:53,975 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 401 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 401 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:54,006 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-06-05 03:53:54,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:54,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 03:53:54,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:54,066 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 03:53:54,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041084614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:54,066 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:54,066 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 03:53:54,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604004844] [2021-06-05 03:53:54,066 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 03:53:54,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:54,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 03:53:54,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-06-05 03:53:54,067 INFO L87 Difference]: Start difference. First operand 13057 states and 34005 transitions. Second operand has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:54,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:54,366 INFO L93 Difference]: Finished difference Result 14112 states and 36011 transitions. [2021-06-05 03:53:54,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 03:53:54,366 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-05 03:53:54,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:54,379 INFO L225 Difference]: With dead ends: 14112 [2021-06-05 03:53:54,380 INFO L226 Difference]: Without dead ends: 14074 [2021-06-05 03:53:54,380 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 44.5ms TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-06-05 03:53:54,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14074 states. [2021-06-05 03:53:54,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14074 to 13111. [2021-06-05 03:53:54,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13111 states, 13110 states have (on average 2.6011441647597255) internal successors, (34101), 13110 states have internal predecessors, (34101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:54,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13111 states to 13111 states and 34101 transitions. [2021-06-05 03:53:54,539 INFO L78 Accepts]: Start accepts. Automaton has 13111 states and 34101 transitions. Word has length 56 [2021-06-05 03:53:54,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:54,539 INFO L482 AbstractCegarLoop]: Abstraction has 13111 states and 34101 transitions. [2021-06-05 03:53:54,539 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:54,539 INFO L276 IsEmpty]: Start isEmpty. Operand 13111 states and 34101 transitions. [2021-06-05 03:53:54,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 03:53:54,547 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:54,547 INFO L521 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:54,747 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable843,401 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:54,747 INFO L430 AbstractCegarLoop]: === Iteration 410 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:54,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:54,747 INFO L82 PathProgramCache]: Analyzing trace with hash 1719488850, now seen corresponding path program 240 times [2021-06-05 03:53:54,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:54,747 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887660879] [2021-06-05 03:53:54,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:54,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:54,807 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 03:53:54,807 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:54,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887660879] [2021-06-05 03:53:54,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887660879] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:54,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476024243] [2021-06-05 03:53:54,807 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 402 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 402 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:54,837 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-06-05 03:53:54,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:54,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 03:53:54,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:55,004 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 32 proven. 121 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:53:55,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476024243] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:55,004 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:55,004 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2021-06-05 03:53:55,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722789415] [2021-06-05 03:53:55,005 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:53:55,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:55,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:53:55,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:53:55,005 INFO L87 Difference]: Start difference. First operand 13111 states and 34101 transitions. Second operand has 19 states, 19 states have (on average 5.684210526315789) internal successors, (108), 18 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:55,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:55,941 INFO L93 Difference]: Finished difference Result 18611 states and 44534 transitions. [2021-06-05 03:53:55,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 03:53:55,942 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.684210526315789) internal successors, (108), 18 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-05 03:53:55,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:55,960 INFO L225 Difference]: With dead ends: 18611 [2021-06-05 03:53:55,960 INFO L226 Difference]: Without dead ends: 18544 [2021-06-05 03:53:55,960 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 384.8ms TimeCoverageRelationStatistics Valid=323, Invalid=1483, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 03:53:55,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18544 states. [2021-06-05 03:53:56,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18544 to 13170. [2021-06-05 03:53:56,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13170 states, 13169 states have (on average 2.5990583947148607) internal successors, (34227), 13169 states have internal predecessors, (34227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:56,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13170 states to 13170 states and 34227 transitions. [2021-06-05 03:53:56,167 INFO L78 Accepts]: Start accepts. Automaton has 13170 states and 34227 transitions. Word has length 56 [2021-06-05 03:53:56,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:56,167 INFO L482 AbstractCegarLoop]: Abstraction has 13170 states and 34227 transitions. [2021-06-05 03:53:56,167 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.684210526315789) internal successors, (108), 18 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:56,167 INFO L276 IsEmpty]: Start isEmpty. Operand 13170 states and 34227 transitions. [2021-06-05 03:53:56,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 03:53:56,175 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:56,175 INFO L521 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:56,375 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 402 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable844 [2021-06-05 03:53:56,375 INFO L430 AbstractCegarLoop]: === Iteration 411 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:56,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:56,376 INFO L82 PathProgramCache]: Analyzing trace with hash 1774337938, now seen corresponding path program 241 times [2021-06-05 03:53:56,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:56,376 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620542736] [2021-06-05 03:53:56,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:56,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:56,435 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 03:53:56,435 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:56,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620542736] [2021-06-05 03:53:56,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620542736] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:56,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773863171] [2021-06-05 03:53:56,435 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 403 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 403 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:56,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:56,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 03:53:56,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:56,525 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 03:53:56,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773863171] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:56,525 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:56,525 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 03:53:56,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230623537] [2021-06-05 03:53:56,525 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 03:53:56,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:56,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 03:53:56,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-06-05 03:53:56,526 INFO L87 Difference]: Start difference. First operand 13170 states and 34227 transitions. Second operand has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:56,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:56,835 INFO L93 Difference]: Finished difference Result 14386 states and 36601 transitions. [2021-06-05 03:53:56,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 03:53:56,836 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-05 03:53:56,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:56,850 INFO L225 Difference]: With dead ends: 14386 [2021-06-05 03:53:56,851 INFO L226 Difference]: Without dead ends: 14350 [2021-06-05 03:53:56,851 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 48.7ms TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-06-05 03:53:56,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14350 states. [2021-06-05 03:53:56,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14350 to 13369. [2021-06-05 03:53:56,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13369 states, 13368 states have (on average 2.590065828845003) internal successors, (34624), 13368 states have internal predecessors, (34624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:57,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13369 states to 13369 states and 34624 transitions. [2021-06-05 03:53:57,010 INFO L78 Accepts]: Start accepts. Automaton has 13369 states and 34624 transitions. Word has length 56 [2021-06-05 03:53:57,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:57,010 INFO L482 AbstractCegarLoop]: Abstraction has 13369 states and 34624 transitions. [2021-06-05 03:53:57,010 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:57,011 INFO L276 IsEmpty]: Start isEmpty. Operand 13369 states and 34624 transitions. [2021-06-05 03:53:57,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 03:53:57,019 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:57,019 INFO L521 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:57,219 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable845,403 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:57,219 INFO L430 AbstractCegarLoop]: === Iteration 412 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:57,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:57,219 INFO L82 PathProgramCache]: Analyzing trace with hash -1948615432, now seen corresponding path program 242 times [2021-06-05 03:53:57,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:57,220 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817610716] [2021-06-05 03:53:57,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:57,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:57,279 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 150 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 03:53:57,279 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:57,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817610716] [2021-06-05 03:53:57,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817610716] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:57,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585919827] [2021-06-05 03:53:57,279 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 404 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 404 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:57,304 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:53:57,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:57,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 03:53:57,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:57,479 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 57 proven. 97 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:53:57,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585919827] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:57,479 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:57,479 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2021-06-05 03:53:57,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849592067] [2021-06-05 03:53:57,479 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:53:57,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:57,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:53:57,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:53:57,480 INFO L87 Difference]: Start difference. First operand 13369 states and 34624 transitions. Second operand has 19 states, 19 states have (on average 5.7894736842105265) internal successors, (110), 18 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:58,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:58,429 INFO L93 Difference]: Finished difference Result 18830 states and 45148 transitions. [2021-06-05 03:53:58,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 03:53:58,429 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.7894736842105265) internal successors, (110), 18 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-05 03:53:58,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:58,449 INFO L225 Difference]: With dead ends: 18830 [2021-06-05 03:53:58,449 INFO L226 Difference]: Without dead ends: 18792 [2021-06-05 03:53:58,449 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 409.7ms TimeCoverageRelationStatistics Valid=323, Invalid=1483, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 03:53:58,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18792 states. [2021-06-05 03:53:58,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18792 to 14037. [2021-06-05 03:53:58,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14037 states, 14036 states have (on average 2.5893416927899686) internal successors, (36344), 14036 states have internal predecessors, (36344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:58,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14037 states to 14037 states and 36344 transitions. [2021-06-05 03:53:58,640 INFO L78 Accepts]: Start accepts. Automaton has 14037 states and 36344 transitions. Word has length 56 [2021-06-05 03:53:58,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:58,640 INFO L482 AbstractCegarLoop]: Abstraction has 14037 states and 36344 transitions. [2021-06-05 03:53:58,640 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.7894736842105265) internal successors, (110), 18 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:58,640 INFO L276 IsEmpty]: Start isEmpty. Operand 14037 states and 36344 transitions. [2021-06-05 03:53:58,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 03:53:58,650 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:58,650 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:58,850 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable846,404 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:58,850 INFO L430 AbstractCegarLoop]: === Iteration 413 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:58,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:58,850 INFO L82 PathProgramCache]: Analyzing trace with hash -848422539, now seen corresponding path program 112 times [2021-06-05 03:53:58,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:58,851 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793110045] [2021-06-05 03:53:58,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:58,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:59,053 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:59,053 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:59,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793110045] [2021-06-05 03:53:59,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793110045] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:59,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724221953] [2021-06-05 03:53:59,053 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 405 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 405 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:59,079 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:53:59,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:59,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 03:53:59,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:59,155 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:59,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724221953] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:59,155 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:59,155 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 18 [2021-06-05 03:53:59,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245758993] [2021-06-05 03:53:59,155 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:53:59,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:59,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:53:59,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=305, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:53:59,156 INFO L87 Difference]: Start difference. First operand 14037 states and 36344 transitions. Second operand has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 18 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:00,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:00,069 INFO L93 Difference]: Finished difference Result 17404 states and 43003 transitions. [2021-06-05 03:54:00,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 03:54:00,069 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 18 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 03:54:00,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:00,087 INFO L225 Difference]: With dead ends: 17404 [2021-06-05 03:54:00,087 INFO L226 Difference]: Without dead ends: 17123 [2021-06-05 03:54:00,087 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 511.9ms TimeCoverageRelationStatistics Valid=273, Invalid=1367, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 03:54:00,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17123 states. [2021-06-05 03:54:00,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17123 to 13513. [2021-06-05 03:54:00,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13513 states, 13512 states have (on average 2.5924363528715215) internal successors, (35029), 13512 states have internal predecessors, (35029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:00,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13513 states to 13513 states and 35029 transitions. [2021-06-05 03:54:00,253 INFO L78 Accepts]: Start accepts. Automaton has 13513 states and 35029 transitions. Word has length 59 [2021-06-05 03:54:00,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:00,253 INFO L482 AbstractCegarLoop]: Abstraction has 13513 states and 35029 transitions. [2021-06-05 03:54:00,254 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 18 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:00,254 INFO L276 IsEmpty]: Start isEmpty. Operand 13513 states and 35029 transitions. [2021-06-05 03:54:00,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 03:54:00,262 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:00,262 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:00,462 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 405 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable847 [2021-06-05 03:54:00,462 INFO L430 AbstractCegarLoop]: === Iteration 414 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:00,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:00,462 INFO L82 PathProgramCache]: Analyzing trace with hash 917417269, now seen corresponding path program 243 times [2021-06-05 03:54:00,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:00,463 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491776721] [2021-06-05 03:54:00,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:00,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:00,628 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:00,628 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:00,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491776721] [2021-06-05 03:54:00,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491776721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:00,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960301218] [2021-06-05 03:54:00,628 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 406 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 406 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:00,659 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-05 03:54:00,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:00,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 03:54:00,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:00,956 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 15 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:00,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960301218] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:00,956 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:00,956 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2021-06-05 03:54:00,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20329506] [2021-06-05 03:54:00,957 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 03:54:00,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:00,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 03:54:00,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=585, Unknown=0, NotChecked=0, Total=650 [2021-06-05 03:54:00,957 INFO L87 Difference]: Start difference. First operand 13513 states and 35029 transitions. Second operand has 26 states, 26 states have (on average 3.269230769230769) internal successors, (85), 25 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:02,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:02,224 INFO L93 Difference]: Finished difference Result 13861 states and 35583 transitions. [2021-06-05 03:54:02,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 03:54:02,224 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.269230769230769) internal successors, (85), 25 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 03:54:02,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:02,239 INFO L225 Difference]: With dead ends: 13861 [2021-06-05 03:54:02,239 INFO L226 Difference]: Without dead ends: 13757 [2021-06-05 03:54:02,239 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 321.9ms TimeCoverageRelationStatistics Valid=65, Invalid=585, Unknown=0, NotChecked=0, Total=650 [2021-06-05 03:54:02,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13757 states. [2021-06-05 03:54:02,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13757 to 13513. [2021-06-05 03:54:02,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13513 states, 13512 states have (on average 2.5887359384251036) internal successors, (34979), 13512 states have internal predecessors, (34979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:02,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13513 states to 13513 states and 34979 transitions. [2021-06-05 03:54:02,446 INFO L78 Accepts]: Start accepts. Automaton has 13513 states and 34979 transitions. Word has length 59 [2021-06-05 03:54:02,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:02,446 INFO L482 AbstractCegarLoop]: Abstraction has 13513 states and 34979 transitions. [2021-06-05 03:54:02,447 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 3.269230769230769) internal successors, (85), 25 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:02,447 INFO L276 IsEmpty]: Start isEmpty. Operand 13513 states and 34979 transitions. [2021-06-05 03:54:02,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 03:54:02,456 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:02,456 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:02,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable848,406 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:02,656 INFO L430 AbstractCegarLoop]: === Iteration 415 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:02,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:02,656 INFO L82 PathProgramCache]: Analyzing trace with hash -1852033535, now seen corresponding path program 244 times [2021-06-05 03:54:02,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:02,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850150225] [2021-06-05 03:54:02,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:02,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:02,750 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 160 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:54:02,750 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:02,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850150225] [2021-06-05 03:54:02,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850150225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:02,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523650171] [2021-06-05 03:54:02,751 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 407 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 407 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:02,778 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:54:02,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:02,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 03:54:02,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:02,865 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 160 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:54:02,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523650171] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:02,865 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:02,865 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 03:54:02,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307307646] [2021-06-05 03:54:02,865 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 03:54:02,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:02,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 03:54:02,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:54:02,866 INFO L87 Difference]: Start difference. First operand 13513 states and 34979 transitions. Second operand has 12 states, 12 states have (on average 5.0) internal successors, (60), 11 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:03,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:03,318 INFO L93 Difference]: Finished difference Result 14176 states and 36253 transitions. [2021-06-05 03:54:03,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 03:54:03,319 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 11 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 03:54:03,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:03,335 INFO L225 Difference]: With dead ends: 14176 [2021-06-05 03:54:03,335 INFO L226 Difference]: Without dead ends: 14176 [2021-06-05 03:54:03,335 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 147.9ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:54:03,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14176 states. [2021-06-05 03:54:03,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14176 to 13534. [2021-06-05 03:54:03,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13534 states, 13533 states have (on average 2.589448015960984) internal successors, (35043), 13533 states have internal predecessors, (35043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:03,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13534 states to 13534 states and 35043 transitions. [2021-06-05 03:54:03,520 INFO L78 Accepts]: Start accepts. Automaton has 13534 states and 35043 transitions. Word has length 59 [2021-06-05 03:54:03,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:03,520 INFO L482 AbstractCegarLoop]: Abstraction has 13534 states and 35043 transitions. [2021-06-05 03:54:03,520 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 11 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:03,520 INFO L276 IsEmpty]: Start isEmpty. Operand 13534 states and 35043 transitions. [2021-06-05 03:54:03,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 03:54:03,529 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:03,529 INFO L521 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:03,730 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable849,407 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:03,730 INFO L430 AbstractCegarLoop]: === Iteration 416 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:03,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:03,730 INFO L82 PathProgramCache]: Analyzing trace with hash -267823288, now seen corresponding path program 113 times [2021-06-05 03:54:03,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:03,730 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434659352] [2021-06-05 03:54:03,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:03,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:03,798 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 102 proven. 76 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:54:03,798 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:03,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434659352] [2021-06-05 03:54:03,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434659352] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:03,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174296400] [2021-06-05 03:54:03,799 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 408 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 408 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:03,829 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-05 03:54:03,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:03,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 03:54:03,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:03,930 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 103 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:03,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174296400] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:03,930 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:03,930 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 14 [2021-06-05 03:54:03,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83498554] [2021-06-05 03:54:03,930 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 03:54:03,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:03,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 03:54:03,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:54:03,930 INFO L87 Difference]: Start difference. First operand 13534 states and 35043 transitions. Second operand has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:04,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:04,138 INFO L93 Difference]: Finished difference Result 19967 states and 49349 transitions. [2021-06-05 03:54:04,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 03:54:04,138 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 03:54:04,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:04,160 INFO L225 Difference]: With dead ends: 19967 [2021-06-05 03:54:04,160 INFO L226 Difference]: Without dead ends: 19967 [2021-06-05 03:54:04,160 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 87.3ms TimeCoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:54:04,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19967 states. [2021-06-05 03:54:04,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19967 to 14829. [2021-06-05 03:54:04,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14829 states, 14828 states have (on average 2.625573239816563) internal successors, (38932), 14828 states have internal predecessors, (38932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:04,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14829 states to 14829 states and 38932 transitions. [2021-06-05 03:54:04,366 INFO L78 Accepts]: Start accepts. Automaton has 14829 states and 38932 transitions. Word has length 59 [2021-06-05 03:54:04,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:04,366 INFO L482 AbstractCegarLoop]: Abstraction has 14829 states and 38932 transitions. [2021-06-05 03:54:04,367 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:04,367 INFO L276 IsEmpty]: Start isEmpty. Operand 14829 states and 38932 transitions. [2021-06-05 03:54:04,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 03:54:04,376 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:04,376 INFO L521 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:04,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable850,408 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:04,576 INFO L430 AbstractCegarLoop]: === Iteration 417 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:04,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:04,576 INFO L82 PathProgramCache]: Analyzing trace with hash -801688664, now seen corresponding path program 245 times [2021-06-05 03:54:04,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:04,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511429407] [2021-06-05 03:54:04,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:04,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:04,645 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 87 proven. 91 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:54:04,645 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:04,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511429407] [2021-06-05 03:54:04,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511429407] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:04,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210903923] [2021-06-05 03:54:04,645 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 409 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 409 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:04,678 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 03:54:04,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:04,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 03:54:04,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:04,797 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 88 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:04,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210903923] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:04,797 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:04,797 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 19 [2021-06-05 03:54:04,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046642420] [2021-06-05 03:54:04,797 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 03:54:04,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:04,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 03:54:04,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2021-06-05 03:54:04,797 INFO L87 Difference]: Start difference. First operand 14829 states and 38932 transitions. Second operand has 20 states, 20 states have (on average 4.5) internal successors, (90), 19 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:05,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:05,076 INFO L93 Difference]: Finished difference Result 15741 states and 40619 transitions. [2021-06-05 03:54:05,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 03:54:05,076 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.5) internal successors, (90), 19 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 03:54:05,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:05,093 INFO L225 Difference]: With dead ends: 15741 [2021-06-05 03:54:05,093 INFO L226 Difference]: Without dead ends: 15735 [2021-06-05 03:54:05,094 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 108.5ms TimeCoverageRelationStatistics Valid=135, Invalid=285, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:54:05,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15735 states. [2021-06-05 03:54:05,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15735 to 14730. [2021-06-05 03:54:05,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14730 states, 14729 states have (on average 2.6223776223776225) internal successors, (38625), 14729 states have internal predecessors, (38625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:05,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14730 states to 14730 states and 38625 transitions. [2021-06-05 03:54:05,274 INFO L78 Accepts]: Start accepts. Automaton has 14730 states and 38625 transitions. Word has length 59 [2021-06-05 03:54:05,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:05,275 INFO L482 AbstractCegarLoop]: Abstraction has 14730 states and 38625 transitions. [2021-06-05 03:54:05,275 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 4.5) internal successors, (90), 19 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:05,275 INFO L276 IsEmpty]: Start isEmpty. Operand 14730 states and 38625 transitions. [2021-06-05 03:54:05,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 03:54:05,284 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:05,284 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:05,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 409 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable851 [2021-06-05 03:54:05,485 INFO L430 AbstractCegarLoop]: === Iteration 418 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:05,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:05,485 INFO L82 PathProgramCache]: Analyzing trace with hash 925621557, now seen corresponding path program 114 times [2021-06-05 03:54:05,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:05,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081849577] [2021-06-05 03:54:05,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:05,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:05,571 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 9 proven. 165 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:54:05,571 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:05,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081849577] [2021-06-05 03:54:05,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081849577] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:05,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932261477] [2021-06-05 03:54:05,571 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 410 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 410 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:05,659 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-06-05 03:54:05,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:05,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 03:54:05,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:05,738 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 166 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:54:05,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932261477] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:05,738 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:05,739 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 03:54:05,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505168466] [2021-06-05 03:54:05,739 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 03:54:05,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:05,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 03:54:05,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:54:05,739 INFO L87 Difference]: Start difference. First operand 14730 states and 38625 transitions. Second operand has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:06,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:06,203 INFO L93 Difference]: Finished difference Result 16762 states and 42638 transitions. [2021-06-05 03:54:06,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 03:54:06,203 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 03:54:06,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:06,221 INFO L225 Difference]: With dead ends: 16762 [2021-06-05 03:54:06,221 INFO L226 Difference]: Without dead ends: 16710 [2021-06-05 03:54:06,221 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 136.2ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:54:06,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16710 states. [2021-06-05 03:54:06,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16710 to 14900. [2021-06-05 03:54:06,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14900 states, 14899 states have (on average 2.6196389019397275) internal successors, (39030), 14899 states have internal predecessors, (39030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:06,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14900 states to 14900 states and 39030 transitions. [2021-06-05 03:54:06,409 INFO L78 Accepts]: Start accepts. Automaton has 14900 states and 39030 transitions. Word has length 59 [2021-06-05 03:54:06,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:06,409 INFO L482 AbstractCegarLoop]: Abstraction has 14900 states and 39030 transitions. [2021-06-05 03:54:06,409 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:06,409 INFO L276 IsEmpty]: Start isEmpty. Operand 14900 states and 39030 transitions. [2021-06-05 03:54:06,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 03:54:06,419 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:06,419 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:06,619 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 410 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable854 [2021-06-05 03:54:06,619 INFO L430 AbstractCegarLoop]: === Iteration 419 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:06,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:06,620 INFO L82 PathProgramCache]: Analyzing trace with hash -1869012747, now seen corresponding path program 246 times [2021-06-05 03:54:06,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:06,620 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726142207] [2021-06-05 03:54:06,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:06,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:06,700 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 20 proven. 154 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:54:06,700 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:06,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726142207] [2021-06-05 03:54:06,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726142207] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:06,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924064014] [2021-06-05 03:54:06,700 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 411 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 411 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:06,730 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-06-05 03:54:06,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:06,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 03:54:06,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:06,819 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 15 proven. 159 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:54:06,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924064014] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:06,819 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:06,819 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 03:54:06,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620509299] [2021-06-05 03:54:06,819 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 03:54:06,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:06,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 03:54:06,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:54:06,820 INFO L87 Difference]: Start difference. First operand 14900 states and 39030 transitions. Second operand has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:07,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:07,460 INFO L93 Difference]: Finished difference Result 15921 states and 40869 transitions. [2021-06-05 03:54:07,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 03:54:07,461 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 03:54:07,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:07,478 INFO L225 Difference]: With dead ends: 15921 [2021-06-05 03:54:07,478 INFO L226 Difference]: Without dead ends: 15883 [2021-06-05 03:54:07,478 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 136.9ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:54:07,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15883 states. [2021-06-05 03:54:07,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15883 to 14906. [2021-06-05 03:54:07,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14906 states, 14905 states have (on average 2.617309627641731) internal successors, (39011), 14905 states have internal predecessors, (39011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:07,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14906 states to 14906 states and 39011 transitions. [2021-06-05 03:54:07,671 INFO L78 Accepts]: Start accepts. Automaton has 14906 states and 39011 transitions. Word has length 59 [2021-06-05 03:54:07,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:07,671 INFO L482 AbstractCegarLoop]: Abstraction has 14906 states and 39011 transitions. [2021-06-05 03:54:07,671 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:07,671 INFO L276 IsEmpty]: Start isEmpty. Operand 14906 states and 39011 transitions. [2021-06-05 03:54:07,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 03:54:07,680 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:07,680 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:07,881 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 411 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable855 [2021-06-05 03:54:07,881 INFO L430 AbstractCegarLoop]: === Iteration 420 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:07,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:07,881 INFO L82 PathProgramCache]: Analyzing trace with hash 1812418369, now seen corresponding path program 247 times [2021-06-05 03:54:07,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:07,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17540507] [2021-06-05 03:54:07,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:07,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:07,967 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 155 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 03:54:07,967 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:07,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17540507] [2021-06-05 03:54:07,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17540507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:07,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773234883] [2021-06-05 03:54:07,967 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 412 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 412 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:07,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:07,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 03:54:07,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:08,072 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 156 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 03:54:08,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773234883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:08,072 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:08,072 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 03:54:08,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284447120] [2021-06-05 03:54:08,072 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 03:54:08,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:08,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 03:54:08,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:54:08,072 INFO L87 Difference]: Start difference. First operand 14906 states and 39011 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:08,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:08,579 INFO L93 Difference]: Finished difference Result 16341 states and 41812 transitions. [2021-06-05 03:54:08,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 03:54:08,580 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 03:54:08,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:08,596 INFO L225 Difference]: With dead ends: 16341 [2021-06-05 03:54:08,596 INFO L226 Difference]: Without dead ends: 16329 [2021-06-05 03:54:08,596 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 135.9ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:54:08,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16329 states. [2021-06-05 03:54:08,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16329 to 14918. [2021-06-05 03:54:08,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14918 states, 14917 states have (on average 2.61661191928672) internal successors, (39032), 14917 states have internal predecessors, (39032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:08,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14918 states to 14918 states and 39032 transitions. [2021-06-05 03:54:08,840 INFO L78 Accepts]: Start accepts. Automaton has 14918 states and 39032 transitions. Word has length 59 [2021-06-05 03:54:08,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:08,840 INFO L482 AbstractCegarLoop]: Abstraction has 14918 states and 39032 transitions. [2021-06-05 03:54:08,840 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:08,840 INFO L276 IsEmpty]: Start isEmpty. Operand 14918 states and 39032 transitions. [2021-06-05 03:54:08,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 03:54:08,849 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:08,849 INFO L521 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:09,049 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 412 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable856 [2021-06-05 03:54:09,049 INFO L430 AbstractCegarLoop]: === Iteration 421 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:09,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:09,050 INFO L82 PathProgramCache]: Analyzing trace with hash 164060866, now seen corresponding path program 248 times [2021-06-05 03:54:09,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:09,050 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663564638] [2021-06-05 03:54:09,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:09,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:09,119 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 80 proven. 96 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:54:09,119 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:09,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663564638] [2021-06-05 03:54:09,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663564638] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:09,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479424992] [2021-06-05 03:54:09,119 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 413 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 413 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:09,150 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:54:09,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:09,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 03:54:09,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:09,220 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 80 proven. 96 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:54:09,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479424992] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:09,220 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:09,220 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 03:54:09,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738273421] [2021-06-05 03:54:09,221 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 03:54:09,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:09,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 03:54:09,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:54:09,221 INFO L87 Difference]: Start difference. First operand 14918 states and 39032 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:09,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:09,456 INFO L93 Difference]: Finished difference Result 16558 states and 41906 transitions. [2021-06-05 03:54:09,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 03:54:09,456 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 03:54:09,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:09,473 INFO L225 Difference]: With dead ends: 16558 [2021-06-05 03:54:09,473 INFO L226 Difference]: Without dead ends: 16534 [2021-06-05 03:54:09,473 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 81.0ms TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:54:09,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16534 states. [2021-06-05 03:54:09,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16534 to 14871. [2021-06-05 03:54:09,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14871 states, 14870 states have (on average 2.6131136516476126) internal successors, (38857), 14870 states have internal predecessors, (38857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:09,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14871 states to 14871 states and 38857 transitions. [2021-06-05 03:54:09,656 INFO L78 Accepts]: Start accepts. Automaton has 14871 states and 38857 transitions. Word has length 59 [2021-06-05 03:54:09,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:09,656 INFO L482 AbstractCegarLoop]: Abstraction has 14871 states and 38857 transitions. [2021-06-05 03:54:09,656 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:09,657 INFO L276 IsEmpty]: Start isEmpty. Operand 14871 states and 38857 transitions. [2021-06-05 03:54:09,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 03:54:09,666 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:09,666 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:09,866 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable857,413 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:09,866 INFO L430 AbstractCegarLoop]: === Iteration 422 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:09,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:09,867 INFO L82 PathProgramCache]: Analyzing trace with hash -340631593, now seen corresponding path program 249 times [2021-06-05 03:54:09,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:09,867 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890305156] [2021-06-05 03:54:09,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:09,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:09,952 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 160 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:54:09,952 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:09,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890305156] [2021-06-05 03:54:09,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890305156] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:09,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509903754] [2021-06-05 03:54:09,953 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 414 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 414 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:09,982 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-06-05 03:54:09,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:09,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 03:54:09,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:10,061 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 160 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:54:10,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509903754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:10,061 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:10,061 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 03:54:10,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742767027] [2021-06-05 03:54:10,061 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 03:54:10,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:10,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 03:54:10,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:54:10,061 INFO L87 Difference]: Start difference. First operand 14871 states and 38857 transitions. Second operand has 13 states, 13 states have (on average 4.615384615384615) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:10,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:10,627 INFO L93 Difference]: Finished difference Result 17148 states and 43479 transitions. [2021-06-05 03:54:10,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 03:54:10,628 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.615384615384615) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 03:54:10,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:10,645 INFO L225 Difference]: With dead ends: 17148 [2021-06-05 03:54:10,645 INFO L226 Difference]: Without dead ends: 17136 [2021-06-05 03:54:10,645 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 162.9ms TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-06-05 03:54:10,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17136 states. [2021-06-05 03:54:10,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17136 to 14915. [2021-06-05 03:54:10,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14915 states, 14914 states have (on average 2.6129140404988602) internal successors, (38969), 14914 states have internal predecessors, (38969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:10,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14915 states to 14915 states and 38969 transitions. [2021-06-05 03:54:10,829 INFO L78 Accepts]: Start accepts. Automaton has 14915 states and 38969 transitions. Word has length 59 [2021-06-05 03:54:10,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:10,829 INFO L482 AbstractCegarLoop]: Abstraction has 14915 states and 38969 transitions. [2021-06-05 03:54:10,829 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.615384615384615) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:10,829 INFO L276 IsEmpty]: Start isEmpty. Operand 14915 states and 38969 transitions. [2021-06-05 03:54:10,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 03:54:10,838 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:10,838 INFO L521 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:11,038 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 414 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable860 [2021-06-05 03:54:11,038 INFO L430 AbstractCegarLoop]: === Iteration 423 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:11,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:11,039 INFO L82 PathProgramCache]: Analyzing trace with hash -578693110, now seen corresponding path program 115 times [2021-06-05 03:54:11,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:11,039 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384021836] [2021-06-05 03:54:11,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:11,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:11,102 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 108 proven. 70 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:54:11,102 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:11,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384021836] [2021-06-05 03:54:11,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384021836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:11,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848331795] [2021-06-05 03:54:11,103 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 415 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 415 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:11,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:11,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 03:54:11,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:11,209 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 109 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:11,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848331795] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:11,209 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:11,209 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 12 [2021-06-05 03:54:11,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556589531] [2021-06-05 03:54:11,209 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 03:54:11,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:11,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 03:54:11,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:54:11,210 INFO L87 Difference]: Start difference. First operand 14915 states and 38969 transitions. Second operand has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:11,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:11,398 INFO L93 Difference]: Finished difference Result 19459 states and 48107 transitions. [2021-06-05 03:54:11,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 03:54:11,399 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 03:54:11,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:11,419 INFO L225 Difference]: With dead ends: 19459 [2021-06-05 03:54:11,419 INFO L226 Difference]: Without dead ends: 19451 [2021-06-05 03:54:11,420 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 69.8ms TimeCoverageRelationStatistics Valid=88, Invalid=122, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:54:11,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19451 states. [2021-06-05 03:54:11,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19451 to 15127. [2021-06-05 03:54:11,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15127 states, 15126 states have (on average 2.619264841993918) internal successors, (39619), 15126 states have internal predecessors, (39619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:11,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15127 states to 15127 states and 39619 transitions. [2021-06-05 03:54:11,622 INFO L78 Accepts]: Start accepts. Automaton has 15127 states and 39619 transitions. Word has length 59 [2021-06-05 03:54:11,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:11,622 INFO L482 AbstractCegarLoop]: Abstraction has 15127 states and 39619 transitions. [2021-06-05 03:54:11,622 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:11,622 INFO L276 IsEmpty]: Start isEmpty. Operand 15127 states and 39619 transitions. [2021-06-05 03:54:11,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 03:54:11,631 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:11,631 INFO L521 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:11,831 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 415 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable861 [2021-06-05 03:54:11,832 INFO L430 AbstractCegarLoop]: === Iteration 424 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:11,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:11,832 INFO L82 PathProgramCache]: Analyzing trace with hash -1200573520, now seen corresponding path program 116 times [2021-06-05 03:54:11,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:11,832 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752213349] [2021-06-05 03:54:11,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:11,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:11,895 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 108 proven. 69 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:54:11,895 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:11,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752213349] [2021-06-05 03:54:11,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752213349] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:11,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562679519] [2021-06-05 03:54:11,895 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 416 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 416 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:11,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:54:11,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:11,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 03:54:11,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:12,062 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 109 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:54:12,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562679519] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:12,062 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:12,062 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 12 [2021-06-05 03:54:12,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795370759] [2021-06-05 03:54:12,062 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 03:54:12,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:12,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 03:54:12,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:54:12,063 INFO L87 Difference]: Start difference. First operand 15127 states and 39619 transitions. Second operand has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:12,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:12,273 INFO L93 Difference]: Finished difference Result 21539 states and 52894 transitions. [2021-06-05 03:54:12,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 03:54:12,273 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 03:54:12,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:12,295 INFO L225 Difference]: With dead ends: 21539 [2021-06-05 03:54:12,295 INFO L226 Difference]: Without dead ends: 21539 [2021-06-05 03:54:12,295 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 73.5ms TimeCoverageRelationStatistics Valid=88, Invalid=122, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:54:12,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21539 states. [2021-06-05 03:54:12,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21539 to 15133. [2021-06-05 03:54:12,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15133 states, 15132 states have (on average 2.6190192968543484) internal successors, (39631), 15132 states have internal predecessors, (39631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:12,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15133 states to 15133 states and 39631 transitions. [2021-06-05 03:54:12,504 INFO L78 Accepts]: Start accepts. Automaton has 15133 states and 39631 transitions. Word has length 59 [2021-06-05 03:54:12,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:12,504 INFO L482 AbstractCegarLoop]: Abstraction has 15133 states and 39631 transitions. [2021-06-05 03:54:12,504 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:12,504 INFO L276 IsEmpty]: Start isEmpty. Operand 15133 states and 39631 transitions. [2021-06-05 03:54:12,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 03:54:12,513 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:12,513 INFO L521 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:12,713 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable863,416 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:12,714 INFO L430 AbstractCegarLoop]: === Iteration 425 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:12,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:12,714 INFO L82 PathProgramCache]: Analyzing trace with hash 1456821320, now seen corresponding path program 117 times [2021-06-05 03:54:12,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:12,714 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104744025] [2021-06-05 03:54:12,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:12,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:12,786 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 103 proven. 75 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:54:12,786 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:12,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104744025] [2021-06-05 03:54:12,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104744025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:12,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399571489] [2021-06-05 03:54:12,787 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 417 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 417 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:12,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-05 03:54:12,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:12,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 03:54:12,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:12,901 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 104 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:12,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399571489] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:12,901 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:12,901 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2021-06-05 03:54:12,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961445443] [2021-06-05 03:54:12,901 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:54:12,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:12,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:54:12,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:54:12,902 INFO L87 Difference]: Start difference. First operand 15133 states and 39631 transitions. Second operand has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:13,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:13,119 INFO L93 Difference]: Finished difference Result 19875 states and 49164 transitions. [2021-06-05 03:54:13,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 03:54:13,119 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 03:54:13,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:13,139 INFO L225 Difference]: With dead ends: 19875 [2021-06-05 03:54:13,139 INFO L226 Difference]: Without dead ends: 19875 [2021-06-05 03:54:13,140 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 90.3ms TimeCoverageRelationStatistics Valid=107, Invalid=165, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:54:13,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19875 states. [2021-06-05 03:54:13,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19875 to 14798. [2021-06-05 03:54:13,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14798 states, 14797 states have (on average 2.6091099547205516) internal successors, (38607), 14797 states have internal predecessors, (38607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:13,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14798 states to 14798 states and 38607 transitions. [2021-06-05 03:54:13,337 INFO L78 Accepts]: Start accepts. Automaton has 14798 states and 38607 transitions. Word has length 59 [2021-06-05 03:54:13,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:13,337 INFO L482 AbstractCegarLoop]: Abstraction has 14798 states and 38607 transitions. [2021-06-05 03:54:13,337 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:13,337 INFO L276 IsEmpty]: Start isEmpty. Operand 14798 states and 38607 transitions. [2021-06-05 03:54:13,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 03:54:13,347 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:13,347 INFO L521 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:13,547 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 417 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable864 [2021-06-05 03:54:13,547 INFO L430 AbstractCegarLoop]: === Iteration 426 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:13,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:13,547 INFO L82 PathProgramCache]: Analyzing trace with hash 1191927516, now seen corresponding path program 250 times [2021-06-05 03:54:13,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:13,547 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175954015] [2021-06-05 03:54:13,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:13,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:13,620 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 81 proven. 97 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:54:13,620 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:13,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175954015] [2021-06-05 03:54:13,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175954015] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:13,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541405600] [2021-06-05 03:54:13,620 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 418 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 418 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:13,645 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:54:13,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:13,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 03:54:13,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:13,722 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 81 proven. 97 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:54:13,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541405600] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:13,722 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:13,722 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-06-05 03:54:13,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523678052] [2021-06-05 03:54:13,722 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 03:54:13,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:13,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 03:54:13,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:54:13,723 INFO L87 Difference]: Start difference. First operand 14798 states and 38607 transitions. Second operand has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:13,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:13,943 INFO L93 Difference]: Finished difference Result 16237 states and 41157 transitions. [2021-06-05 03:54:13,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 03:54:13,943 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 03:54:13,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:13,959 INFO L225 Difference]: With dead ends: 16237 [2021-06-05 03:54:13,959 INFO L226 Difference]: Without dead ends: 16219 [2021-06-05 03:54:13,959 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 89.6ms TimeCoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:54:13,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16219 states. [2021-06-05 03:54:14,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16219 to 14798. [2021-06-05 03:54:14,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14798 states, 14797 states have (on average 2.608298979522876) internal successors, (38595), 14797 states have internal predecessors, (38595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:14,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14798 states to 14798 states and 38595 transitions. [2021-06-05 03:54:14,140 INFO L78 Accepts]: Start accepts. Automaton has 14798 states and 38595 transitions. Word has length 59 [2021-06-05 03:54:14,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:14,140 INFO L482 AbstractCegarLoop]: Abstraction has 14798 states and 38595 transitions. [2021-06-05 03:54:14,140 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:14,140 INFO L276 IsEmpty]: Start isEmpty. Operand 14798 states and 38595 transitions. [2021-06-05 03:54:14,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 03:54:14,149 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:14,149 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:14,349 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable865,418 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:14,349 INFO L430 AbstractCegarLoop]: === Iteration 427 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:14,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:14,350 INFO L82 PathProgramCache]: Analyzing trace with hash 2094564251, now seen corresponding path program 118 times [2021-06-05 03:54:14,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:14,350 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831362939] [2021-06-05 03:54:14,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:14,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:14,437 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 9 proven. 165 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:54:14,437 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:14,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831362939] [2021-06-05 03:54:14,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831362939] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:14,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625317502] [2021-06-05 03:54:14,438 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 419 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 419 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:14,474 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:54:14,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:14,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 03:54:14,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:14,552 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 166 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:54:14,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625317502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:14,553 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:14,553 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 03:54:14,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12811926] [2021-06-05 03:54:14,553 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 03:54:14,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:14,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 03:54:14,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:54:14,553 INFO L87 Difference]: Start difference. First operand 14798 states and 38595 transitions. Second operand has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:15,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:15,044 INFO L93 Difference]: Finished difference Result 16875 states and 42676 transitions. [2021-06-05 03:54:15,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 03:54:15,044 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 03:54:15,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:15,060 INFO L225 Difference]: With dead ends: 16875 [2021-06-05 03:54:15,060 INFO L226 Difference]: Without dead ends: 16832 [2021-06-05 03:54:15,060 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 137.7ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:54:15,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16832 states. [2021-06-05 03:54:15,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16832 to 14910. [2021-06-05 03:54:15,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14910 states, 14909 states have (on average 2.608357368032732) internal successors, (38888), 14909 states have internal predecessors, (38888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:15,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14910 states to 14910 states and 38888 transitions. [2021-06-05 03:54:15,239 INFO L78 Accepts]: Start accepts. Automaton has 14910 states and 38888 transitions. Word has length 59 [2021-06-05 03:54:15,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:15,239 INFO L482 AbstractCegarLoop]: Abstraction has 14910 states and 38888 transitions. [2021-06-05 03:54:15,239 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:15,239 INFO L276 IsEmpty]: Start isEmpty. Operand 14910 states and 38888 transitions. [2021-06-05 03:54:15,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 03:54:15,248 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:15,248 INFO L521 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:15,449 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 419 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable869 [2021-06-05 03:54:15,449 INFO L430 AbstractCegarLoop]: === Iteration 428 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:15,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:15,449 INFO L82 PathProgramCache]: Analyzing trace with hash 540867394, now seen corresponding path program 251 times [2021-06-05 03:54:15,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:15,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567260738] [2021-06-05 03:54:15,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:15,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:15,504 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 69 proven. 105 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 03:54:15,504 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:15,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567260738] [2021-06-05 03:54:15,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567260738] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:15,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485744239] [2021-06-05 03:54:15,504 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 420 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 420 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:15,533 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-06-05 03:54:15,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:15,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 03:54:15,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:15,635 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 73 proven. 105 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:54:15,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485744239] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:15,635 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:15,636 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 16 [2021-06-05 03:54:15,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333280880] [2021-06-05 03:54:15,636 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 03:54:15,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:15,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 03:54:15,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:54:15,636 INFO L87 Difference]: Start difference. First operand 14910 states and 38888 transitions. Second operand has 17 states, 17 states have (on average 4.823529411764706) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:15,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:15,906 INFO L93 Difference]: Finished difference Result 17259 states and 43116 transitions. [2021-06-05 03:54:15,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 03:54:15,907 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.823529411764706) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 03:54:15,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:15,924 INFO L225 Difference]: With dead ends: 17259 [2021-06-05 03:54:15,924 INFO L226 Difference]: Without dead ends: 17256 [2021-06-05 03:54:15,924 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 81.2ms TimeCoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2021-06-05 03:54:15,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17256 states. [2021-06-05 03:54:16,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17256 to 14884. [2021-06-05 03:54:16,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14884 states, 14883 states have (on average 2.6065309413424713) internal successors, (38793), 14883 states have internal predecessors, (38793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:16,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14884 states to 14884 states and 38793 transitions. [2021-06-05 03:54:16,111 INFO L78 Accepts]: Start accepts. Automaton has 14884 states and 38793 transitions. Word has length 59 [2021-06-05 03:54:16,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:16,111 INFO L482 AbstractCegarLoop]: Abstraction has 14884 states and 38793 transitions. [2021-06-05 03:54:16,111 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.823529411764706) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:16,111 INFO L276 IsEmpty]: Start isEmpty. Operand 14884 states and 38793 transitions. [2021-06-05 03:54:16,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 03:54:16,120 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:16,120 INFO L521 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:16,321 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 420 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable870 [2021-06-05 03:54:16,321 INFO L430 AbstractCegarLoop]: === Iteration 429 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:16,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:16,321 INFO L82 PathProgramCache]: Analyzing trace with hash 747929960, now seen corresponding path program 252 times [2021-06-05 03:54:16,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:16,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678809422] [2021-06-05 03:54:16,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:16,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:16,388 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 65 proven. 109 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 03:54:16,389 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:16,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678809422] [2021-06-05 03:54:16,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678809422] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:16,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988972643] [2021-06-05 03:54:16,389 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 421 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 421 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:16,418 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-06-05 03:54:16,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:16,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 03:54:16,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:16,494 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 65 proven. 109 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 03:54:16,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988972643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:16,494 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:16,494 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 03:54:16,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909769755] [2021-06-05 03:54:16,494 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 03:54:16,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:16,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 03:54:16,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:54:16,494 INFO L87 Difference]: Start difference. First operand 14884 states and 38793 transitions. Second operand has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:16,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:16,699 INFO L93 Difference]: Finished difference Result 17001 states and 42513 transitions. [2021-06-05 03:54:16,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 03:54:16,700 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 03:54:16,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:16,717 INFO L225 Difference]: With dead ends: 17001 [2021-06-05 03:54:16,717 INFO L226 Difference]: Without dead ends: 16983 [2021-06-05 03:54:16,717 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 75.2ms TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:54:16,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16983 states. [2021-06-05 03:54:16,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16983 to 14884. [2021-06-05 03:54:16,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14884 states, 14883 states have (on average 2.605187126251428) internal successors, (38773), 14883 states have internal predecessors, (38773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:16,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14884 states to 14884 states and 38773 transitions. [2021-06-05 03:54:16,900 INFO L78 Accepts]: Start accepts. Automaton has 14884 states and 38773 transitions. Word has length 59 [2021-06-05 03:54:16,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:16,900 INFO L482 AbstractCegarLoop]: Abstraction has 14884 states and 38773 transitions. [2021-06-05 03:54:16,900 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:16,901 INFO L276 IsEmpty]: Start isEmpty. Operand 14884 states and 38773 transitions. [2021-06-05 03:54:16,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 03:54:16,910 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:16,910 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:17,110 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 421 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable872 [2021-06-05 03:54:17,110 INFO L430 AbstractCegarLoop]: === Iteration 430 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:17,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:17,110 INFO L82 PathProgramCache]: Analyzing trace with hash -700070053, now seen corresponding path program 253 times [2021-06-05 03:54:17,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:17,110 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743953629] [2021-06-05 03:54:17,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:17,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:17,190 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 20 proven. 154 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:54:17,190 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:17,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743953629] [2021-06-05 03:54:17,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743953629] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:17,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840458697] [2021-06-05 03:54:17,190 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 422 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 422 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:17,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:17,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 03:54:17,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:17,305 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 15 proven. 159 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:54:17,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840458697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:17,305 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:17,305 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 03:54:17,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828237553] [2021-06-05 03:54:17,306 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 03:54:17,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:17,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 03:54:17,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:54:17,306 INFO L87 Difference]: Start difference. First operand 14884 states and 38773 transitions. Second operand has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:17,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:17,955 INFO L93 Difference]: Finished difference Result 16014 states and 40804 transitions. [2021-06-05 03:54:17,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 03:54:17,955 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 03:54:17,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:17,972 INFO L225 Difference]: With dead ends: 16014 [2021-06-05 03:54:17,972 INFO L226 Difference]: Without dead ends: 15958 [2021-06-05 03:54:17,972 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 135.8ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:54:17,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15958 states. [2021-06-05 03:54:18,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15958 to 14911. [2021-06-05 03:54:18,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14911 states, 14910 states have (on average 2.602012072434608) internal successors, (38796), 14910 states have internal predecessors, (38796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:18,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14911 states to 14911 states and 38796 transitions. [2021-06-05 03:54:18,177 INFO L78 Accepts]: Start accepts. Automaton has 14911 states and 38796 transitions. Word has length 59 [2021-06-05 03:54:18,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:18,177 INFO L482 AbstractCegarLoop]: Abstraction has 14911 states and 38796 transitions. [2021-06-05 03:54:18,177 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:18,177 INFO L276 IsEmpty]: Start isEmpty. Operand 14911 states and 38796 transitions. [2021-06-05 03:54:18,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 03:54:18,186 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:18,186 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:18,387 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable875,422 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:18,387 INFO L430 AbstractCegarLoop]: === Iteration 431 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:18,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:18,387 INFO L82 PathProgramCache]: Analyzing trace with hash -1313606233, now seen corresponding path program 254 times [2021-06-05 03:54:18,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:18,387 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553534365] [2021-06-05 03:54:18,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:18,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:18,475 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 155 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 03:54:18,476 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:18,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553534365] [2021-06-05 03:54:18,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553534365] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:18,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274199889] [2021-06-05 03:54:18,476 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 423 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 423 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:18,503 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:54:18,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:18,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 03:54:18,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:18,582 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 156 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 03:54:18,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274199889] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:18,582 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:18,582 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 03:54:18,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646987033] [2021-06-05 03:54:18,582 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 03:54:18,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:18,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 03:54:18,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:54:18,582 INFO L87 Difference]: Start difference. First operand 14911 states and 38796 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:19,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:19,104 INFO L93 Difference]: Finished difference Result 16567 states and 42026 transitions. [2021-06-05 03:54:19,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 03:54:19,104 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 03:54:19,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:19,121 INFO L225 Difference]: With dead ends: 16567 [2021-06-05 03:54:19,122 INFO L226 Difference]: Without dead ends: 16555 [2021-06-05 03:54:19,122 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 136.0ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:54:19,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16555 states. [2021-06-05 03:54:19,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16555 to 14947. [2021-06-05 03:54:19,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14947 states, 14946 states have (on average 2.6009634684865515) internal successors, (38874), 14946 states have internal predecessors, (38874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:19,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14947 states to 14947 states and 38874 transitions. [2021-06-05 03:54:19,306 INFO L78 Accepts]: Start accepts. Automaton has 14947 states and 38874 transitions. Word has length 59 [2021-06-05 03:54:19,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:19,306 INFO L482 AbstractCegarLoop]: Abstraction has 14947 states and 38874 transitions. [2021-06-05 03:54:19,307 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:19,307 INFO L276 IsEmpty]: Start isEmpty. Operand 14947 states and 38874 transitions. [2021-06-05 03:54:19,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 03:54:19,316 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:19,316 INFO L521 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:19,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 423 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable876 [2021-06-05 03:54:19,516 INFO L430 AbstractCegarLoop]: === Iteration 432 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:19,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:19,517 INFO L82 PathProgramCache]: Analyzing trace with hash -1470905720, now seen corresponding path program 119 times [2021-06-05 03:54:19,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:19,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130528465] [2021-06-05 03:54:19,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:19,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:19,579 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 103 proven. 74 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:54:19,579 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:19,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130528465] [2021-06-05 03:54:19,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130528465] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:19,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870825887] [2021-06-05 03:54:19,579 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 424 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 424 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:19,609 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-06-05 03:54:19,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:19,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 03:54:19,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:19,702 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 105 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:19,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870825887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:19,702 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:19,702 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 14 [2021-06-05 03:54:19,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036774115] [2021-06-05 03:54:19,702 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 03:54:19,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:19,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 03:54:19,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:54:19,703 INFO L87 Difference]: Start difference. First operand 14947 states and 38874 transitions. Second operand has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:19,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:19,897 INFO L93 Difference]: Finished difference Result 19543 states and 48102 transitions. [2021-06-05 03:54:19,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 03:54:19,897 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 03:54:19,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:19,917 INFO L225 Difference]: With dead ends: 19543 [2021-06-05 03:54:19,917 INFO L226 Difference]: Without dead ends: 19523 [2021-06-05 03:54:19,918 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 90.3ms TimeCoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2021-06-05 03:54:19,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19523 states. [2021-06-05 03:54:20,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19523 to 15262. [2021-06-05 03:54:20,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15262 states, 15261 states have (on average 2.6088067623353646) internal successors, (39813), 15261 states have internal predecessors, (39813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:20,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15262 states to 15262 states and 39813 transitions. [2021-06-05 03:54:20,119 INFO L78 Accepts]: Start accepts. Automaton has 15262 states and 39813 transitions. Word has length 59 [2021-06-05 03:54:20,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:20,119 INFO L482 AbstractCegarLoop]: Abstraction has 15262 states and 39813 transitions. [2021-06-05 03:54:20,119 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:20,119 INFO L276 IsEmpty]: Start isEmpty. Operand 15262 states and 39813 transitions. [2021-06-05 03:54:20,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 03:54:20,128 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:20,128 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:20,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable877,424 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:20,329 INFO L430 AbstractCegarLoop]: === Iteration 433 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:20,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:20,329 INFO L82 PathProgramCache]: Analyzing trace with hash 828311101, now seen corresponding path program 255 times [2021-06-05 03:54:20,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:20,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694639130] [2021-06-05 03:54:20,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:20,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:20,413 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 157 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:54:20,414 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:20,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694639130] [2021-06-05 03:54:20,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694639130] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:20,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887853403] [2021-06-05 03:54:20,414 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 425 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 425 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:20,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-06-05 03:54:20,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:20,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 03:54:20,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:20,522 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 158 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:54:20,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887853403] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:20,523 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:20,523 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 03:54:20,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679284119] [2021-06-05 03:54:20,523 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 03:54:20,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:20,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 03:54:20,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:54:20,523 INFO L87 Difference]: Start difference. First operand 15262 states and 39813 transitions. Second operand has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:21,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:21,159 INFO L93 Difference]: Finished difference Result 18379 states and 46239 transitions. [2021-06-05 03:54:21,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 03:54:21,159 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 03:54:21,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:21,222 INFO L225 Difference]: With dead ends: 18379 [2021-06-05 03:54:21,222 INFO L226 Difference]: Without dead ends: 18337 [2021-06-05 03:54:21,222 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 179.8ms TimeCoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-06-05 03:54:21,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18337 states. [2021-06-05 03:54:21,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18337 to 15333. [2021-06-05 03:54:21,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15333 states, 15332 states have (on average 2.6092486303156797) internal successors, (40005), 15332 states have internal predecessors, (40005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:21,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15333 states to 15333 states and 40005 transitions. [2021-06-05 03:54:21,395 INFO L78 Accepts]: Start accepts. Automaton has 15333 states and 40005 transitions. Word has length 59 [2021-06-05 03:54:21,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:21,395 INFO L482 AbstractCegarLoop]: Abstraction has 15333 states and 40005 transitions. [2021-06-05 03:54:21,395 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:21,395 INFO L276 IsEmpty]: Start isEmpty. Operand 15333 states and 40005 transitions. [2021-06-05 03:54:21,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 03:54:21,405 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:21,405 INFO L521 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:21,605 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable880,425 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:21,605 INFO L430 AbstractCegarLoop]: === Iteration 434 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:21,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:21,605 INFO L82 PathProgramCache]: Analyzing trace with hash -1934097086, now seen corresponding path program 256 times [2021-06-05 03:54:21,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:21,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887615321] [2021-06-05 03:54:21,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:21,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:21,674 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 63 proven. 114 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:54:21,674 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:21,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887615321] [2021-06-05 03:54:21,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887615321] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:21,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989016218] [2021-06-05 03:54:21,675 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 426 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 426 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:21,700 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:54:21,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:21,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 03:54:21,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:21,776 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 63 proven. 114 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:54:21,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989016218] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:21,776 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:21,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-06-05 03:54:21,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082743512] [2021-06-05 03:54:21,776 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 03:54:21,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:21,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 03:54:21,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:54:21,777 INFO L87 Difference]: Start difference. First operand 15333 states and 40005 transitions. Second operand has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:22,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:22,055 INFO L93 Difference]: Finished difference Result 17426 states and 43666 transitions. [2021-06-05 03:54:22,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 03:54:22,055 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 03:54:22,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:22,072 INFO L225 Difference]: With dead ends: 17426 [2021-06-05 03:54:22,072 INFO L226 Difference]: Without dead ends: 17402 [2021-06-05 03:54:22,072 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 78.8ms TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:54:22,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17402 states. [2021-06-05 03:54:22,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17402 to 14978. [2021-06-05 03:54:22,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14978 states, 14977 states have (on average 2.6034586365760832) internal successors, (38992), 14977 states have internal predecessors, (38992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:22,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14978 states to 14978 states and 38992 transitions. [2021-06-05 03:54:22,257 INFO L78 Accepts]: Start accepts. Automaton has 14978 states and 38992 transitions. Word has length 59 [2021-06-05 03:54:22,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:22,257 INFO L482 AbstractCegarLoop]: Abstraction has 14978 states and 38992 transitions. [2021-06-05 03:54:22,257 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:22,257 INFO L276 IsEmpty]: Start isEmpty. Operand 14978 states and 38992 transitions. [2021-06-05 03:54:22,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 03:54:22,267 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:22,267 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:22,467 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable881,426 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:22,467 INFO L430 AbstractCegarLoop]: === Iteration 435 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:22,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:22,468 INFO L82 PathProgramCache]: Analyzing trace with hash 983147635, now seen corresponding path program 257 times [2021-06-05 03:54:22,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:22,468 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386377737] [2021-06-05 03:54:22,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:22,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:22,562 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 160 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:54:22,562 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:22,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386377737] [2021-06-05 03:54:22,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386377737] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:22,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844533852] [2021-06-05 03:54:22,562 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 427 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 427 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:22,593 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-06-05 03:54:22,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:22,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 03:54:22,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:22,670 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 160 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:54:22,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844533852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:22,670 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:22,670 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 03:54:22,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610422348] [2021-06-05 03:54:22,670 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:54:22,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:22,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:54:22,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:54:22,671 INFO L87 Difference]: Start difference. First operand 14978 states and 38992 transitions. Second operand has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 13 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:23,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:23,299 INFO L93 Difference]: Finished difference Result 18584 states and 46418 transitions. [2021-06-05 03:54:23,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 03:54:23,300 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 13 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 03:54:23,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:23,319 INFO L225 Difference]: With dead ends: 18584 [2021-06-05 03:54:23,319 INFO L226 Difference]: Without dead ends: 18530 [2021-06-05 03:54:23,319 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 195.1ms TimeCoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2021-06-05 03:54:23,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18530 states. [2021-06-05 03:54:23,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18530 to 14933. [2021-06-05 03:54:23,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14933 states, 14932 states have (on average 2.601125100455398) internal successors, (38840), 14932 states have internal predecessors, (38840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:23,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14933 states to 14933 states and 38840 transitions. [2021-06-05 03:54:23,514 INFO L78 Accepts]: Start accepts. Automaton has 14933 states and 38840 transitions. Word has length 59 [2021-06-05 03:54:23,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:23,514 INFO L482 AbstractCegarLoop]: Abstraction has 14933 states and 38840 transitions. [2021-06-05 03:54:23,514 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 13 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:23,514 INFO L276 IsEmpty]: Start isEmpty. Operand 14933 states and 38840 transitions. [2021-06-05 03:54:23,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 03:54:23,524 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:23,524 INFO L521 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:23,724 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 427 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable885 [2021-06-05 03:54:23,724 INFO L430 AbstractCegarLoop]: === Iteration 436 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:23,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:23,724 INFO L82 PathProgramCache]: Analyzing trace with hash 123205708, now seen corresponding path program 120 times [2021-06-05 03:54:23,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:23,724 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8809962] [2021-06-05 03:54:23,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:23,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:23,786 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 124 proven. 53 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:54:23,786 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:23,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8809962] [2021-06-05 03:54:23,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8809962] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:23,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357313944] [2021-06-05 03:54:23,786 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 428 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 428 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:23,815 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-06-05 03:54:23,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:23,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 03:54:23,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:23,900 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 125 proven. 53 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:54:23,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357313944] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:23,900 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:23,900 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 12 [2021-06-05 03:54:23,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901677756] [2021-06-05 03:54:23,900 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 03:54:23,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:23,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 03:54:23,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:54:23,900 INFO L87 Difference]: Start difference. First operand 14933 states and 38840 transitions. Second operand has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:24,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:24,125 INFO L93 Difference]: Finished difference Result 22981 states and 56099 transitions. [2021-06-05 03:54:24,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 03:54:24,125 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 03:54:24,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:24,150 INFO L225 Difference]: With dead ends: 22981 [2021-06-05 03:54:24,150 INFO L226 Difference]: Without dead ends: 22981 [2021-06-05 03:54:24,150 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 78.5ms TimeCoverageRelationStatistics Valid=102, Invalid=138, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:54:24,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22981 states. [2021-06-05 03:54:24,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22981 to 15053. [2021-06-05 03:54:24,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15053 states, 15052 states have (on average 2.6044379484453892) internal successors, (39202), 15052 states have internal predecessors, (39202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:24,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15053 states to 15053 states and 39202 transitions. [2021-06-05 03:54:24,403 INFO L78 Accepts]: Start accepts. Automaton has 15053 states and 39202 transitions. Word has length 59 [2021-06-05 03:54:24,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:24,403 INFO L482 AbstractCegarLoop]: Abstraction has 15053 states and 39202 transitions. [2021-06-05 03:54:24,403 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:24,403 INFO L276 IsEmpty]: Start isEmpty. Operand 15053 states and 39202 transitions. [2021-06-05 03:54:24,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 03:54:24,413 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:24,413 INFO L521 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:24,613 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable886,428 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:24,614 INFO L430 AbstractCegarLoop]: === Iteration 437 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:24,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:24,614 INFO L82 PathProgramCache]: Analyzing trace with hash -1514366748, now seen corresponding path program 121 times [2021-06-05 03:54:24,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:24,614 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375394644] [2021-06-05 03:54:24,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:24,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:24,684 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 120 proven. 57 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:54:24,684 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:24,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375394644] [2021-06-05 03:54:24,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375394644] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:24,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475266035] [2021-06-05 03:54:24,684 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 429 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 429 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:24,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:24,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 03:54:24,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:24,795 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 121 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:54:24,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475266035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:24,795 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:24,795 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2021-06-05 03:54:24,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832691158] [2021-06-05 03:54:24,795 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:54:24,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:24,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:54:24,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:54:24,795 INFO L87 Difference]: Start difference. First operand 15053 states and 39202 transitions. Second operand has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:25,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:25,045 INFO L93 Difference]: Finished difference Result 22759 states and 55530 transitions. [2021-06-05 03:54:25,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 03:54:25,045 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 03:54:25,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:25,068 INFO L225 Difference]: With dead ends: 22759 [2021-06-05 03:54:25,068 INFO L226 Difference]: Without dead ends: 22759 [2021-06-05 03:54:25,068 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 101.7ms TimeCoverageRelationStatistics Valid=138, Invalid=204, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:54:25,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22759 states. [2021-06-05 03:54:25,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22759 to 15073. [2021-06-05 03:54:25,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15073 states, 15072 states have (on average 2.6047638004246285) internal successors, (39259), 15072 states have internal predecessors, (39259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:25,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15073 states to 15073 states and 39259 transitions. [2021-06-05 03:54:25,296 INFO L78 Accepts]: Start accepts. Automaton has 15073 states and 39259 transitions. Word has length 59 [2021-06-05 03:54:25,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:25,296 INFO L482 AbstractCegarLoop]: Abstraction has 15073 states and 39259 transitions. [2021-06-05 03:54:25,297 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:25,297 INFO L276 IsEmpty]: Start isEmpty. Operand 15073 states and 39259 transitions. [2021-06-05 03:54:25,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 03:54:25,307 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:25,307 INFO L521 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:25,507 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 429 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable887 [2021-06-05 03:54:25,507 INFO L430 AbstractCegarLoop]: === Iteration 438 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:25,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:25,507 INFO L82 PathProgramCache]: Analyzing trace with hash 1090605384, now seen corresponding path program 122 times [2021-06-05 03:54:25,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:25,507 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650075769] [2021-06-05 03:54:25,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:25,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:25,587 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 104 proven. 74 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:54:25,587 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:25,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650075769] [2021-06-05 03:54:25,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650075769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:25,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673857902] [2021-06-05 03:54:25,587 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 430 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 430 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:25,640 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:54:25,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:25,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 03:54:25,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:25,726 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 105 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:25,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673857902] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:25,727 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:25,727 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 14 [2021-06-05 03:54:25,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436379129] [2021-06-05 03:54:25,727 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 03:54:25,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:25,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 03:54:25,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:54:25,727 INFO L87 Difference]: Start difference. First operand 15073 states and 39259 transitions. Second operand has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:26,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:26,023 INFO L93 Difference]: Finished difference Result 19776 states and 48785 transitions. [2021-06-05 03:54:26,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 03:54:26,024 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 03:54:26,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:26,045 INFO L225 Difference]: With dead ends: 19776 [2021-06-05 03:54:26,045 INFO L226 Difference]: Without dead ends: 19776 [2021-06-05 03:54:26,045 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 113.7ms TimeCoverageRelationStatistics Valid=145, Invalid=235, Unknown=0, NotChecked=0, Total=380 [2021-06-05 03:54:26,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19776 states. [2021-06-05 03:54:26,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19776 to 14764. [2021-06-05 03:54:26,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14764 states, 14763 states have (on average 2.5980491769965455) internal successors, (38355), 14763 states have internal predecessors, (38355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:26,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14764 states to 14764 states and 38355 transitions. [2021-06-05 03:54:26,254 INFO L78 Accepts]: Start accepts. Automaton has 14764 states and 38355 transitions. Word has length 59 [2021-06-05 03:54:26,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:26,254 INFO L482 AbstractCegarLoop]: Abstraction has 14764 states and 38355 transitions. [2021-06-05 03:54:26,254 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:26,254 INFO L276 IsEmpty]: Start isEmpty. Operand 14764 states and 38355 transitions. [2021-06-05 03:54:26,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 03:54:26,264 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:26,264 INFO L521 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:26,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 430 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable888 [2021-06-05 03:54:26,464 INFO L430 AbstractCegarLoop]: === Iteration 439 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:26,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:26,464 INFO L82 PathProgramCache]: Analyzing trace with hash 1369750312, now seen corresponding path program 258 times [2021-06-05 03:54:26,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:26,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437083067] [2021-06-05 03:54:26,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:26,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:26,544 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 68 proven. 110 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:54:26,544 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:26,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437083067] [2021-06-05 03:54:26,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437083067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:26,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361105823] [2021-06-05 03:54:26,544 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 431 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 431 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:26,572 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 03:54:26,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:26,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 03:54:26,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:26,651 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 68 proven. 110 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:54:26,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361105823] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:26,651 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:26,651 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-06-05 03:54:26,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353134746] [2021-06-05 03:54:26,651 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:54:26,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:26,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:54:26,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:54:26,651 INFO L87 Difference]: Start difference. First operand 14764 states and 38355 transitions. Second operand has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:26,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:26,918 INFO L93 Difference]: Finished difference Result 16631 states and 41638 transitions. [2021-06-05 03:54:26,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 03:54:26,919 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 03:54:26,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:26,935 INFO L225 Difference]: With dead ends: 16631 [2021-06-05 03:54:26,936 INFO L226 Difference]: Without dead ends: 16604 [2021-06-05 03:54:26,936 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 97.4ms TimeCoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2021-06-05 03:54:26,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16604 states. [2021-06-05 03:54:27,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16604 to 14764. [2021-06-05 03:54:27,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14764 states, 14763 states have (on average 2.597439544807966) internal successors, (38346), 14763 states have internal predecessors, (38346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:27,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14764 states to 14764 states and 38346 transitions. [2021-06-05 03:54:27,153 INFO L78 Accepts]: Start accepts. Automaton has 14764 states and 38346 transitions. Word has length 59 [2021-06-05 03:54:27,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:27,153 INFO L482 AbstractCegarLoop]: Abstraction has 14764 states and 38346 transitions. [2021-06-05 03:54:27,153 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:27,153 INFO L276 IsEmpty]: Start isEmpty. Operand 14764 states and 38346 transitions. [2021-06-05 03:54:27,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 03:54:27,163 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:27,163 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:27,363 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 431 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable889 [2021-06-05 03:54:27,363 INFO L430 AbstractCegarLoop]: === Iteration 440 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:27,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:27,364 INFO L82 PathProgramCache]: Analyzing trace with hash -1823442059, now seen corresponding path program 123 times [2021-06-05 03:54:27,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:27,364 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499994085] [2021-06-05 03:54:27,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:27,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:27,449 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 9 proven. 165 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:54:27,449 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:27,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499994085] [2021-06-05 03:54:27,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499994085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:27,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231332362] [2021-06-05 03:54:27,450 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 432 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 432 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:27,482 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-06-05 03:54:27,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:27,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 03:54:27,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:27,561 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 166 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:54:27,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231332362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:27,561 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:27,561 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 03:54:27,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657469689] [2021-06-05 03:54:27,561 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 03:54:27,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:27,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 03:54:27,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:54:27,562 INFO L87 Difference]: Start difference. First operand 14764 states and 38346 transitions. Second operand has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:28,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:28,073 INFO L93 Difference]: Finished difference Result 16764 states and 42302 transitions. [2021-06-05 03:54:28,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 03:54:28,074 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 03:54:28,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:28,090 INFO L225 Difference]: With dead ends: 16764 [2021-06-05 03:54:28,091 INFO L226 Difference]: Without dead ends: 16726 [2021-06-05 03:54:28,091 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 135.8ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:54:28,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16726 states. [2021-06-05 03:54:28,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16726 to 14878. [2021-06-05 03:54:28,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14878 states, 14877 states have (on average 2.597297842306917) internal successors, (38640), 14877 states have internal predecessors, (38640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:28,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14878 states to 14878 states and 38640 transitions. [2021-06-05 03:54:28,281 INFO L78 Accepts]: Start accepts. Automaton has 14878 states and 38640 transitions. Word has length 59 [2021-06-05 03:54:28,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:28,281 INFO L482 AbstractCegarLoop]: Abstraction has 14878 states and 38640 transitions. [2021-06-05 03:54:28,281 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:28,281 INFO L276 IsEmpty]: Start isEmpty. Operand 14878 states and 38640 transitions. [2021-06-05 03:54:28,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 03:54:28,291 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:28,291 INFO L521 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:28,491 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 432 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable894 [2021-06-05 03:54:28,491 INFO L430 AbstractCegarLoop]: === Iteration 441 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:28,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:28,492 INFO L82 PathProgramCache]: Analyzing trace with hash 917828380, now seen corresponding path program 259 times [2021-06-05 03:54:28,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:28,492 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849761339] [2021-06-05 03:54:28,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:28,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:28,549 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 62 proven. 112 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 03:54:28,549 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:28,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849761339] [2021-06-05 03:54:28,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849761339] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:28,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206438405] [2021-06-05 03:54:28,550 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 433 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 433 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:28,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:28,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 03:54:28,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:28,651 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 62 proven. 112 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 03:54:28,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206438405] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:28,651 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:28,651 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 03:54:28,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544606582] [2021-06-05 03:54:28,651 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 03:54:28,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:28,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 03:54:28,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-06-05 03:54:28,652 INFO L87 Difference]: Start difference. First operand 14878 states and 38640 transitions. Second operand has 11 states, 11 states have (on average 5.0) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:28,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:28,822 INFO L93 Difference]: Finished difference Result 17271 states and 42891 transitions. [2021-06-05 03:54:28,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 03:54:28,823 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 03:54:28,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:28,841 INFO L225 Difference]: With dead ends: 17271 [2021-06-05 03:54:28,841 INFO L226 Difference]: Without dead ends: 17268 [2021-06-05 03:54:28,841 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 48.3ms TimeCoverageRelationStatistics Valid=55, Invalid=77, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:54:28,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17268 states. [2021-06-05 03:54:29,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17268 to 14858. [2021-06-05 03:54:29,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14858 states, 14857 states have (on average 2.5956114962643873) internal successors, (38563), 14857 states have internal predecessors, (38563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:29,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14858 states to 14858 states and 38563 transitions. [2021-06-05 03:54:29,035 INFO L78 Accepts]: Start accepts. Automaton has 14858 states and 38563 transitions. Word has length 59 [2021-06-05 03:54:29,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:29,035 INFO L482 AbstractCegarLoop]: Abstraction has 14858 states and 38563 transitions. [2021-06-05 03:54:29,035 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:29,035 INFO L276 IsEmpty]: Start isEmpty. Operand 14858 states and 38563 transitions. [2021-06-05 03:54:29,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 03:54:29,045 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:29,045 INFO L521 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:29,245 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 433 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable895 [2021-06-05 03:54:29,245 INFO L430 AbstractCegarLoop]: === Iteration 442 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:29,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:29,245 INFO L82 PathProgramCache]: Analyzing trace with hash 1124890946, now seen corresponding path program 260 times [2021-06-05 03:54:29,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:29,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204459503] [2021-06-05 03:54:29,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:29,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:29,305 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 57 proven. 117 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 03:54:29,305 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:29,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204459503] [2021-06-05 03:54:29,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204459503] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:29,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448517477] [2021-06-05 03:54:29,305 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 434 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 434 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:29,331 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:54:29,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:29,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 03:54:29,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:29,407 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 57 proven. 117 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 03:54:29,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448517477] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:29,407 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:29,407 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 03:54:29,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448553588] [2021-06-05 03:54:29,407 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 03:54:29,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:29,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 03:54:29,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:54:29,407 INFO L87 Difference]: Start difference. First operand 14858 states and 38563 transitions. Second operand has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:29,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:29,605 INFO L93 Difference]: Finished difference Result 17287 states and 42863 transitions. [2021-06-05 03:54:29,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 03:54:29,605 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 03:54:29,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:29,622 INFO L225 Difference]: With dead ends: 17287 [2021-06-05 03:54:29,622 INFO L226 Difference]: Without dead ends: 17269 [2021-06-05 03:54:29,622 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 69.1ms TimeCoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:54:29,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17269 states. [2021-06-05 03:54:29,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17269 to 14858. [2021-06-05 03:54:29,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14858 states, 14857 states have (on average 2.593996096116309) internal successors, (38539), 14857 states have internal predecessors, (38539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:29,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14858 states to 14858 states and 38539 transitions. [2021-06-05 03:54:29,808 INFO L78 Accepts]: Start accepts. Automaton has 14858 states and 38539 transitions. Word has length 59 [2021-06-05 03:54:29,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:29,808 INFO L482 AbstractCegarLoop]: Abstraction has 14858 states and 38539 transitions. [2021-06-05 03:54:29,808 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:29,808 INFO L276 IsEmpty]: Start isEmpty. Operand 14858 states and 38539 transitions. [2021-06-05 03:54:29,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 03:54:29,817 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:29,817 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:30,017 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable897,434 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:30,017 INFO L430 AbstractCegarLoop]: === Iteration 443 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:30,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:30,017 INFO L82 PathProgramCache]: Analyzing trace with hash -323109067, now seen corresponding path program 261 times [2021-06-05 03:54:30,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:30,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629175427] [2021-06-05 03:54:30,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:30,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:30,096 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 20 proven. 154 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:54:30,097 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:30,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629175427] [2021-06-05 03:54:30,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629175427] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:30,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458216463] [2021-06-05 03:54:30,097 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 435 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 435 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:30,183 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-06-05 03:54:30,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:30,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 03:54:30,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:30,270 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 15 proven. 159 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:54:30,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458216463] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:30,270 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:30,270 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 03:54:30,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843151288] [2021-06-05 03:54:30,271 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 03:54:30,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:30,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 03:54:30,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:54:30,271 INFO L87 Difference]: Start difference. First operand 14858 states and 38539 transitions. Second operand has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:30,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:30,946 INFO L93 Difference]: Finished difference Result 15989 states and 40590 transitions. [2021-06-05 03:54:30,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 03:54:30,947 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 03:54:30,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:30,963 INFO L225 Difference]: With dead ends: 15989 [2021-06-05 03:54:30,963 INFO L226 Difference]: Without dead ends: 15915 [2021-06-05 03:54:30,963 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 134.8ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:54:30,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15915 states. [2021-06-05 03:54:31,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15915 to 14924. [2021-06-05 03:54:31,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14924 states, 14923 states have (on average 2.588956644106413) internal successors, (38635), 14923 states have internal predecessors, (38635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:31,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14924 states to 14924 states and 38635 transitions. [2021-06-05 03:54:31,141 INFO L78 Accepts]: Start accepts. Automaton has 14924 states and 38635 transitions. Word has length 59 [2021-06-05 03:54:31,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:31,141 INFO L482 AbstractCegarLoop]: Abstraction has 14924 states and 38635 transitions. [2021-06-05 03:54:31,142 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:31,142 INFO L276 IsEmpty]: Start isEmpty. Operand 14924 states and 38635 transitions. [2021-06-05 03:54:31,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 03:54:31,151 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:31,151 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:31,351 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable900,435 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:31,351 INFO L430 AbstractCegarLoop]: === Iteration 444 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:31,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:31,351 INFO L82 PathProgramCache]: Analyzing trace with hash -936645247, now seen corresponding path program 262 times [2021-06-05 03:54:31,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:31,351 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462998618] [2021-06-05 03:54:31,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:31,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:31,450 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 155 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 03:54:31,450 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:31,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462998618] [2021-06-05 03:54:31,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462998618] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:31,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241375379] [2021-06-05 03:54:31,450 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 436 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 436 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:31,484 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:54:31,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:31,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 03:54:31,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:31,564 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 156 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 03:54:31,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241375379] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:31,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:31,564 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 03:54:31,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324254287] [2021-06-05 03:54:31,564 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 03:54:31,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:31,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 03:54:31,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:54:31,564 INFO L87 Difference]: Start difference. First operand 14924 states and 38635 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:32,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:32,090 INFO L93 Difference]: Finished difference Result 16650 states and 42030 transitions. [2021-06-05 03:54:32,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 03:54:32,091 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 03:54:32,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:32,107 INFO L225 Difference]: With dead ends: 16650 [2021-06-05 03:54:32,107 INFO L226 Difference]: Without dead ends: 16638 [2021-06-05 03:54:32,107 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 149.0ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:54:32,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16638 states. [2021-06-05 03:54:32,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16638 to 14998. [2021-06-05 03:54:32,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14998 states, 14997 states have (on average 2.587784223511369) internal successors, (38809), 14997 states have internal predecessors, (38809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:32,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14998 states to 14998 states and 38809 transitions. [2021-06-05 03:54:32,296 INFO L78 Accepts]: Start accepts. Automaton has 14998 states and 38809 transitions. Word has length 59 [2021-06-05 03:54:32,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:32,296 INFO L482 AbstractCegarLoop]: Abstraction has 14998 states and 38809 transitions. [2021-06-05 03:54:32,296 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:32,296 INFO L276 IsEmpty]: Start isEmpty. Operand 14998 states and 38809 transitions. [2021-06-05 03:54:32,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 03:54:32,305 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:32,305 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:32,506 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable901,436 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:32,506 INFO L430 AbstractCegarLoop]: === Iteration 445 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:32,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:32,506 INFO L82 PathProgramCache]: Analyzing trace with hash 1205272087, now seen corresponding path program 263 times [2021-06-05 03:54:32,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:32,506 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952704323] [2021-06-05 03:54:32,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:32,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:32,591 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 157 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:54:32,591 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:32,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952704323] [2021-06-05 03:54:32,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952704323] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:32,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193406210] [2021-06-05 03:54:32,591 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 437 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 437 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:32,622 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-06-05 03:54:32,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:32,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 03:54:32,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:32,700 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 158 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:54:32,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193406210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:32,700 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:32,700 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 03:54:32,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048240465] [2021-06-05 03:54:32,700 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 03:54:32,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:32,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 03:54:32,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:54:32,701 INFO L87 Difference]: Start difference. First operand 14998 states and 38809 transitions. Second operand has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:33,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:33,338 INFO L93 Difference]: Finished difference Result 18719 states and 46626 transitions. [2021-06-05 03:54:33,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 03:54:33,338 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 03:54:33,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:33,358 INFO L225 Difference]: With dead ends: 18719 [2021-06-05 03:54:33,358 INFO L226 Difference]: Without dead ends: 18665 [2021-06-05 03:54:33,358 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 197.6ms TimeCoverageRelationStatistics Valid=93, Invalid=609, Unknown=0, NotChecked=0, Total=702 [2021-06-05 03:54:33,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18665 states. [2021-06-05 03:54:33,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18665 to 15200. [2021-06-05 03:54:33,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15200 states, 15199 states have (on average 2.5887887361010593) internal successors, (39347), 15199 states have internal predecessors, (39347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:33,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15200 states to 15200 states and 39347 transitions. [2021-06-05 03:54:33,596 INFO L78 Accepts]: Start accepts. Automaton has 15200 states and 39347 transitions. Word has length 59 [2021-06-05 03:54:33,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:33,597 INFO L482 AbstractCegarLoop]: Abstraction has 15200 states and 39347 transitions. [2021-06-05 03:54:33,597 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:33,597 INFO L276 IsEmpty]: Start isEmpty. Operand 15200 states and 39347 transitions. [2021-06-05 03:54:33,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 03:54:33,606 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:33,606 INFO L521 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:33,806 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable902,437 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:33,806 INFO L430 AbstractCegarLoop]: === Iteration 446 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:33,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:33,807 INFO L82 PathProgramCache]: Analyzing trace with hash -1557136100, now seen corresponding path program 264 times [2021-06-05 03:54:33,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:33,807 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161022624] [2021-06-05 03:54:33,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:33,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:33,876 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 52 proven. 125 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:54:33,876 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:33,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161022624] [2021-06-05 03:54:33,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161022624] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:33,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531287166] [2021-06-05 03:54:33,876 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 438 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 438 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:33,905 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-06-05 03:54:33,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:33,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 03:54:33,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:33,982 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 52 proven. 125 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:54:33,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531287166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:33,982 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:33,982 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-06-05 03:54:33,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746464071] [2021-06-05 03:54:33,983 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 03:54:33,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:33,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 03:54:33,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:54:33,983 INFO L87 Difference]: Start difference. First operand 15200 states and 39347 transitions. Second operand has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:34,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:34,161 INFO L93 Difference]: Finished difference Result 17641 states and 43655 transitions. [2021-06-05 03:54:34,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 03:54:34,161 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 03:54:34,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:34,181 INFO L225 Difference]: With dead ends: 17641 [2021-06-05 03:54:34,181 INFO L226 Difference]: Without dead ends: 17617 [2021-06-05 03:54:34,182 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 78.3ms TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:54:34,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17617 states. [2021-06-05 03:54:34,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17617 to 15200. [2021-06-05 03:54:34,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15200 states, 15199 states have (on average 2.587670241463254) internal successors, (39330), 15199 states have internal predecessors, (39330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:34,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15200 states to 15200 states and 39330 transitions. [2021-06-05 03:54:34,374 INFO L78 Accepts]: Start accepts. Automaton has 15200 states and 39330 transitions. Word has length 59 [2021-06-05 03:54:34,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:34,374 INFO L482 AbstractCegarLoop]: Abstraction has 15200 states and 39330 transitions. [2021-06-05 03:54:34,374 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:34,375 INFO L276 IsEmpty]: Start isEmpty. Operand 15200 states and 39330 transitions. [2021-06-05 03:54:34,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 03:54:34,384 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:34,384 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:34,585 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 438 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable903 [2021-06-05 03:54:34,585 INFO L430 AbstractCegarLoop]: === Iteration 447 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:34,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:34,585 INFO L82 PathProgramCache]: Analyzing trace with hash 1360108621, now seen corresponding path program 265 times [2021-06-05 03:54:34,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:34,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866958700] [2021-06-05 03:54:34,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:34,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:34,679 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 157 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:54:34,679 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:34,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866958700] [2021-06-05 03:54:34,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866958700] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:34,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489424445] [2021-06-05 03:54:34,679 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 439 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 439 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:34,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:34,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 03:54:34,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:34,782 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 158 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:54:34,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489424445] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:34,782 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:34,782 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 03:54:34,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161250777] [2021-06-05 03:54:34,783 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:54:34,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:34,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:54:34,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:54:34,783 INFO L87 Difference]: Start difference. First operand 15200 states and 39330 transitions. Second operand has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:35,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:35,588 INFO L93 Difference]: Finished difference Result 21862 states and 53696 transitions. [2021-06-05 03:54:35,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 03:54:35,588 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 03:54:35,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:35,611 INFO L225 Difference]: With dead ends: 21862 [2021-06-05 03:54:35,611 INFO L226 Difference]: Without dead ends: 21748 [2021-06-05 03:54:35,611 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 315.7ms TimeCoverageRelationStatistics Valid=183, Invalid=1299, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 03:54:35,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21748 states. [2021-06-05 03:54:35,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21748 to 15415. [2021-06-05 03:54:35,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15415 states, 15414 states have (on average 2.589139743090697) internal successors, (39909), 15414 states have internal predecessors, (39909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:35,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15415 states to 15415 states and 39909 transitions. [2021-06-05 03:54:35,829 INFO L78 Accepts]: Start accepts. Automaton has 15415 states and 39909 transitions. Word has length 59 [2021-06-05 03:54:35,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:35,829 INFO L482 AbstractCegarLoop]: Abstraction has 15415 states and 39909 transitions. [2021-06-05 03:54:35,829 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:35,829 INFO L276 IsEmpty]: Start isEmpty. Operand 15415 states and 39909 transitions. [2021-06-05 03:54:35,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 03:54:35,838 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:35,838 INFO L521 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:36,039 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable907,439 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:36,039 INFO L430 AbstractCegarLoop]: === Iteration 448 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:36,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:36,039 INFO L82 PathProgramCache]: Analyzing trace with hash 1746711298, now seen corresponding path program 266 times [2021-06-05 03:54:36,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:36,039 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608713507] [2021-06-05 03:54:36,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:36,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:36,117 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 53 proven. 124 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:54:36,117 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:36,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608713507] [2021-06-05 03:54:36,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608713507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:36,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400803206] [2021-06-05 03:54:36,117 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 440 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 440 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:36,143 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:54:36,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:36,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 03:54:36,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:36,221 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 53 proven. 124 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:54:36,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400803206] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:36,221 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:36,221 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-06-05 03:54:36,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895313141] [2021-06-05 03:54:36,221 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:54:36,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:36,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:54:36,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:54:36,221 INFO L87 Difference]: Start difference. First operand 15415 states and 39909 transitions. Second operand has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:36,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:36,481 INFO L93 Difference]: Finished difference Result 17893 states and 44283 transitions. [2021-06-05 03:54:36,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 03:54:36,482 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 03:54:36,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:36,499 INFO L225 Difference]: With dead ends: 17893 [2021-06-05 03:54:36,499 INFO L226 Difference]: Without dead ends: 17860 [2021-06-05 03:54:36,499 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 95.6ms TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2021-06-05 03:54:36,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17860 states. [2021-06-05 03:54:36,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17860 to 15072. [2021-06-05 03:54:36,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15072 states, 15071 states have (on average 2.5837038020038485) internal successors, (38939), 15071 states have internal predecessors, (38939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:36,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15072 states to 15072 states and 38939 transitions. [2021-06-05 03:54:36,725 INFO L78 Accepts]: Start accepts. Automaton has 15072 states and 38939 transitions. Word has length 59 [2021-06-05 03:54:36,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:36,725 INFO L482 AbstractCegarLoop]: Abstraction has 15072 states and 38939 transitions. [2021-06-05 03:54:36,725 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:36,725 INFO L276 IsEmpty]: Start isEmpty. Operand 15072 states and 38939 transitions. [2021-06-05 03:54:36,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 03:54:36,735 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:36,735 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:36,935 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable908,440 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:36,935 INFO L430 AbstractCegarLoop]: === Iteration 449 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:36,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:36,936 INFO L82 PathProgramCache]: Analyzing trace with hash 1300417111, now seen corresponding path program 267 times [2021-06-05 03:54:36,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:36,936 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811404299] [2021-06-05 03:54:36,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:36,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:37,040 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 160 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:54:37,040 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:37,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811404299] [2021-06-05 03:54:37,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811404299] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:37,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571765385] [2021-06-05 03:54:37,040 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 441 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 441 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:37,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-06-05 03:54:37,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:37,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 03:54:37,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:37,148 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 160 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:54:37,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571765385] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:37,149 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:37,149 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 03:54:37,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861492161] [2021-06-05 03:54:37,149 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 03:54:37,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:37,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 03:54:37,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:54:37,149 INFO L87 Difference]: Start difference. First operand 15072 states and 38939 transitions. Second operand has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:37,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:37,828 INFO L93 Difference]: Finished difference Result 20407 states and 50176 transitions. [2021-06-05 03:54:37,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 03:54:37,829 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 03:54:37,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:37,849 INFO L225 Difference]: With dead ends: 20407 [2021-06-05 03:54:37,849 INFO L226 Difference]: Without dead ends: 20251 [2021-06-05 03:54:37,849 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 235.4ms TimeCoverageRelationStatistics Valid=113, Invalid=699, Unknown=0, NotChecked=0, Total=812 [2021-06-05 03:54:37,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20251 states. [2021-06-05 03:54:38,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20251 to 14617. [2021-06-05 03:54:38,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14617 states, 14616 states have (on average 2.5764915161466884) internal successors, (37658), 14616 states have internal predecessors, (37658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:38,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14617 states to 14617 states and 37658 transitions. [2021-06-05 03:54:38,048 INFO L78 Accepts]: Start accepts. Automaton has 14617 states and 37658 transitions. Word has length 59 [2021-06-05 03:54:38,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:38,048 INFO L482 AbstractCegarLoop]: Abstraction has 14617 states and 37658 transitions. [2021-06-05 03:54:38,048 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:38,048 INFO L276 IsEmpty]: Start isEmpty. Operand 14617 states and 37658 transitions. [2021-06-05 03:54:38,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 03:54:38,057 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:38,058 INFO L521 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:38,258 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 441 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable913 [2021-06-05 03:54:38,258 INFO L430 AbstractCegarLoop]: === Iteration 450 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:38,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:38,258 INFO L82 PathProgramCache]: Analyzing trace with hash 1062355594, now seen corresponding path program 124 times [2021-06-05 03:54:38,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:38,258 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256775734] [2021-06-05 03:54:38,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:38,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:38,318 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 134 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:54:38,318 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:38,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256775734] [2021-06-05 03:54:38,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256775734] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:38,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914794380] [2021-06-05 03:54:38,318 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 442 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 442 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:38,344 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:54:38,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:38,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 03:54:38,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:38,424 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 135 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:38,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914794380] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:38,424 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:38,424 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 12 [2021-06-05 03:54:38,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975312277] [2021-06-05 03:54:38,424 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 03:54:38,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:38,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 03:54:38,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=92, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:54:38,424 INFO L87 Difference]: Start difference. First operand 14617 states and 37658 transitions. Second operand has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:38,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:38,622 INFO L93 Difference]: Finished difference Result 18811 states and 46226 transitions. [2021-06-05 03:54:38,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 03:54:38,622 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 03:54:38,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:38,642 INFO L225 Difference]: With dead ends: 18811 [2021-06-05 03:54:38,642 INFO L226 Difference]: Without dead ends: 18797 [2021-06-05 03:54:38,642 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 66.1ms TimeCoverageRelationStatistics Valid=86, Invalid=124, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:54:38,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18797 states. [2021-06-05 03:54:38,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18797 to 14958. [2021-06-05 03:54:38,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14958 states, 14957 states have (on average 2.5815337300260746) internal successors, (38612), 14957 states have internal predecessors, (38612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:38,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14958 states to 14958 states and 38612 transitions. [2021-06-05 03:54:38,839 INFO L78 Accepts]: Start accepts. Automaton has 14958 states and 38612 transitions. Word has length 59 [2021-06-05 03:54:38,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:38,839 INFO L482 AbstractCegarLoop]: Abstraction has 14958 states and 38612 transitions. [2021-06-05 03:54:38,839 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:38,839 INFO L276 IsEmpty]: Start isEmpty. Operand 14958 states and 38612 transitions. [2021-06-05 03:54:38,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 03:54:38,848 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:38,848 INFO L521 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:39,049 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable914,442 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:39,049 INFO L430 AbstractCegarLoop]: === Iteration 451 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:39,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:39,049 INFO L82 PathProgramCache]: Analyzing trace with hash 440475184, now seen corresponding path program 125 times [2021-06-05 03:54:39,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:39,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349752865] [2021-06-05 03:54:39,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:39,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:39,110 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 134 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:54:39,110 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:39,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349752865] [2021-06-05 03:54:39,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349752865] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:39,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81831130] [2021-06-05 03:54:39,110 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 443 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 443 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:39,141 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-06-05 03:54:39,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:39,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 03:54:39,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:39,237 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 135 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:54:39,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81831130] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:39,238 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:39,238 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 14 [2021-06-05 03:54:39,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889732024] [2021-06-05 03:54:39,238 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 03:54:39,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:39,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 03:54:39,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:54:39,238 INFO L87 Difference]: Start difference. First operand 14958 states and 38612 transitions. Second operand has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:39,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:39,498 INFO L93 Difference]: Finished difference Result 23655 states and 57376 transitions. [2021-06-05 03:54:39,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 03:54:39,498 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 03:54:39,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:39,522 INFO L225 Difference]: With dead ends: 23655 [2021-06-05 03:54:39,522 INFO L226 Difference]: Without dead ends: 23655 [2021-06-05 03:54:39,522 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 96.4ms TimeCoverageRelationStatistics Valid=144, Invalid=198, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:54:39,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23655 states. [2021-06-05 03:54:39,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23655 to 14973. [2021-06-05 03:54:39,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14973 states, 14972 states have (on average 2.5819529788939355) internal successors, (38657), 14972 states have internal predecessors, (38657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:39,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14973 states to 14973 states and 38657 transitions. [2021-06-05 03:54:39,769 INFO L78 Accepts]: Start accepts. Automaton has 14973 states and 38657 transitions. Word has length 59 [2021-06-05 03:54:39,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:39,769 INFO L482 AbstractCegarLoop]: Abstraction has 14973 states and 38657 transitions. [2021-06-05 03:54:39,769 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:39,769 INFO L276 IsEmpty]: Start isEmpty. Operand 14973 states and 38657 transitions. [2021-06-05 03:54:39,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 03:54:39,778 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:39,778 INFO L521 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:39,978 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable916,443 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:39,978 INFO L430 AbstractCegarLoop]: === Iteration 452 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:39,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:39,979 INFO L82 PathProgramCache]: Analyzing trace with hash -1197097272, now seen corresponding path program 126 times [2021-06-05 03:54:39,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:39,979 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056559764] [2021-06-05 03:54:39,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:39,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:40,048 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 131 proven. 46 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:54:40,048 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:40,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056559764] [2021-06-05 03:54:40,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056559764] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:40,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928695185] [2021-06-05 03:54:40,048 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 444 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 444 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:40,077 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-06-05 03:54:40,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:40,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 03:54:40,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:40,163 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 132 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:54:40,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928695185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:40,164 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:40,164 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2021-06-05 03:54:40,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726422404] [2021-06-05 03:54:40,164 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:54:40,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:40,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:54:40,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:54:40,164 INFO L87 Difference]: Start difference. First operand 14973 states and 38657 transitions. Second operand has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:40,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:40,465 INFO L93 Difference]: Finished difference Result 24867 states and 60280 transitions. [2021-06-05 03:54:40,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 03:54:40,466 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 03:54:40,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:40,493 INFO L225 Difference]: With dead ends: 24867 [2021-06-05 03:54:40,493 INFO L226 Difference]: Without dead ends: 24867 [2021-06-05 03:54:40,493 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 115.8ms TimeCoverageRelationStatistics Valid=170, Invalid=250, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:54:40,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24867 states. [2021-06-05 03:54:40,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24867 to 15014. [2021-06-05 03:54:40,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15014 states, 15013 states have (on average 2.5834276959968028) internal successors, (38785), 15013 states have internal predecessors, (38785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:40,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15014 states to 15014 states and 38785 transitions. [2021-06-05 03:54:40,718 INFO L78 Accepts]: Start accepts. Automaton has 15014 states and 38785 transitions. Word has length 59 [2021-06-05 03:54:40,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:40,719 INFO L482 AbstractCegarLoop]: Abstraction has 15014 states and 38785 transitions. [2021-06-05 03:54:40,719 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:40,719 INFO L276 IsEmpty]: Start isEmpty. Operand 15014 states and 38785 transitions. [2021-06-05 03:54:40,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 03:54:40,728 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:40,728 INFO L521 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:40,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable917,444 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:40,928 INFO L430 AbstractCegarLoop]: === Iteration 453 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:40,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:40,929 INFO L82 PathProgramCache]: Analyzing trace with hash 1407874860, now seen corresponding path program 127 times [2021-06-05 03:54:40,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:40,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981133860] [2021-06-05 03:54:40,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:40,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:41,007 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 118 proven. 59 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:54:41,007 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:41,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981133860] [2021-06-05 03:54:41,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981133860] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:41,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295777043] [2021-06-05 03:54:41,007 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 445 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 445 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:41,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:41,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 03:54:41,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:41,118 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 119 proven. 59 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:54:41,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [295777043] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:41,119 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:41,119 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 14 [2021-06-05 03:54:41,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244398262] [2021-06-05 03:54:41,119 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 03:54:41,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:41,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 03:54:41,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:54:41,119 INFO L87 Difference]: Start difference. First operand 15014 states and 38785 transitions. Second operand has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:41,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:41,421 INFO L93 Difference]: Finished difference Result 23075 states and 56081 transitions. [2021-06-05 03:54:41,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 03:54:41,421 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 03:54:41,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:41,445 INFO L225 Difference]: With dead ends: 23075 [2021-06-05 03:54:41,445 INFO L226 Difference]: Without dead ends: 23075 [2021-06-05 03:54:41,445 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 135.7ms TimeCoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2021-06-05 03:54:41,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23075 states. [2021-06-05 03:54:41,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23075 to 15042. [2021-06-05 03:54:41,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15042 states, 15041 states have (on average 2.5839372382155443) internal successors, (38865), 15041 states have internal predecessors, (38865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:41,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15042 states to 15042 states and 38865 transitions. [2021-06-05 03:54:41,663 INFO L78 Accepts]: Start accepts. Automaton has 15042 states and 38865 transitions. Word has length 59 [2021-06-05 03:54:41,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:41,663 INFO L482 AbstractCegarLoop]: Abstraction has 15042 states and 38865 transitions. [2021-06-05 03:54:41,663 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:41,663 INFO L276 IsEmpty]: Start isEmpty. Operand 15042 states and 38865 transitions. [2021-06-05 03:54:41,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 03:54:41,672 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:41,672 INFO L521 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:41,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 445 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable918 [2021-06-05 03:54:41,872 INFO L430 AbstractCegarLoop]: === Iteration 454 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:41,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:41,873 INFO L82 PathProgramCache]: Analyzing trace with hash 368587848, now seen corresponding path program 128 times [2021-06-05 03:54:41,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:41,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799180643] [2021-06-05 03:54:41,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:41,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:41,961 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 105 proven. 73 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:54:41,962 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:41,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799180643] [2021-06-05 03:54:41,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799180643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:41,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114270105] [2021-06-05 03:54:41,962 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 446 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 446 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:41,987 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:54:41,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:41,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 03:54:41,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:42,086 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 106 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:42,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114270105] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:42,087 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:42,087 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 15 [2021-06-05 03:54:42,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952438704] [2021-06-05 03:54:42,087 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:54:42,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:42,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:54:42,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:54:42,087 INFO L87 Difference]: Start difference. First operand 15042 states and 38865 transitions. Second operand has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:42,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:42,385 INFO L93 Difference]: Finished difference Result 19432 states and 47841 transitions. [2021-06-05 03:54:42,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 03:54:42,385 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 03:54:42,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:42,405 INFO L225 Difference]: With dead ends: 19432 [2021-06-05 03:54:42,405 INFO L226 Difference]: Without dead ends: 19432 [2021-06-05 03:54:42,405 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 141.3ms TimeCoverageRelationStatistics Valid=188, Invalid=318, Unknown=0, NotChecked=0, Total=506 [2021-06-05 03:54:42,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19432 states. [2021-06-05 03:54:42,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19432 to 14656. [2021-06-05 03:54:42,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14656 states, 14655 states have (on average 2.5765950187649267) internal successors, (37760), 14655 states have internal predecessors, (37760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:42,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14656 states to 14656 states and 37760 transitions. [2021-06-05 03:54:42,627 INFO L78 Accepts]: Start accepts. Automaton has 14656 states and 37760 transitions. Word has length 59 [2021-06-05 03:54:42,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:42,627 INFO L482 AbstractCegarLoop]: Abstraction has 14656 states and 37760 transitions. [2021-06-05 03:54:42,627 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:42,627 INFO L276 IsEmpty]: Start isEmpty. Operand 14656 states and 37760 transitions. [2021-06-05 03:54:42,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 03:54:42,637 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:42,637 INFO L521 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:42,837 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 446 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable919 [2021-06-05 03:54:42,837 INFO L430 AbstractCegarLoop]: === Iteration 455 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:42,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:42,837 INFO L82 PathProgramCache]: Analyzing trace with hash -1100977316, now seen corresponding path program 268 times [2021-06-05 03:54:42,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:42,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150195646] [2021-06-05 03:54:42,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:42,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:42,923 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 61 proven. 117 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:54:42,923 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:42,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150195646] [2021-06-05 03:54:42,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150195646] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:42,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096320615] [2021-06-05 03:54:42,923 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 447 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 447 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:42,949 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:54:42,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:42,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 03:54:42,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:43,027 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 61 proven. 117 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:54:43,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096320615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:43,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:43,027 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-06-05 03:54:43,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759442939] [2021-06-05 03:54:43,027 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 03:54:43,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:43,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 03:54:43,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:54:43,028 INFO L87 Difference]: Start difference. First operand 14656 states and 37760 transitions. Second operand has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:43,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:43,316 INFO L93 Difference]: Finished difference Result 16822 states and 41592 transitions. [2021-06-05 03:54:43,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 03:54:43,317 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 03:54:43,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:43,332 INFO L225 Difference]: With dead ends: 16822 [2021-06-05 03:54:43,332 INFO L226 Difference]: Without dead ends: 16786 [2021-06-05 03:54:43,333 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 112.7ms TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2021-06-05 03:54:43,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16786 states. [2021-06-05 03:54:43,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16786 to 14656. [2021-06-05 03:54:43,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14656 states, 14655 states have (on average 2.5757761856021837) internal successors, (37748), 14655 states have internal predecessors, (37748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:43,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14656 states to 14656 states and 37748 transitions. [2021-06-05 03:54:43,514 INFO L78 Accepts]: Start accepts. Automaton has 14656 states and 37748 transitions. Word has length 59 [2021-06-05 03:54:43,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:43,514 INFO L482 AbstractCegarLoop]: Abstraction has 14656 states and 37748 transitions. [2021-06-05 03:54:43,514 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:43,514 INFO L276 IsEmpty]: Start isEmpty. Operand 14656 states and 37748 transitions. [2021-06-05 03:54:43,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 03:54:43,523 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:43,523 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:43,723 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 447 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable920 [2021-06-05 03:54:43,723 INFO L430 AbstractCegarLoop]: === Iteration 456 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:43,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:43,724 INFO L82 PathProgramCache]: Analyzing trace with hash 1176780123, now seen corresponding path program 129 times [2021-06-05 03:54:43,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:43,724 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591249297] [2021-06-05 03:54:43,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:43,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:43,809 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 9 proven. 165 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:54:43,809 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:43,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591249297] [2021-06-05 03:54:43,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591249297] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:43,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607774407] [2021-06-05 03:54:43,809 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 448 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 448 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:43,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-06-05 03:54:43,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:43,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 03:54:43,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:43,920 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 166 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:54:43,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607774407] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:43,920 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:43,920 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 03:54:43,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803769303] [2021-06-05 03:54:43,920 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 03:54:43,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:43,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 03:54:43,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:54:43,921 INFO L87 Difference]: Start difference. First operand 14656 states and 37748 transitions. Second operand has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:44,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:44,403 INFO L93 Difference]: Finished difference Result 16512 states and 41427 transitions. [2021-06-05 03:54:44,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 03:54:44,404 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 03:54:44,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:44,421 INFO L225 Difference]: With dead ends: 16512 [2021-06-05 03:54:44,421 INFO L226 Difference]: Without dead ends: 16481 [2021-06-05 03:54:44,421 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 135.0ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:54:44,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16481 states. [2021-06-05 03:54:44,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16481 to 14732. [2021-06-05 03:54:44,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14732 states, 14731 states have (on average 2.5756567782227955) internal successors, (37942), 14731 states have internal predecessors, (37942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:44,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14732 states to 14732 states and 37942 transitions. [2021-06-05 03:54:44,605 INFO L78 Accepts]: Start accepts. Automaton has 14732 states and 37942 transitions. Word has length 59 [2021-06-05 03:54:44,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:44,605 INFO L482 AbstractCegarLoop]: Abstraction has 14732 states and 37942 transitions. [2021-06-05 03:54:44,605 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:44,605 INFO L276 IsEmpty]: Start isEmpty. Operand 14732 states and 37942 transitions. [2021-06-05 03:54:44,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 03:54:44,614 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:44,614 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:44,815 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable926,448 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:44,815 INFO L430 AbstractCegarLoop]: === Iteration 457 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:44,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:44,815 INFO L82 PathProgramCache]: Analyzing trace with hash -1617854181, now seen corresponding path program 269 times [2021-06-05 03:54:44,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:44,815 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871315445] [2021-06-05 03:54:44,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:44,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:44,894 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 20 proven. 154 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:54:44,894 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:44,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871315445] [2021-06-05 03:54:44,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871315445] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:44,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251394313] [2021-06-05 03:54:44,895 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 449 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 449 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:44,925 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-06-05 03:54:44,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:44,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 03:54:44,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:45,014 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 15 proven. 159 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:54:45,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251394313] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:45,014 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:45,014 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 03:54:45,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695671354] [2021-06-05 03:54:45,014 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 03:54:45,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:45,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 03:54:45,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:54:45,014 INFO L87 Difference]: Start difference. First operand 14732 states and 37942 transitions. Second operand has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:45,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:45,650 INFO L93 Difference]: Finished difference Result 15859 states and 40013 transitions. [2021-06-05 03:54:45,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 03:54:45,650 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 03:54:45,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:45,666 INFO L225 Difference]: With dead ends: 15859 [2021-06-05 03:54:45,666 INFO L226 Difference]: Without dead ends: 15767 [2021-06-05 03:54:45,666 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 134.9ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:54:45,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15767 states. [2021-06-05 03:54:45,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15767 to 14855. [2021-06-05 03:54:45,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14855 states, 14854 states have (on average 2.569341591490508) internal successors, (38165), 14854 states have internal predecessors, (38165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:45,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14855 states to 14855 states and 38165 transitions. [2021-06-05 03:54:45,872 INFO L78 Accepts]: Start accepts. Automaton has 14855 states and 38165 transitions. Word has length 59 [2021-06-05 03:54:45,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:45,872 INFO L482 AbstractCegarLoop]: Abstraction has 14855 states and 38165 transitions. [2021-06-05 03:54:45,872 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:45,872 INFO L276 IsEmpty]: Start isEmpty. Operand 14855 states and 38165 transitions. [2021-06-05 03:54:45,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 03:54:45,882 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:45,882 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:46,082 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable927,449 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:46,082 INFO L430 AbstractCegarLoop]: === Iteration 458 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:46,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:46,082 INFO L82 PathProgramCache]: Analyzing trace with hash 2063576935, now seen corresponding path program 270 times [2021-06-05 03:54:46,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:46,083 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037800595] [2021-06-05 03:54:46,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:46,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:46,183 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 155 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 03:54:46,183 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:46,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037800595] [2021-06-05 03:54:46,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037800595] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:46,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104216690] [2021-06-05 03:54:46,183 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 450 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 450 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:46,217 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-06-05 03:54:46,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:46,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 03:54:46,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:46,296 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 156 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 03:54:46,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104216690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:46,296 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:46,296 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 03:54:46,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575955786] [2021-06-05 03:54:46,297 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 03:54:46,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:46,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 03:54:46,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:54:46,297 INFO L87 Difference]: Start difference. First operand 14855 states and 38165 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:46,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:46,803 INFO L93 Difference]: Finished difference Result 16568 states and 41541 transitions. [2021-06-05 03:54:46,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 03:54:46,803 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 03:54:46,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:46,819 INFO L225 Difference]: With dead ends: 16568 [2021-06-05 03:54:46,820 INFO L226 Difference]: Without dead ends: 16556 [2021-06-05 03:54:46,820 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 150.5ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:54:46,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16556 states. [2021-06-05 03:54:46,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16556 to 14951. [2021-06-05 03:54:46,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14951 states, 14950 states have (on average 2.568561872909699) internal successors, (38400), 14950 states have internal predecessors, (38400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:47,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14951 states to 14951 states and 38400 transitions. [2021-06-05 03:54:47,011 INFO L78 Accepts]: Start accepts. Automaton has 14951 states and 38400 transitions. Word has length 59 [2021-06-05 03:54:47,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:47,012 INFO L482 AbstractCegarLoop]: Abstraction has 14951 states and 38400 transitions. [2021-06-05 03:54:47,012 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:47,012 INFO L276 IsEmpty]: Start isEmpty. Operand 14951 states and 38400 transitions. [2021-06-05 03:54:47,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 03:54:47,022 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:47,022 INFO L521 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:47,222 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable928,450 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:47,222 INFO L430 AbstractCegarLoop]: === Iteration 459 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:47,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:47,222 INFO L82 PathProgramCache]: Analyzing trace with hash 415219432, now seen corresponding path program 271 times [2021-06-05 03:54:47,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:47,223 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626129713] [2021-06-05 03:54:47,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:47,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:47,286 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 50 proven. 126 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:54:47,287 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:47,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626129713] [2021-06-05 03:54:47,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626129713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:47,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951420732] [2021-06-05 03:54:47,287 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 451 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 451 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:47,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:47,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 03:54:47,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:47,389 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 50 proven. 126 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:54:47,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951420732] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:47,389 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:47,389 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 03:54:47,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115291710] [2021-06-05 03:54:47,389 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 03:54:47,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:47,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 03:54:47,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:54:47,389 INFO L87 Difference]: Start difference. First operand 14951 states and 38400 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:47,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:47,563 INFO L93 Difference]: Finished difference Result 17530 states and 42981 transitions. [2021-06-05 03:54:47,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 03:54:47,563 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 03:54:47,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:47,580 INFO L225 Difference]: With dead ends: 17530 [2021-06-05 03:54:47,580 INFO L226 Difference]: Without dead ends: 17512 [2021-06-05 03:54:47,580 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 69.3ms TimeCoverageRelationStatistics Valid=80, Invalid=130, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:54:47,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17512 states. [2021-06-05 03:54:47,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17512 to 14926. [2021-06-05 03:54:47,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14926 states, 14925 states have (on average 2.5662311557788944) internal successors, (38301), 14925 states have internal predecessors, (38301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:47,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14926 states to 14926 states and 38301 transitions. [2021-06-05 03:54:47,763 INFO L78 Accepts]: Start accepts. Automaton has 14926 states and 38301 transitions. Word has length 59 [2021-06-05 03:54:47,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:47,763 INFO L482 AbstractCegarLoop]: Abstraction has 14926 states and 38301 transitions. [2021-06-05 03:54:47,763 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:47,763 INFO L276 IsEmpty]: Start isEmpty. Operand 14926 states and 38301 transitions. [2021-06-05 03:54:47,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 03:54:47,773 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:47,773 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:47,973 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable929,451 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:47,973 INFO L430 AbstractCegarLoop]: === Iteration 460 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:47,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:47,973 INFO L82 PathProgramCache]: Analyzing trace with hash -89473027, now seen corresponding path program 272 times [2021-06-05 03:54:47,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:47,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879558198] [2021-06-05 03:54:47,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:47,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:48,059 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 157 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:54:48,059 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:48,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879558198] [2021-06-05 03:54:48,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879558198] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:48,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46141580] [2021-06-05 03:54:48,059 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 452 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 452 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:48,086 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:54:48,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:48,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 03:54:48,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:48,165 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 158 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:54:48,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46141580] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:48,165 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:48,165 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 03:54:48,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213617364] [2021-06-05 03:54:48,165 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 03:54:48,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:48,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 03:54:48,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:54:48,166 INFO L87 Difference]: Start difference. First operand 14926 states and 38301 transitions. Second operand has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:48,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:48,830 INFO L93 Difference]: Finished difference Result 18642 states and 46055 transitions. [2021-06-05 03:54:48,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 03:54:48,831 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 03:54:48,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:48,849 INFO L225 Difference]: With dead ends: 18642 [2021-06-05 03:54:48,849 INFO L226 Difference]: Without dead ends: 18588 [2021-06-05 03:54:48,849 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 215.1ms TimeCoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2021-06-05 03:54:48,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18588 states. [2021-06-05 03:54:49,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18588 to 15189. [2021-06-05 03:54:49,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15189 states, 15188 states have (on average 2.568145904661575) internal successors, (39005), 15188 states have internal predecessors, (39005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:49,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15189 states to 15189 states and 39005 transitions. [2021-06-05 03:54:49,069 INFO L78 Accepts]: Start accepts. Automaton has 15189 states and 39005 transitions. Word has length 59 [2021-06-05 03:54:49,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:49,069 INFO L482 AbstractCegarLoop]: Abstraction has 15189 states and 39005 transitions. [2021-06-05 03:54:49,069 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:49,069 INFO L276 IsEmpty]: Start isEmpty. Operand 15189 states and 39005 transitions. [2021-06-05 03:54:49,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 03:54:49,079 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:49,079 INFO L521 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:49,279 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 452 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable932 [2021-06-05 03:54:49,279 INFO L430 AbstractCegarLoop]: === Iteration 461 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:49,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:49,279 INFO L82 PathProgramCache]: Analyzing trace with hash 1443086082, now seen corresponding path program 273 times [2021-06-05 03:54:49,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:49,279 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012940996] [2021-06-05 03:54:49,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:49,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:49,347 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 47 proven. 130 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:54:49,347 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:49,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012940996] [2021-06-05 03:54:49,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012940996] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:49,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013776746] [2021-06-05 03:54:49,348 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 453 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 453 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:49,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-06-05 03:54:49,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:49,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 03:54:49,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:49,454 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 47 proven. 130 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:54:49,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013776746] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:49,454 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:49,454 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-06-05 03:54:49,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510683713] [2021-06-05 03:54:49,454 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 03:54:49,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:49,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 03:54:49,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:54:49,455 INFO L87 Difference]: Start difference. First operand 15189 states and 39005 transitions. Second operand has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:49,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:49,674 INFO L93 Difference]: Finished difference Result 17831 states and 43702 transitions. [2021-06-05 03:54:49,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 03:54:49,674 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 03:54:49,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:49,691 INFO L225 Difference]: With dead ends: 17831 [2021-06-05 03:54:49,692 INFO L226 Difference]: Without dead ends: 17807 [2021-06-05 03:54:49,692 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 77.6ms TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:54:49,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17807 states. [2021-06-05 03:54:49,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17807 to 15189. [2021-06-05 03:54:49,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15189 states, 15188 states have (on average 2.5672241243086646) internal successors, (38991), 15188 states have internal predecessors, (38991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:49,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15189 states to 15189 states and 38991 transitions. [2021-06-05 03:54:49,883 INFO L78 Accepts]: Start accepts. Automaton has 15189 states and 38991 transitions. Word has length 59 [2021-06-05 03:54:49,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:49,883 INFO L482 AbstractCegarLoop]: Abstraction has 15189 states and 38991 transitions. [2021-06-05 03:54:49,883 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:49,883 INFO L276 IsEmpty]: Start isEmpty. Operand 15189 states and 38991 transitions. [2021-06-05 03:54:49,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 03:54:49,893 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:49,893 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:50,093 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable933,453 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:50,093 INFO L430 AbstractCegarLoop]: === Iteration 462 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:50,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:50,093 INFO L82 PathProgramCache]: Analyzing trace with hash 65363507, now seen corresponding path program 274 times [2021-06-05 03:54:50,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:50,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036548145] [2021-06-05 03:54:50,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:50,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:50,187 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 157 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:54:50,187 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:50,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036548145] [2021-06-05 03:54:50,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036548145] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:50,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798709119] [2021-06-05 03:54:50,187 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 454 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 454 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:50,213 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:54:50,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:50,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 03:54:50,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:50,291 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 158 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:54:50,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798709119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:50,291 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:50,291 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 03:54:50,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889827512] [2021-06-05 03:54:50,292 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:54:50,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:50,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:54:50,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:54:50,292 INFO L87 Difference]: Start difference. First operand 15189 states and 38991 transitions. Second operand has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:51,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:51,234 INFO L93 Difference]: Finished difference Result 23093 states and 55993 transitions. [2021-06-05 03:54:51,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 03:54:51,235 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 03:54:51,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:51,257 INFO L225 Difference]: With dead ends: 23093 [2021-06-05 03:54:51,257 INFO L226 Difference]: Without dead ends: 22913 [2021-06-05 03:54:51,258 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 376.1ms TimeCoverageRelationStatistics Valid=231, Invalid=1749, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 03:54:51,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22913 states. [2021-06-05 03:54:51,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22913 to 15680. [2021-06-05 03:54:51,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15680 states, 15679 states have (on average 2.568403597168187) internal successors, (40270), 15679 states have internal predecessors, (40270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:51,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15680 states to 15680 states and 40270 transitions. [2021-06-05 03:54:51,478 INFO L78 Accepts]: Start accepts. Automaton has 15680 states and 40270 transitions. Word has length 59 [2021-06-05 03:54:51,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:51,478 INFO L482 AbstractCegarLoop]: Abstraction has 15680 states and 40270 transitions. [2021-06-05 03:54:51,478 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:51,479 INFO L276 IsEmpty]: Start isEmpty. Operand 15680 states and 40270 transitions. [2021-06-05 03:54:51,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 03:54:51,488 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:51,488 INFO L521 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:51,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable937,454 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:51,688 INFO L430 AbstractCegarLoop]: === Iteration 463 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:51,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:51,688 INFO L82 PathProgramCache]: Analyzing trace with hash 451966184, now seen corresponding path program 275 times [2021-06-05 03:54:51,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:51,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387049285] [2021-06-05 03:54:51,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:51,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:51,766 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 45 proven. 132 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:54:51,766 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:51,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387049285] [2021-06-05 03:54:51,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387049285] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:51,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506963035] [2021-06-05 03:54:51,766 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 455 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 455 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:51,795 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-06-05 03:54:51,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:51,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 03:54:51,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:51,896 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 46 proven. 132 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:54:51,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506963035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:51,896 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:51,897 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 17 [2021-06-05 03:54:51,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003799667] [2021-06-05 03:54:51,897 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 03:54:51,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:51,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 03:54:51,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-06-05 03:54:51,897 INFO L87 Difference]: Start difference. First operand 15680 states and 40270 transitions. Second operand has 18 states, 18 states have (on average 4.388888888888889) internal successors, (79), 17 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:52,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:52,211 INFO L93 Difference]: Finished difference Result 18578 states and 45476 transitions. [2021-06-05 03:54:52,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 03:54:52,211 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.388888888888889) internal successors, (79), 17 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 03:54:52,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:52,227 INFO L225 Difference]: With dead ends: 18578 [2021-06-05 03:54:52,227 INFO L226 Difference]: Without dead ends: 18545 [2021-06-05 03:54:52,227 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 122.8ms TimeCoverageRelationStatistics Valid=127, Invalid=335, Unknown=0, NotChecked=0, Total=462 [2021-06-05 03:54:52,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18545 states. [2021-06-05 03:54:52,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18545 to 15680. [2021-06-05 03:54:52,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15680 states, 15679 states have (on average 2.567829580968174) internal successors, (40261), 15679 states have internal predecessors, (40261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:52,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15680 states to 15680 states and 40261 transitions. [2021-06-05 03:54:52,426 INFO L78 Accepts]: Start accepts. Automaton has 15680 states and 40261 transitions. Word has length 59 [2021-06-05 03:54:52,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:52,426 INFO L482 AbstractCegarLoop]: Abstraction has 15680 states and 40261 transitions. [2021-06-05 03:54:52,426 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.388888888888889) internal successors, (79), 17 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:52,426 INFO L276 IsEmpty]: Start isEmpty. Operand 15680 states and 40261 transitions. [2021-06-05 03:54:52,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 03:54:52,437 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:52,437 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:52,637 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable938,455 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:52,637 INFO L430 AbstractCegarLoop]: === Iteration 464 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:52,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:52,637 INFO L82 PathProgramCache]: Analyzing trace with hash 5671997, now seen corresponding path program 276 times [2021-06-05 03:54:52,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:52,638 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358521494] [2021-06-05 03:54:52,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:52,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:52,741 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 157 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:54:52,742 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:52,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358521494] [2021-06-05 03:54:52,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358521494] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:52,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842969715] [2021-06-05 03:54:52,742 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 456 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 456 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:52,772 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-06-05 03:54:52,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:52,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 03:54:52,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:52,848 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 158 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:54:52,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842969715] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:52,848 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:52,848 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 03:54:52,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142405238] [2021-06-05 03:54:52,849 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 03:54:52,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:52,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 03:54:52,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:54:52,849 INFO L87 Difference]: Start difference. First operand 15680 states and 40261 transitions. Second operand has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:54,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:54,154 INFO L93 Difference]: Finished difference Result 28722 states and 68889 transitions. [2021-06-05 03:54:54,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-05 03:54:54,155 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 03:54:54,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:54,187 INFO L225 Difference]: With dead ends: 28722 [2021-06-05 03:54:54,187 INFO L226 Difference]: Without dead ends: 28446 [2021-06-05 03:54:54,188 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1479 ImplicationChecksByTransitivity, 666.8ms TimeCoverageRelationStatistics Valid=501, Invalid=4191, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 03:54:54,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28446 states. [2021-06-05 03:54:54,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28446 to 16072. [2021-06-05 03:54:54,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16072 states, 16071 states have (on average 2.5689129487897455) internal successors, (41285), 16071 states have internal predecessors, (41285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:54,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16072 states to 16072 states and 41285 transitions. [2021-06-05 03:54:54,452 INFO L78 Accepts]: Start accepts. Automaton has 16072 states and 41285 transitions. Word has length 59 [2021-06-05 03:54:54,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:54,453 INFO L482 AbstractCegarLoop]: Abstraction has 16072 states and 41285 transitions. [2021-06-05 03:54:54,453 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:54,453 INFO L276 IsEmpty]: Start isEmpty. Operand 16072 states and 41285 transitions. [2021-06-05 03:54:54,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 03:54:54,463 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:54,463 INFO L521 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:54,663 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 456 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable943 [2021-06-05 03:54:54,663 INFO L430 AbstractCegarLoop]: === Iteration 465 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:54,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:54,663 INFO L82 PathProgramCache]: Analyzing trace with hash 1899244866, now seen corresponding path program 277 times [2021-06-05 03:54:54,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:54,664 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232925373] [2021-06-05 03:54:54,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:54,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:54,750 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 49 proven. 128 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:54:54,750 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:54,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232925373] [2021-06-05 03:54:54,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232925373] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:54,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769584742] [2021-06-05 03:54:54,750 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 457 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 457 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:54,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:54,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 03:54:54,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:54,855 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 49 proven. 128 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:54:54,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769584742] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:54,855 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:54,855 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-06-05 03:54:54,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243337300] [2021-06-05 03:54:54,855 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 03:54:54,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:54,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 03:54:54,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:54:54,856 INFO L87 Difference]: Start difference. First operand 16072 states and 41285 transitions. Second operand has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:55,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:55,129 INFO L93 Difference]: Finished difference Result 18886 states and 46305 transitions. [2021-06-05 03:54:55,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 03:54:55,130 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 03:54:55,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:55,150 INFO L225 Difference]: With dead ends: 18886 [2021-06-05 03:54:55,151 INFO L226 Difference]: Without dead ends: 18844 [2021-06-05 03:54:55,151 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 114.0ms TimeCoverageRelationStatistics Valid=119, Invalid=261, Unknown=0, NotChecked=0, Total=380 [2021-06-05 03:54:55,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18844 states. [2021-06-05 03:54:55,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18844 to 15745. [2021-06-05 03:54:55,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15745 states, 15744 states have (on average 2.5645960365853657) internal successors, (40377), 15744 states have internal predecessors, (40377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:55,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15745 states to 15745 states and 40377 transitions. [2021-06-05 03:54:55,389 INFO L78 Accepts]: Start accepts. Automaton has 15745 states and 40377 transitions. Word has length 59 [2021-06-05 03:54:55,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:55,389 INFO L482 AbstractCegarLoop]: Abstraction has 15745 states and 40377 transitions. [2021-06-05 03:54:55,389 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:55,389 INFO L276 IsEmpty]: Start isEmpty. Operand 15745 states and 40377 transitions. [2021-06-05 03:54:55,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 03:54:55,399 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:55,399 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:55,599 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 457 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable944 [2021-06-05 03:54:55,599 INFO L430 AbstractCegarLoop]: === Iteration 466 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:55,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:55,600 INFO L82 PathProgramCache]: Analyzing trace with hash -147641869, now seen corresponding path program 278 times [2021-06-05 03:54:55,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:55,600 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752532840] [2021-06-05 03:54:55,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:55,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:55,714 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 160 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:54:55,714 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:55,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752532840] [2021-06-05 03:54:55,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752532840] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:55,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851148924] [2021-06-05 03:54:55,714 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 458 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 458 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:55,741 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:54:55,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:55,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 03:54:55,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:55,817 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 160 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:54:55,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851148924] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:55,817 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:55,817 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 03:54:55,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523566211] [2021-06-05 03:54:55,817 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:54:55,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:55,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:54:55,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:54:55,818 INFO L87 Difference]: Start difference. First operand 15745 states and 40377 transitions. Second operand has 16 states, 16 states have (on average 3.75) internal successors, (60), 15 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:56,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:56,569 INFO L93 Difference]: Finished difference Result 22153 states and 53662 transitions. [2021-06-05 03:54:56,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 03:54:56,570 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.75) internal successors, (60), 15 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 03:54:56,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:56,592 INFO L225 Difference]: With dead ends: 22153 [2021-06-05 03:54:56,592 INFO L226 Difference]: Without dead ends: 21775 [2021-06-05 03:54:56,593 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 281.2ms TimeCoverageRelationStatistics Valid=144, Invalid=848, Unknown=0, NotChecked=0, Total=992 [2021-06-05 03:54:56,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21775 states. [2021-06-05 03:54:56,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21775 to 14506. [2021-06-05 03:54:56,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14506 states, 14505 states have (on average 2.5544295070665286) internal successors, (37052), 14505 states have internal predecessors, (37052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:56,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14506 states to 14506 states and 37052 transitions. [2021-06-05 03:54:56,797 INFO L78 Accepts]: Start accepts. Automaton has 14506 states and 37052 transitions. Word has length 59 [2021-06-05 03:54:56,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:56,797 INFO L482 AbstractCegarLoop]: Abstraction has 14506 states and 37052 transitions. [2021-06-05 03:54:56,797 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.75) internal successors, (60), 15 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:56,797 INFO L276 IsEmpty]: Start isEmpty. Operand 14506 states and 37052 transitions. [2021-06-05 03:54:56,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 03:54:56,806 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:56,806 INFO L521 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:57,007 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 458 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable950 [2021-06-05 03:54:57,007 INFO L430 AbstractCegarLoop]: === Iteration 467 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:57,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:57,007 INFO L82 PathProgramCache]: Analyzing trace with hash -385703386, now seen corresponding path program 130 times [2021-06-05 03:54:57,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:57,007 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028138249] [2021-06-05 03:54:57,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:57,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:57,067 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 138 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:54:57,067 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:57,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028138249] [2021-06-05 03:54:57,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028138249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:57,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856318231] [2021-06-05 03:54:57,067 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 459 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 459 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:57,093 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:54:57,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:57,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 03:54:57,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:57,173 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 139 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:57,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856318231] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:57,173 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:57,173 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 12 [2021-06-05 03:54:57,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405776930] [2021-06-05 03:54:57,173 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 03:54:57,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:57,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 03:54:57,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=91, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:54:57,173 INFO L87 Difference]: Start difference. First operand 14506 states and 37052 transitions. Second operand has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:57,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:57,372 INFO L93 Difference]: Finished difference Result 18216 states and 44603 transitions. [2021-06-05 03:54:57,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 03:54:57,373 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 03:54:57,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:57,391 INFO L225 Difference]: With dead ends: 18216 [2021-06-05 03:54:57,391 INFO L226 Difference]: Without dead ends: 18202 [2021-06-05 03:54:57,391 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 66.0ms TimeCoverageRelationStatistics Valid=85, Invalid=125, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:54:57,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18202 states. [2021-06-05 03:54:57,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18202 to 14941. [2021-06-05 03:54:57,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14941 states, 14940 states have (on average 2.5593038821954486) internal successors, (38236), 14940 states have internal predecessors, (38236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:57,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14941 states to 14941 states and 38236 transitions. [2021-06-05 03:54:57,580 INFO L78 Accepts]: Start accepts. Automaton has 14941 states and 38236 transitions. Word has length 59 [2021-06-05 03:54:57,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:57,580 INFO L482 AbstractCegarLoop]: Abstraction has 14941 states and 38236 transitions. [2021-06-05 03:54:57,580 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:57,580 INFO L276 IsEmpty]: Start isEmpty. Operand 14941 states and 38236 transitions. [2021-06-05 03:54:57,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 03:54:57,589 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:57,589 INFO L521 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:57,790 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable951,459 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:57,790 INFO L430 AbstractCegarLoop]: === Iteration 468 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:57,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:57,790 INFO L82 PathProgramCache]: Analyzing trace with hash -1007583796, now seen corresponding path program 131 times [2021-06-05 03:54:57,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:57,790 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756939892] [2021-06-05 03:54:57,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:57,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:57,851 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 138 proven. 39 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:54:57,851 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:57,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756939892] [2021-06-05 03:54:57,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756939892] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:57,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062928335] [2021-06-05 03:54:57,851 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 460 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 460 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:57,883 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-06-05 03:54:57,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:57,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 03:54:57,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:57,977 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 139 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:54:57,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062928335] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:57,977 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:57,977 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 14 [2021-06-05 03:54:57,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385943400] [2021-06-05 03:54:57,977 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 03:54:57,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:57,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 03:54:57,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=123, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:54:57,977 INFO L87 Difference]: Start difference. First operand 14941 states and 38236 transitions. Second operand has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:58,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:58,241 INFO L93 Difference]: Finished difference Result 23419 states and 56616 transitions. [2021-06-05 03:54:58,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 03:54:58,241 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 03:54:58,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:58,265 INFO L225 Difference]: With dead ends: 23419 [2021-06-05 03:54:58,266 INFO L226 Difference]: Without dead ends: 23419 [2021-06-05 03:54:58,266 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 102.9ms TimeCoverageRelationStatistics Valid=162, Invalid=218, Unknown=0, NotChecked=0, Total=380 [2021-06-05 03:54:58,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23419 states. [2021-06-05 03:54:58,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23419 to 14952. [2021-06-05 03:54:58,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14952 states, 14951 states have (on average 2.5596281185205) internal successors, (38269), 14951 states have internal predecessors, (38269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:58,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14952 states to 14952 states and 38269 transitions. [2021-06-05 03:54:58,515 INFO L78 Accepts]: Start accepts. Automaton has 14952 states and 38269 transitions. Word has length 59 [2021-06-05 03:54:58,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:58,515 INFO L482 AbstractCegarLoop]: Abstraction has 14952 states and 38269 transitions. [2021-06-05 03:54:58,515 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:58,515 INFO L276 IsEmpty]: Start isEmpty. Operand 14952 states and 38269 transitions. [2021-06-05 03:54:58,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 03:54:58,524 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:58,524 INFO L521 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:58,724 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable953,460 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:58,724 INFO L430 AbstractCegarLoop]: === Iteration 469 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:58,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:58,725 INFO L82 PathProgramCache]: Analyzing trace with hash 1649811044, now seen corresponding path program 132 times [2021-06-05 03:54:58,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:58,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125104102] [2021-06-05 03:54:58,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:58,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:58,795 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 136 proven. 41 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:54:58,795 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:58,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125104102] [2021-06-05 03:54:58,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125104102] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:58,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367039937] [2021-06-05 03:54:58,795 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 461 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 461 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:58,826 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-06-05 03:54:58,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:58,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 03:54:58,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:58,909 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 137 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:54:58,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367039937] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:58,910 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:58,910 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2021-06-05 03:54:58,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391112508] [2021-06-05 03:54:58,910 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:54:58,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:58,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:54:58,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:54:58,910 INFO L87 Difference]: Start difference. First operand 14952 states and 38269 transitions. Second operand has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:59,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:59,238 INFO L93 Difference]: Finished difference Result 25599 states and 61804 transitions. [2021-06-05 03:54:59,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 03:54:59,238 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 03:54:59,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:59,266 INFO L225 Difference]: With dead ends: 25599 [2021-06-05 03:54:59,266 INFO L226 Difference]: Without dead ends: 25599 [2021-06-05 03:54:59,266 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 131.5ms TimeCoverageRelationStatistics Valid=203, Invalid=303, Unknown=0, NotChecked=0, Total=506 [2021-06-05 03:54:59,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25599 states. [2021-06-05 03:54:59,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25599 to 14991. [2021-06-05 03:54:59,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14991 states, 14990 states have (on average 2.561307538358906) internal successors, (38394), 14990 states have internal predecessors, (38394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:59,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14991 states to 14991 states and 38394 transitions. [2021-06-05 03:54:59,490 INFO L78 Accepts]: Start accepts. Automaton has 14991 states and 38394 transitions. Word has length 59 [2021-06-05 03:54:59,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:59,490 INFO L482 AbstractCegarLoop]: Abstraction has 14991 states and 38394 transitions. [2021-06-05 03:54:59,490 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:59,490 INFO L276 IsEmpty]: Start isEmpty. Operand 14991 states and 38394 transitions. [2021-06-05 03:54:59,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 03:54:59,500 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:59,500 INFO L521 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:59,700 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 461 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable954 [2021-06-05 03:54:59,700 INFO L430 AbstractCegarLoop]: === Iteration 470 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:59,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:59,701 INFO L82 PathProgramCache]: Analyzing trace with hash -40184120, now seen corresponding path program 133 times [2021-06-05 03:54:59,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:59,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287434208] [2021-06-05 03:54:59,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:59,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:59,780 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 126 proven. 51 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:54:59,780 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:59,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287434208] [2021-06-05 03:54:59,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287434208] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:59,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847023291] [2021-06-05 03:54:59,780 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 462 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 462 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:59,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:59,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 03:54:59,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:59,889 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 127 proven. 51 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:54:59,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847023291] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:59,890 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:59,890 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 14 [2021-06-05 03:54:59,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759276966] [2021-06-05 03:54:59,890 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 03:54:59,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:59,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 03:54:59,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:54:59,890 INFO L87 Difference]: Start difference. First operand 14991 states and 38394 transitions. Second operand has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:00,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:00,224 INFO L93 Difference]: Finished difference Result 25335 states and 61221 transitions. [2021-06-05 03:55:00,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 03:55:00,225 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 03:55:00,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:00,253 INFO L225 Difference]: With dead ends: 25335 [2021-06-05 03:55:00,253 INFO L226 Difference]: Without dead ends: 25335 [2021-06-05 03:55:00,254 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 161.0ms TimeCoverageRelationStatistics Valid=254, Invalid=396, Unknown=0, NotChecked=0, Total=650 [2021-06-05 03:55:00,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25335 states. [2021-06-05 03:55:00,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25335 to 15025. [2021-06-05 03:55:00,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15025 states, 15024 states have (on average 2.562433439829606) internal successors, (38498), 15024 states have internal predecessors, (38498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:00,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15025 states to 15025 states and 38498 transitions. [2021-06-05 03:55:00,484 INFO L78 Accepts]: Start accepts. Automaton has 15025 states and 38498 transitions. Word has length 59 [2021-06-05 03:55:00,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:00,484 INFO L482 AbstractCegarLoop]: Abstraction has 15025 states and 38498 transitions. [2021-06-05 03:55:00,484 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:00,484 INFO L276 IsEmpty]: Start isEmpty. Operand 15025 states and 38498 transitions. [2021-06-05 03:55:00,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 03:55:00,495 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:00,495 INFO L521 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:00,695 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 462 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable955 [2021-06-05 03:55:00,695 INFO L430 AbstractCegarLoop]: === Iteration 471 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:00,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:00,695 INFO L82 PathProgramCache]: Analyzing trace with hash -1079471132, now seen corresponding path program 134 times [2021-06-05 03:55:00,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:00,695 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689027866] [2021-06-05 03:55:00,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:00,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:00,785 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 116 proven. 61 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:55:00,785 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:00,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689027866] [2021-06-05 03:55:00,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689027866] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:00,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146274378] [2021-06-05 03:55:00,785 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 463 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 463 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:00,811 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:55:00,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:00,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 03:55:00,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:00,896 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 117 proven. 61 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:55:00,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146274378] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:00,897 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:00,897 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 15 [2021-06-05 03:55:00,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255786088] [2021-06-05 03:55:00,897 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:55:00,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:00,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:55:00,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:55:00,897 INFO L87 Difference]: Start difference. First operand 15025 states and 38498 transitions. Second operand has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:01,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:01,297 INFO L93 Difference]: Finished difference Result 22714 states and 55093 transitions. [2021-06-05 03:55:01,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 03:55:01,297 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 03:55:01,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:01,321 INFO L225 Difference]: With dead ends: 22714 [2021-06-05 03:55:01,321 INFO L226 Difference]: Without dead ends: 22714 [2021-06-05 03:55:01,322 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 176.0ms TimeCoverageRelationStatistics Valid=268, Invalid=434, Unknown=0, NotChecked=0, Total=702 [2021-06-05 03:55:01,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22714 states. [2021-06-05 03:55:01,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22714 to 15046. [2021-06-05 03:55:01,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15046 states, 15045 states have (on average 2.5626453971419076) internal successors, (38555), 15045 states have internal predecessors, (38555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:01,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15046 states to 15046 states and 38555 transitions. [2021-06-05 03:55:01,570 INFO L78 Accepts]: Start accepts. Automaton has 15046 states and 38555 transitions. Word has length 59 [2021-06-05 03:55:01,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:01,570 INFO L482 AbstractCegarLoop]: Abstraction has 15046 states and 38555 transitions. [2021-06-05 03:55:01,570 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:01,570 INFO L276 IsEmpty]: Start isEmpty. Operand 15046 states and 38555 transitions. [2021-06-05 03:55:01,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 03:55:01,580 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:01,580 INFO L521 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:01,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable956,463 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:01,780 INFO L430 AbstractCegarLoop]: === Iteration 472 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:01,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:01,781 INFO L82 PathProgramCache]: Analyzing trace with hash -59608760, now seen corresponding path program 135 times [2021-06-05 03:55:01,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:01,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312138828] [2021-06-05 03:55:01,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:01,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:01,891 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 106 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:55:01,892 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:01,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312138828] [2021-06-05 03:55:01,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312138828] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:01,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959132977] [2021-06-05 03:55:01,892 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 464 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 464 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:01,923 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-06-05 03:55:01,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:01,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 03:55:01,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:02,016 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 107 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:02,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959132977] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:02,016 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:02,016 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 16 [2021-06-05 03:55:02,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860424556] [2021-06-05 03:55:02,016 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 03:55:02,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:02,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 03:55:02,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:55:02,016 INFO L87 Difference]: Start difference. First operand 15046 states and 38555 transitions. Second operand has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 16 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:02,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:02,361 INFO L93 Difference]: Finished difference Result 18929 states and 46502 transitions. [2021-06-05 03:55:02,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 03:55:02,361 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 16 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 03:55:02,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:02,380 INFO L225 Difference]: With dead ends: 18929 [2021-06-05 03:55:02,380 INFO L226 Difference]: Without dead ends: 18929 [2021-06-05 03:55:02,380 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 183.5ms TimeCoverageRelationStatistics Valid=236, Invalid=414, Unknown=0, NotChecked=0, Total=650 [2021-06-05 03:55:02,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18929 states. [2021-06-05 03:55:02,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18929 to 14402. [2021-06-05 03:55:02,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14402 states, 14401 states have (on average 2.552669953475453) internal successors, (36761), 14401 states have internal predecessors, (36761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:02,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14402 states to 14402 states and 36761 transitions. [2021-06-05 03:55:02,568 INFO L78 Accepts]: Start accepts. Automaton has 14402 states and 36761 transitions. Word has length 59 [2021-06-05 03:55:02,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:02,568 INFO L482 AbstractCegarLoop]: Abstraction has 14402 states and 36761 transitions. [2021-06-05 03:55:02,568 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 16 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:02,568 INFO L276 IsEmpty]: Start isEmpty. Operand 14402 states and 36761 transitions. [2021-06-05 03:55:02,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 03:55:02,577 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:02,577 INFO L521 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:02,777 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 464 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable957 [2021-06-05 03:55:02,777 INFO L430 AbstractCegarLoop]: === Iteration 473 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:02,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:02,778 INFO L82 PathProgramCache]: Analyzing trace with hash 601775784, now seen corresponding path program 279 times [2021-06-05 03:55:02,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:02,778 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392666712] [2021-06-05 03:55:02,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:02,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:02,874 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 60 proven. 118 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:55:02,874 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:02,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392666712] [2021-06-05 03:55:02,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392666712] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:02,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839434892] [2021-06-05 03:55:02,875 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 465 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 465 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:02,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 03:55:02,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:02,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 03:55:02,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:02,984 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 60 proven. 118 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:55:02,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839434892] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:02,985 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:02,985 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-06-05 03:55:02,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103841487] [2021-06-05 03:55:02,985 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:55:02,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:02,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:55:02,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:55:02,985 INFO L87 Difference]: Start difference. First operand 14402 states and 36761 transitions. Second operand has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:03,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:03,250 INFO L93 Difference]: Finished difference Result 16717 states and 40878 transitions. [2021-06-05 03:55:03,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 03:55:03,250 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 03:55:03,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:03,267 INFO L225 Difference]: With dead ends: 16717 [2021-06-05 03:55:03,268 INFO L226 Difference]: Without dead ends: 16672 [2021-06-05 03:55:03,268 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 133.8ms TimeCoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2021-06-05 03:55:03,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16672 states. [2021-06-05 03:55:03,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16672 to 14402. [2021-06-05 03:55:03,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14402 states, 14401 states have (on average 2.552044996875217) internal successors, (36752), 14401 states have internal predecessors, (36752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:03,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14402 states to 14402 states and 36752 transitions. [2021-06-05 03:55:03,457 INFO L78 Accepts]: Start accepts. Automaton has 14402 states and 36752 transitions. Word has length 59 [2021-06-05 03:55:03,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:03,457 INFO L482 AbstractCegarLoop]: Abstraction has 14402 states and 36752 transitions. [2021-06-05 03:55:03,457 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:03,457 INFO L276 IsEmpty]: Start isEmpty. Operand 14402 states and 36752 transitions. [2021-06-05 03:55:03,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 03:55:03,466 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:03,466 INFO L521 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:03,667 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable958,465 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:03,667 INFO L430 AbstractCegarLoop]: === Iteration 474 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:03,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:03,667 INFO L82 PathProgramCache]: Analyzing trace with hash 972677468, now seen corresponding path program 280 times [2021-06-05 03:55:03,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:03,667 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567372578] [2021-06-05 03:55:03,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:03,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:03,721 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 66 proven. 108 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 03:55:03,721 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:03,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567372578] [2021-06-05 03:55:03,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567372578] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:03,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177807980] [2021-06-05 03:55:03,722 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 466 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 466 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:03,747 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:55:03,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:03,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 03:55:03,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:03,822 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 66 proven. 108 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 03:55:03,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177807980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:03,822 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:03,822 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 03:55:03,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548105697] [2021-06-05 03:55:03,822 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 03:55:03,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:03,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 03:55:03,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-06-05 03:55:03,823 INFO L87 Difference]: Start difference. First operand 14402 states and 36752 transitions. Second operand has 11 states, 11 states have (on average 5.0) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:03,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:03,984 INFO L93 Difference]: Finished difference Result 17320 states and 42003 transitions. [2021-06-05 03:55:03,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 03:55:03,985 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 03:55:03,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:04,003 INFO L225 Difference]: With dead ends: 17320 [2021-06-05 03:55:04,003 INFO L226 Difference]: Without dead ends: 17317 [2021-06-05 03:55:04,003 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 49.1ms TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:55:04,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17317 states. [2021-06-05 03:55:04,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17317 to 14390. [2021-06-05 03:55:04,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14390 states, 14389 states have (on average 2.5509069428035303) internal successors, (36705), 14389 states have internal predecessors, (36705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:04,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14390 states to 14390 states and 36705 transitions. [2021-06-05 03:55:04,257 INFO L78 Accepts]: Start accepts. Automaton has 14390 states and 36705 transitions. Word has length 59 [2021-06-05 03:55:04,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:04,257 INFO L482 AbstractCegarLoop]: Abstraction has 14390 states and 36705 transitions. [2021-06-05 03:55:04,257 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:04,257 INFO L276 IsEmpty]: Start isEmpty. Operand 14390 states and 36705 transitions. [2021-06-05 03:55:04,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 03:55:04,266 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:04,266 INFO L521 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:04,466 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 466 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable965 [2021-06-05 03:55:04,466 INFO L430 AbstractCegarLoop]: === Iteration 475 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:04,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:04,467 INFO L82 PathProgramCache]: Analyzing trace with hash 1179740034, now seen corresponding path program 281 times [2021-06-05 03:55:04,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:04,467 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598673014] [2021-06-05 03:55:04,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:04,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:04,528 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 59 proven. 115 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 03:55:04,529 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:04,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598673014] [2021-06-05 03:55:04,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598673014] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:04,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027411852] [2021-06-05 03:55:04,529 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 467 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 467 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:04,559 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-06-05 03:55:04,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:04,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 03:55:04,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:04,650 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 63 proven. 115 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:55:04,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027411852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:04,650 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:04,650 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 14 [2021-06-05 03:55:04,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460195542] [2021-06-05 03:55:04,651 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 03:55:04,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:04,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 03:55:04,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:55:04,651 INFO L87 Difference]: Start difference. First operand 14390 states and 36705 transitions. Second operand has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:04,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:04,899 INFO L93 Difference]: Finished difference Result 17479 states and 42286 transitions. [2021-06-05 03:55:04,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 03:55:04,900 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 03:55:04,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:04,917 INFO L225 Difference]: With dead ends: 17479 [2021-06-05 03:55:04,917 INFO L226 Difference]: Without dead ends: 17461 [2021-06-05 03:55:04,917 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 89.5ms TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2021-06-05 03:55:04,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17461 states. [2021-06-05 03:55:05,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17461 to 14390. [2021-06-05 03:55:05,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14390 states, 14389 states have (on average 2.549308499548266) internal successors, (36682), 14389 states have internal predecessors, (36682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:05,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14390 states to 14390 states and 36682 transitions. [2021-06-05 03:55:05,097 INFO L78 Accepts]: Start accepts. Automaton has 14390 states and 36682 transitions. Word has length 59 [2021-06-05 03:55:05,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:05,098 INFO L482 AbstractCegarLoop]: Abstraction has 14390 states and 36682 transitions. [2021-06-05 03:55:05,098 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:05,098 INFO L276 IsEmpty]: Start isEmpty. Operand 14390 states and 36682 transitions. [2021-06-05 03:55:05,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 03:55:05,107 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:05,107 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:05,307 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable967,467 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:05,307 INFO L430 AbstractCegarLoop]: === Iteration 476 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:05,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:05,307 INFO L82 PathProgramCache]: Analyzing trace with hash -268259979, now seen corresponding path program 282 times [2021-06-05 03:55:05,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:05,307 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232960724] [2021-06-05 03:55:05,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:05,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:05,389 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 20 proven. 154 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:55:05,389 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:05,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232960724] [2021-06-05 03:55:05,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232960724] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:05,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226801127] [2021-06-05 03:55:05,389 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 468 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 468 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:05,421 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-06-05 03:55:05,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:05,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 03:55:05,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:05,502 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 15 proven. 159 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:55:05,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226801127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:05,503 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:05,503 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 03:55:05,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586553699] [2021-06-05 03:55:05,503 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 03:55:05,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:05,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 03:55:05,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:55:05,503 INFO L87 Difference]: Start difference. First operand 14390 states and 36682 transitions. Second operand has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:06,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:06,223 INFO L93 Difference]: Finished difference Result 16064 states and 39766 transitions. [2021-06-05 03:55:06,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 03:55:06,224 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 03:55:06,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:06,240 INFO L225 Difference]: With dead ends: 16064 [2021-06-05 03:55:06,240 INFO L226 Difference]: Without dead ends: 15797 [2021-06-05 03:55:06,240 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 136.6ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:55:06,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15797 states. [2021-06-05 03:55:06,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15797 to 14403. [2021-06-05 03:55:06,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14403 states, 14402 states have (on average 2.540411054020275) internal successors, (36587), 14402 states have internal predecessors, (36587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:06,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14403 states to 14403 states and 36587 transitions. [2021-06-05 03:55:06,411 INFO L78 Accepts]: Start accepts. Automaton has 14403 states and 36587 transitions. Word has length 59 [2021-06-05 03:55:06,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:06,411 INFO L482 AbstractCegarLoop]: Abstraction has 14403 states and 36587 transitions. [2021-06-05 03:55:06,411 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:06,411 INFO L276 IsEmpty]: Start isEmpty. Operand 14403 states and 36587 transitions. [2021-06-05 03:55:06,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 03:55:06,420 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:06,420 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:06,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 468 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable970 [2021-06-05 03:55:06,620 INFO L430 AbstractCegarLoop]: === Iteration 477 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:06,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:06,621 INFO L82 PathProgramCache]: Analyzing trace with hash -881796159, now seen corresponding path program 283 times [2021-06-05 03:55:06,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:06,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718979811] [2021-06-05 03:55:06,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:06,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:06,709 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 155 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 03:55:06,709 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:06,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718979811] [2021-06-05 03:55:06,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718979811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:06,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729690316] [2021-06-05 03:55:06,709 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 469 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 469 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:06,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:06,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 03:55:06,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:06,816 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 156 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 03:55:06,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729690316] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:06,816 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:06,816 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 03:55:06,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284899041] [2021-06-05 03:55:06,816 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 03:55:06,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:06,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 03:55:06,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:55:06,816 INFO L87 Difference]: Start difference. First operand 14403 states and 36587 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:07,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:07,335 INFO L93 Difference]: Finished difference Result 16239 states and 40254 transitions. [2021-06-05 03:55:07,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 03:55:07,336 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 03:55:07,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:07,352 INFO L225 Difference]: With dead ends: 16239 [2021-06-05 03:55:07,353 INFO L226 Difference]: Without dead ends: 16227 [2021-06-05 03:55:07,353 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 138.3ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:55:07,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16227 states. [2021-06-05 03:55:07,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16227 to 14558. [2021-06-05 03:55:07,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14558 states, 14557 states have (on average 2.540221199422958) internal successors, (36978), 14557 states have internal predecessors, (36978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:07,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14558 states to 14558 states and 36978 transitions. [2021-06-05 03:55:07,587 INFO L78 Accepts]: Start accepts. Automaton has 14558 states and 36978 transitions. Word has length 59 [2021-06-05 03:55:07,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:07,587 INFO L482 AbstractCegarLoop]: Abstraction has 14558 states and 36978 transitions. [2021-06-05 03:55:07,587 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:07,587 INFO L276 IsEmpty]: Start isEmpty. Operand 14558 states and 36978 transitions. [2021-06-05 03:55:07,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 03:55:07,596 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:07,596 INFO L521 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:07,797 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable971,469 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:07,797 INFO L430 AbstractCegarLoop]: === Iteration 478 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:07,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:07,797 INFO L82 PathProgramCache]: Analyzing trace with hash -1039095646, now seen corresponding path program 136 times [2021-06-05 03:55:07,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:07,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44804005] [2021-06-05 03:55:07,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:07,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:07,859 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 115 proven. 62 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:55:07,860 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:07,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44804005] [2021-06-05 03:55:07,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44804005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:07,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899363096] [2021-06-05 03:55:07,860 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 470 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 470 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:07,887 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:55:07,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:07,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 03:55:07,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:07,969 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 117 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:07,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899363096] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:07,969 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:07,969 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 12 [2021-06-05 03:55:07,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991953084] [2021-06-05 03:55:07,969 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 03:55:07,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:07,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 03:55:07,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:55:07,969 INFO L87 Difference]: Start difference. First operand 14558 states and 36978 transitions. Second operand has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:08,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:08,170 INFO L93 Difference]: Finished difference Result 17769 states and 43570 transitions. [2021-06-05 03:55:08,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 03:55:08,170 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 03:55:08,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:08,189 INFO L225 Difference]: With dead ends: 17769 [2021-06-05 03:55:08,189 INFO L226 Difference]: Without dead ends: 17739 [2021-06-05 03:55:08,189 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 75.6ms TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:55:08,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17739 states. [2021-06-05 03:55:08,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17739 to 15059. [2021-06-05 03:55:08,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15059 states, 15058 states have (on average 2.5455571789082216) internal successors, (38331), 15058 states have internal predecessors, (38331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:08,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15059 states to 15059 states and 38331 transitions. [2021-06-05 03:55:08,385 INFO L78 Accepts]: Start accepts. Automaton has 15059 states and 38331 transitions. Word has length 59 [2021-06-05 03:55:08,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:08,385 INFO L482 AbstractCegarLoop]: Abstraction has 15059 states and 38331 transitions. [2021-06-05 03:55:08,385 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:08,385 INFO L276 IsEmpty]: Start isEmpty. Operand 15059 states and 38331 transitions. [2021-06-05 03:55:08,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 03:55:08,395 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:08,395 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:08,595 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 470 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable972 [2021-06-05 03:55:08,595 INFO L430 AbstractCegarLoop]: === Iteration 479 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:08,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:08,595 INFO L82 PathProgramCache]: Analyzing trace with hash 1260121175, now seen corresponding path program 284 times [2021-06-05 03:55:08,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:08,595 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578080833] [2021-06-05 03:55:08,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:08,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:08,680 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 157 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:55:08,680 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:08,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578080833] [2021-06-05 03:55:08,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578080833] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:08,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314521959] [2021-06-05 03:55:08,680 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 471 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 471 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:08,706 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:55:08,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:08,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 03:55:08,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:08,785 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 158 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:55:08,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314521959] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:08,786 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:08,786 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 03:55:08,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248409450] [2021-06-05 03:55:08,786 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 03:55:08,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:08,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 03:55:08,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:55:08,786 INFO L87 Difference]: Start difference. First operand 15059 states and 38331 transitions. Second operand has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:09,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:09,488 INFO L93 Difference]: Finished difference Result 19111 states and 46968 transitions. [2021-06-05 03:55:09,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 03:55:09,488 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 03:55:09,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:09,508 INFO L225 Difference]: With dead ends: 19111 [2021-06-05 03:55:09,508 INFO L226 Difference]: Without dead ends: 19057 [2021-06-05 03:55:09,508 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 232.2ms TimeCoverageRelationStatistics Valid=117, Invalid=813, Unknown=0, NotChecked=0, Total=930 [2021-06-05 03:55:09,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19057 states. [2021-06-05 03:55:09,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19057 to 15532. [2021-06-05 03:55:09,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15532 states, 15531 states have (on average 2.551155753010109) internal successors, (39622), 15531 states have internal predecessors, (39622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:09,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15532 states to 15532 states and 39622 transitions. [2021-06-05 03:55:09,715 INFO L78 Accepts]: Start accepts. Automaton has 15532 states and 39622 transitions. Word has length 59 [2021-06-05 03:55:09,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:09,715 INFO L482 AbstractCegarLoop]: Abstraction has 15532 states and 39622 transitions. [2021-06-05 03:55:09,715 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:09,715 INFO L276 IsEmpty]: Start isEmpty. Operand 15532 states and 39622 transitions. [2021-06-05 03:55:09,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 03:55:09,725 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:09,725 INFO L521 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:09,925 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 471 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable975 [2021-06-05 03:55:09,925 INFO L430 AbstractCegarLoop]: === Iteration 480 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:09,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:09,925 INFO L82 PathProgramCache]: Analyzing trace with hash -1502287012, now seen corresponding path program 285 times [2021-06-05 03:55:09,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:09,926 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911138270] [2021-06-05 03:55:09,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:09,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:09,995 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 48 proven. 129 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:55:09,995 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:09,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911138270] [2021-06-05 03:55:09,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911138270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:09,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097220584] [2021-06-05 03:55:09,996 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 472 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 472 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:10,027 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-06-05 03:55:10,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:10,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 03:55:10,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:10,104 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 48 proven. 129 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:55:10,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097220584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:10,104 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:10,104 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-06-05 03:55:10,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797272670] [2021-06-05 03:55:10,105 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 03:55:10,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:10,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 03:55:10,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:55:10,105 INFO L87 Difference]: Start difference. First operand 15532 states and 39622 transitions. Second operand has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:10,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:10,315 INFO L93 Difference]: Finished difference Result 18411 states and 44785 transitions. [2021-06-05 03:55:10,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 03:55:10,315 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 03:55:10,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:10,334 INFO L225 Difference]: With dead ends: 18411 [2021-06-05 03:55:10,334 INFO L226 Difference]: Without dead ends: 18387 [2021-06-05 03:55:10,334 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 79.8ms TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:55:10,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18387 states. [2021-06-05 03:55:10,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18387 to 15532. [2021-06-05 03:55:10,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15532 states, 15531 states have (on average 2.54993239327796) internal successors, (39603), 15531 states have internal predecessors, (39603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:10,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15532 states to 15532 states and 39603 transitions. [2021-06-05 03:55:10,604 INFO L78 Accepts]: Start accepts. Automaton has 15532 states and 39603 transitions. Word has length 59 [2021-06-05 03:55:10,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:10,604 INFO L482 AbstractCegarLoop]: Abstraction has 15532 states and 39603 transitions. [2021-06-05 03:55:10,604 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:10,604 INFO L276 IsEmpty]: Start isEmpty. Operand 15532 states and 39603 transitions. [2021-06-05 03:55:10,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 03:55:10,612 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:10,613 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:10,813 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 472 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable976 [2021-06-05 03:55:10,813 INFO L430 AbstractCegarLoop]: === Iteration 481 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:10,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:10,813 INFO L82 PathProgramCache]: Analyzing trace with hash 1414957709, now seen corresponding path program 286 times [2021-06-05 03:55:10,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:10,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910286534] [2021-06-05 03:55:10,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:10,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:10,908 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 157 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:55:10,908 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:10,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910286534] [2021-06-05 03:55:10,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910286534] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:10,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451693511] [2021-06-05 03:55:10,908 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 473 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 473 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:10,934 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:55:10,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:10,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 03:55:10,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:11,012 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 158 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:55:11,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451693511] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:11,012 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:11,012 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 03:55:11,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585986668] [2021-06-05 03:55:11,012 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:55:11,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:11,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:55:11,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:55:11,013 INFO L87 Difference]: Start difference. First operand 15532 states and 39603 transitions. Second operand has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:12,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:12,035 INFO L93 Difference]: Finished difference Result 24361 states and 58995 transitions. [2021-06-05 03:55:12,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 03:55:12,035 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 03:55:12,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:12,061 INFO L225 Difference]: With dead ends: 24361 [2021-06-05 03:55:12,061 INFO L226 Difference]: Without dead ends: 24193 [2021-06-05 03:55:12,061 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 438.4ms TimeCoverageRelationStatistics Valid=279, Invalid=2271, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 03:55:12,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24193 states. [2021-06-05 03:55:12,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24193 to 16448. [2021-06-05 03:55:12,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16448 states, 16447 states have (on average 2.5559676536754425) internal successors, (42038), 16447 states have internal predecessors, (42038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:12,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16448 states to 16448 states and 42038 transitions. [2021-06-05 03:55:12,308 INFO L78 Accepts]: Start accepts. Automaton has 16448 states and 42038 transitions. Word has length 59 [2021-06-05 03:55:12,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:12,308 INFO L482 AbstractCegarLoop]: Abstraction has 16448 states and 42038 transitions. [2021-06-05 03:55:12,308 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:12,308 INFO L276 IsEmpty]: Start isEmpty. Operand 16448 states and 42038 transitions. [2021-06-05 03:55:12,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 03:55:12,318 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:12,318 INFO L521 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:12,518 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable980,473 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:12,518 INFO L430 AbstractCegarLoop]: === Iteration 482 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:12,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:12,518 INFO L82 PathProgramCache]: Analyzing trace with hash 1801560386, now seen corresponding path program 287 times [2021-06-05 03:55:12,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:12,518 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131569559] [2021-06-05 03:55:12,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:12,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:12,598 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 43 proven. 134 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:55:12,599 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:12,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131569559] [2021-06-05 03:55:12,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131569559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:12,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760015473] [2021-06-05 03:55:12,599 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 474 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 474 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:12,628 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-06-05 03:55:12,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:12,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 03:55:12,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:12,724 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 43 proven. 134 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:55:12,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760015473] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:12,724 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:12,724 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 16 [2021-06-05 03:55:12,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336135900] [2021-06-05 03:55:12,724 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 03:55:12,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:12,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 03:55:12,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:55:12,725 INFO L87 Difference]: Start difference. First operand 16448 states and 42038 transitions. Second operand has 17 states, 17 states have (on average 4.470588235294118) internal successors, (76), 16 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:12,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:12,973 INFO L93 Difference]: Finished difference Result 19584 states and 47707 transitions. [2021-06-05 03:55:12,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 03:55:12,973 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.470588235294118) internal successors, (76), 16 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 03:55:12,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:12,993 INFO L225 Difference]: With dead ends: 19584 [2021-06-05 03:55:12,993 INFO L226 Difference]: Without dead ends: 19551 [2021-06-05 03:55:12,994 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 119.0ms TimeCoverageRelationStatistics Valid=122, Invalid=298, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:55:13,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19551 states. [2021-06-05 03:55:13,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19551 to 16448. [2021-06-05 03:55:13,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16448 states, 16447 states have (on average 2.5550556332461847) internal successors, (42023), 16447 states have internal predecessors, (42023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:13,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16448 states to 16448 states and 42023 transitions. [2021-06-05 03:55:13,213 INFO L78 Accepts]: Start accepts. Automaton has 16448 states and 42023 transitions. Word has length 59 [2021-06-05 03:55:13,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:13,213 INFO L482 AbstractCegarLoop]: Abstraction has 16448 states and 42023 transitions. [2021-06-05 03:55:13,213 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.470588235294118) internal successors, (76), 16 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:13,213 INFO L276 IsEmpty]: Start isEmpty. Operand 16448 states and 42023 transitions. [2021-06-05 03:55:13,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 03:55:13,223 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:13,223 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:13,423 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 474 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable981 [2021-06-05 03:55:13,424 INFO L430 AbstractCegarLoop]: === Iteration 483 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:13,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:13,424 INFO L82 PathProgramCache]: Analyzing trace with hash 1355266199, now seen corresponding path program 288 times [2021-06-05 03:55:13,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:13,424 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982412169] [2021-06-05 03:55:13,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:13,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:13,528 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 157 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:55:13,529 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:13,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982412169] [2021-06-05 03:55:13,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982412169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:13,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764223553] [2021-06-05 03:55:13,529 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 475 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 475 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:13,560 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-06-05 03:55:13,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:13,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 03:55:13,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:13,637 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 158 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:55:13,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764223553] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:13,638 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:13,638 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 03:55:13,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544195474] [2021-06-05 03:55:13,638 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 03:55:13,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:13,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 03:55:13,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:55:13,638 INFO L87 Difference]: Start difference. First operand 16448 states and 42023 transitions. Second operand has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:15,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:15,229 INFO L93 Difference]: Finished difference Result 35626 states and 84935 transitions. [2021-06-05 03:55:15,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-06-05 03:55:15,229 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 03:55:15,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:15,269 INFO L225 Difference]: With dead ends: 35626 [2021-06-05 03:55:15,269 INFO L226 Difference]: Without dead ends: 35104 [2021-06-05 03:55:15,269 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2343 ImplicationChecksByTransitivity, 831.5ms TimeCoverageRelationStatistics Valid=657, Invalid=6149, Unknown=0, NotChecked=0, Total=6806 [2021-06-05 03:55:15,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35104 states. [2021-06-05 03:55:15,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35104 to 17932. [2021-06-05 03:55:15,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17932 states, 17931 states have (on average 2.560760693770565) internal successors, (45917), 17931 states have internal predecessors, (45917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:15,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17932 states to 17932 states and 45917 transitions. [2021-06-05 03:55:15,593 INFO L78 Accepts]: Start accepts. Automaton has 17932 states and 45917 transitions. Word has length 59 [2021-06-05 03:55:15,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:15,593 INFO L482 AbstractCegarLoop]: Abstraction has 17932 states and 45917 transitions. [2021-06-05 03:55:15,593 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:15,593 INFO L276 IsEmpty]: Start isEmpty. Operand 17932 states and 45917 transitions. [2021-06-05 03:55:15,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 03:55:15,604 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:15,604 INFO L521 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:15,804 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable986,475 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:15,804 INFO L430 AbstractCegarLoop]: === Iteration 484 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:15,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:15,804 INFO L82 PathProgramCache]: Analyzing trace with hash -1046128228, now seen corresponding path program 289 times [2021-06-05 03:55:15,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:15,804 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410565349] [2021-06-05 03:55:15,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:15,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:15,891 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 44 proven. 133 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:55:15,892 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:15,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410565349] [2021-06-05 03:55:15,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410565349] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:15,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869692690] [2021-06-05 03:55:15,892 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 476 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 476 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:15,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:15,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 03:55:15,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:15,994 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 44 proven. 133 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:55:15,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869692690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:15,994 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:15,994 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-06-05 03:55:15,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623502296] [2021-06-05 03:55:15,994 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 03:55:15,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:15,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 03:55:15,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:55:15,995 INFO L87 Difference]: Start difference. First operand 17932 states and 45917 transitions. Second operand has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:16,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:16,245 INFO L93 Difference]: Finished difference Result 21190 states and 51795 transitions. [2021-06-05 03:55:16,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 03:55:16,245 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 03:55:16,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:16,267 INFO L225 Difference]: With dead ends: 21190 [2021-06-05 03:55:16,267 INFO L226 Difference]: Without dead ends: 21148 [2021-06-05 03:55:16,267 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 114.4ms TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2021-06-05 03:55:16,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21148 states. [2021-06-05 03:55:16,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21148 to 17932. [2021-06-05 03:55:16,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17932 states, 17931 states have (on average 2.5599241537002957) internal successors, (45902), 17931 states have internal predecessors, (45902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:16,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17932 states to 17932 states and 45902 transitions. [2021-06-05 03:55:16,512 INFO L78 Accepts]: Start accepts. Automaton has 17932 states and 45902 transitions. Word has length 59 [2021-06-05 03:55:16,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:16,512 INFO L482 AbstractCegarLoop]: Abstraction has 17932 states and 45902 transitions. [2021-06-05 03:55:16,512 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:16,512 INFO L276 IsEmpty]: Start isEmpty. Operand 17932 states and 45902 transitions. [2021-06-05 03:55:16,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 03:55:16,522 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:16,522 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:16,722 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 476 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable987 [2021-06-05 03:55:16,722 INFO L430 AbstractCegarLoop]: === Iteration 485 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:16,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:16,723 INFO L82 PathProgramCache]: Analyzing trace with hash 1201952333, now seen corresponding path program 290 times [2021-06-05 03:55:16,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:16,723 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600239155] [2021-06-05 03:55:16,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:16,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:16,838 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 157 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:55:16,838 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:16,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600239155] [2021-06-05 03:55:16,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600239155] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:16,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025553348] [2021-06-05 03:55:16,838 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 477 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 477 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:16,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:55:16,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:16,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 03:55:16,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:16,942 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 158 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:55:16,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025553348] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:16,942 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:16,942 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 03:55:16,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356814147] [2021-06-05 03:55:16,942 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:55:16,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:16,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:55:16,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:55:16,943 INFO L87 Difference]: Start difference. First operand 17932 states and 45902 transitions. Second operand has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:19,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:19,325 INFO L93 Difference]: Finished difference Result 45251 states and 107889 transitions. [2021-06-05 03:55:19,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2021-06-05 03:55:19,326 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 03:55:19,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:19,379 INFO L225 Difference]: With dead ends: 45251 [2021-06-05 03:55:19,379 INFO L226 Difference]: Without dead ends: 44633 [2021-06-05 03:55:19,381 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6679 ImplicationChecksByTransitivity, 1541.9ms TimeCoverageRelationStatistics Valid=1467, Invalid=15563, Unknown=0, NotChecked=0, Total=17030 [2021-06-05 03:55:19,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44633 states. [2021-06-05 03:55:19,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44633 to 19324. [2021-06-05 03:55:19,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19324 states, 19323 states have (on average 2.5631630699166794) internal successors, (49528), 19323 states have internal predecessors, (49528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:19,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19324 states to 19324 states and 49528 transitions. [2021-06-05 03:55:19,764 INFO L78 Accepts]: Start accepts. Automaton has 19324 states and 49528 transitions. Word has length 59 [2021-06-05 03:55:19,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:19,765 INFO L482 AbstractCegarLoop]: Abstraction has 19324 states and 49528 transitions. [2021-06-05 03:55:19,765 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:19,765 INFO L276 IsEmpty]: Start isEmpty. Operand 19324 states and 49528 transitions. [2021-06-05 03:55:19,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 03:55:19,775 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:19,775 INFO L521 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:19,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 477 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable993 [2021-06-05 03:55:19,976 INFO L430 AbstractCegarLoop]: === Iteration 486 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:19,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:19,976 INFO L82 PathProgramCache]: Analyzing trace with hash 1951369986, now seen corresponding path program 291 times [2021-06-05 03:55:19,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:19,976 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344604805] [2021-06-05 03:55:19,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:19,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:20,074 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 51 proven. 126 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:55:20,074 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:20,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344604805] [2021-06-05 03:55:20,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344604805] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:20,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319461674] [2021-06-05 03:55:20,075 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 478 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 478 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:20,104 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-05 03:55:20,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:20,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 03:55:20,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:20,183 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 51 proven. 126 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:55:20,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319461674] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:20,183 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:20,183 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-06-05 03:55:20,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008407009] [2021-06-05 03:55:20,184 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:55:20,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:20,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:55:20,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:55:20,184 INFO L87 Difference]: Start difference. First operand 19324 states and 49528 transitions. Second operand has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:20,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:20,438 INFO L93 Difference]: Finished difference Result 22688 states and 55618 transitions. [2021-06-05 03:55:20,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 03:55:20,438 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 03:55:20,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:20,464 INFO L225 Difference]: With dead ends: 22688 [2021-06-05 03:55:20,465 INFO L226 Difference]: Without dead ends: 22637 [2021-06-05 03:55:20,465 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 135.1ms TimeCoverageRelationStatistics Valid=146, Invalid=316, Unknown=0, NotChecked=0, Total=462 [2021-06-05 03:55:20,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22637 states. [2021-06-05 03:55:20,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22637 to 18993. [2021-06-05 03:55:20,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18993 states, 18992 states have (on average 2.5599726200505475) internal successors, (48619), 18992 states have internal predecessors, (48619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:20,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18993 states to 18993 states and 48619 transitions. [2021-06-05 03:55:20,754 INFO L78 Accepts]: Start accepts. Automaton has 18993 states and 48619 transitions. Word has length 59 [2021-06-05 03:55:20,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:20,754 INFO L482 AbstractCegarLoop]: Abstraction has 18993 states and 48619 transitions. [2021-06-05 03:55:20,754 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:20,754 INFO L276 IsEmpty]: Start isEmpty. Operand 18993 states and 48619 transitions. [2021-06-05 03:55:20,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 03:55:20,765 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:20,765 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:20,965 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 478 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable994 [2021-06-05 03:55:20,965 INFO L430 AbstractCegarLoop]: === Iteration 487 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:20,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:20,965 INFO L82 PathProgramCache]: Analyzing trace with hash -621194025, now seen corresponding path program 292 times [2021-06-05 03:55:20,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:20,966 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663498980] [2021-06-05 03:55:20,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:20,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:21,091 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 160 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:55:21,091 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:21,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663498980] [2021-06-05 03:55:21,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663498980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:21,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827266117] [2021-06-05 03:55:21,091 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 479 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 479 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:21,117 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:55:21,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:21,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 03:55:21,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:21,194 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 160 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:55:21,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827266117] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:21,194 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:21,194 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-06-05 03:55:21,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047477410] [2021-06-05 03:55:21,195 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 03:55:21,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:21,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 03:55:21,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:55:21,195 INFO L87 Difference]: Start difference. First operand 18993 states and 48619 transitions. Second operand has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 16 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:22,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:22,020 INFO L93 Difference]: Finished difference Result 27005 states and 64480 transitions. [2021-06-05 03:55:22,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 03:55:22,020 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 16 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 03:55:22,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:22,048 INFO L225 Difference]: With dead ends: 27005 [2021-06-05 03:55:22,048 INFO L226 Difference]: Without dead ends: 26165 [2021-06-05 03:55:22,048 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 335.2ms TimeCoverageRelationStatistics Valid=181, Invalid=1009, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 03:55:22,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26165 states. [2021-06-05 03:55:22,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26165 to 14615. [2021-06-05 03:55:22,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14615 states, 14614 states have (on average 2.5288764198713563) internal successors, (36957), 14614 states have internal predecessors, (36957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:22,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14615 states to 14615 states and 36957 transitions. [2021-06-05 03:55:22,272 INFO L78 Accepts]: Start accepts. Automaton has 14615 states and 36957 transitions. Word has length 59 [2021-06-05 03:55:22,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:22,272 INFO L482 AbstractCegarLoop]: Abstraction has 14615 states and 36957 transitions. [2021-06-05 03:55:22,272 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 16 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:22,272 INFO L276 IsEmpty]: Start isEmpty. Operand 14615 states and 36957 transitions. [2021-06-05 03:55:22,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 03:55:22,281 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:22,281 INFO L521 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:22,481 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 479 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1001 [2021-06-05 03:55:22,482 INFO L430 AbstractCegarLoop]: === Iteration 488 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:22,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:22,482 INFO L82 PathProgramCache]: Analyzing trace with hash -1481135952, now seen corresponding path program 137 times [2021-06-05 03:55:22,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:22,482 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900040027] [2021-06-05 03:55:22,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:22,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:22,545 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 136 proven. 41 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:55:22,545 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:22,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900040027] [2021-06-05 03:55:22,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900040027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:22,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507079082] [2021-06-05 03:55:22,545 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 480 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 480 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:22,578 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-06-05 03:55:22,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:22,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 03:55:22,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:22,671 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 137 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:55:22,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507079082] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:22,671 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:22,671 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 14 [2021-06-05 03:55:22,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204373726] [2021-06-05 03:55:22,671 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 03:55:22,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:22,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 03:55:22,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:55:22,671 INFO L87 Difference]: Start difference. First operand 14615 states and 36957 transitions. Second operand has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:22,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:22,922 INFO L93 Difference]: Finished difference Result 22169 states and 53449 transitions. [2021-06-05 03:55:22,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 03:55:22,923 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 03:55:22,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:22,945 INFO L225 Difference]: With dead ends: 22169 [2021-06-05 03:55:22,945 INFO L226 Difference]: Without dead ends: 22169 [2021-06-05 03:55:22,945 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 111.0ms TimeCoverageRelationStatistics Valid=180, Invalid=240, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:55:22,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22169 states. [2021-06-05 03:55:23,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22169 to 14758. [2021-06-05 03:55:23,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14758 states, 14757 states have (on average 2.533035169749949) internal successors, (37380), 14757 states have internal predecessors, (37380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:23,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14758 states to 14758 states and 37380 transitions. [2021-06-05 03:55:23,161 INFO L78 Accepts]: Start accepts. Automaton has 14758 states and 37380 transitions. Word has length 59 [2021-06-05 03:55:23,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:23,161 INFO L482 AbstractCegarLoop]: Abstraction has 14758 states and 37380 transitions. [2021-06-05 03:55:23,161 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:23,161 INFO L276 IsEmpty]: Start isEmpty. Operand 14758 states and 37380 transitions. [2021-06-05 03:55:23,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 03:55:23,170 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:23,171 INFO L521 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:23,371 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 480 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1002 [2021-06-05 03:55:23,371 INFO L430 AbstractCegarLoop]: === Iteration 489 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:23,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:23,371 INFO L82 PathProgramCache]: Analyzing trace with hash 1176258888, now seen corresponding path program 138 times [2021-06-05 03:55:23,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:23,371 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359509471] [2021-06-05 03:55:23,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:23,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:23,443 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 135 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:55:23,443 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:23,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359509471] [2021-06-05 03:55:23,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359509471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:23,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923213483] [2021-06-05 03:55:23,443 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 481 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 481 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:23,474 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-06-05 03:55:23,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:23,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 03:55:23,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:23,557 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 136 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:55:23,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923213483] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:23,557 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:23,557 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2021-06-05 03:55:23,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900389128] [2021-06-05 03:55:23,558 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:55:23,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:23,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:55:23,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:55:23,558 INFO L87 Difference]: Start difference. First operand 14758 states and 37380 transitions. Second operand has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:23,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:23,921 INFO L93 Difference]: Finished difference Result 24727 states and 59450 transitions. [2021-06-05 03:55:23,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 03:55:23,922 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 03:55:23,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:23,948 INFO L225 Difference]: With dead ends: 24727 [2021-06-05 03:55:23,948 INFO L226 Difference]: Without dead ends: 24727 [2021-06-05 03:55:23,948 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 150.7ms TimeCoverageRelationStatistics Valid=237, Invalid=363, Unknown=0, NotChecked=0, Total=600 [2021-06-05 03:55:23,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24727 states. [2021-06-05 03:55:24,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24727 to 14806. [2021-06-05 03:55:24,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14806 states, 14805 states have (on average 2.534481594056062) internal successors, (37523), 14805 states have internal predecessors, (37523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:24,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14806 states to 14806 states and 37523 transitions. [2021-06-05 03:55:24,176 INFO L78 Accepts]: Start accepts. Automaton has 14806 states and 37523 transitions. Word has length 59 [2021-06-05 03:55:24,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:24,176 INFO L482 AbstractCegarLoop]: Abstraction has 14806 states and 37523 transitions. [2021-06-05 03:55:24,176 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:24,176 INFO L276 IsEmpty]: Start isEmpty. Operand 14806 states and 37523 transitions. [2021-06-05 03:55:24,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 03:55:24,185 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:24,185 INFO L521 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:24,385 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1003,481 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:24,385 INFO L430 AbstractCegarLoop]: === Iteration 490 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:24,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:24,385 INFO L82 PathProgramCache]: Analyzing trace with hash -513736276, now seen corresponding path program 139 times [2021-06-05 03:55:24,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:24,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848538286] [2021-06-05 03:55:24,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:24,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:24,467 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 128 proven. 49 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:55:24,467 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:24,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848538286] [2021-06-05 03:55:24,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848538286] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:24,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919892283] [2021-06-05 03:55:24,467 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 482 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 482 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:24,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:24,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 03:55:24,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:24,577 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 129 proven. 49 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:55:24,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919892283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:24,577 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:24,577 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 14 [2021-06-05 03:55:24,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779762510] [2021-06-05 03:55:24,577 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 03:55:24,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:24,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 03:55:24,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:55:24,578 INFO L87 Difference]: Start difference. First operand 14806 states and 37523 transitions. Second operand has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:25,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:25,035 INFO L93 Difference]: Finished difference Result 25465 states and 61218 transitions. [2021-06-05 03:55:25,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 03:55:25,035 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 03:55:25,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:25,062 INFO L225 Difference]: With dead ends: 25465 [2021-06-05 03:55:25,063 INFO L226 Difference]: Without dead ends: 25465 [2021-06-05 03:55:25,063 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 189.5ms TimeCoverageRelationStatistics Valid=313, Invalid=499, Unknown=0, NotChecked=0, Total=812 [2021-06-05 03:55:25,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25465 states. [2021-06-05 03:55:25,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25465 to 14863. [2021-06-05 03:55:25,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14863 states, 14862 states have (on average 2.5361997039429416) internal successors, (37693), 14862 states have internal predecessors, (37693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:25,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14863 states to 14863 states and 37693 transitions. [2021-06-05 03:55:25,302 INFO L78 Accepts]: Start accepts. Automaton has 14863 states and 37693 transitions. Word has length 59 [2021-06-05 03:55:25,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:25,302 INFO L482 AbstractCegarLoop]: Abstraction has 14863 states and 37693 transitions. [2021-06-05 03:55:25,302 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:25,302 INFO L276 IsEmpty]: Start isEmpty. Operand 14863 states and 37693 transitions. [2021-06-05 03:55:25,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 03:55:25,311 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:25,311 INFO L521 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:25,511 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 482 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1004 [2021-06-05 03:55:25,511 INFO L430 AbstractCegarLoop]: === Iteration 491 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:25,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:25,511 INFO L82 PathProgramCache]: Analyzing trace with hash -1553023288, now seen corresponding path program 140 times [2021-06-05 03:55:25,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:25,511 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142094009] [2021-06-05 03:55:25,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:25,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:25,606 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 121 proven. 56 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:55:25,606 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:25,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142094009] [2021-06-05 03:55:25,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142094009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:25,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728826862] [2021-06-05 03:55:25,606 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 483 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 483 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:25,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:55:25,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:25,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 03:55:25,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:25,716 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 122 proven. 56 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:55:25,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728826862] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:25,716 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:25,716 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 15 [2021-06-05 03:55:25,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619762900] [2021-06-05 03:55:25,717 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:55:25,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:25,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:55:25,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:55:25,717 INFO L87 Difference]: Start difference. First operand 14863 states and 37693 transitions. Second operand has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:26,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:26,141 INFO L93 Difference]: Finished difference Result 24352 states and 58685 transitions. [2021-06-05 03:55:26,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 03:55:26,142 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 03:55:26,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:26,167 INFO L225 Difference]: With dead ends: 24352 [2021-06-05 03:55:26,167 INFO L226 Difference]: Without dead ends: 24352 [2021-06-05 03:55:26,167 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 215.7ms TimeCoverageRelationStatistics Valid=355, Invalid=575, Unknown=0, NotChecked=0, Total=930 [2021-06-05 03:55:26,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24352 states. [2021-06-05 03:55:26,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24352 to 14909. [2021-06-05 03:55:26,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14909 states, 14908 states have (on average 2.5376978803327073) internal successors, (37832), 14908 states have internal predecessors, (37832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:26,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14909 states to 14909 states and 37832 transitions. [2021-06-05 03:55:26,393 INFO L78 Accepts]: Start accepts. Automaton has 14909 states and 37832 transitions. Word has length 59 [2021-06-05 03:55:26,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:26,393 INFO L482 AbstractCegarLoop]: Abstraction has 14909 states and 37832 transitions. [2021-06-05 03:55:26,393 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:26,393 INFO L276 IsEmpty]: Start isEmpty. Operand 14909 states and 37832 transitions. [2021-06-05 03:55:26,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 03:55:26,402 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:26,402 INFO L521 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:26,602 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1005,483 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:26,602 INFO L430 AbstractCegarLoop]: === Iteration 492 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:26,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:26,603 INFO L82 PathProgramCache]: Analyzing trace with hash -533160916, now seen corresponding path program 141 times [2021-06-05 03:55:26,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:26,603 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656930084] [2021-06-05 03:55:26,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:26,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:26,765 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 114 proven. 63 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:55:26,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:26,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656930084] [2021-06-05 03:55:26,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656930084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:26,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303434925] [2021-06-05 03:55:26,765 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 484 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 484 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:26,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-06-05 03:55:26,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:26,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 03:55:26,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:26,944 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 144 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:55:26,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303434925] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:26,944 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:26,944 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 21 [2021-06-05 03:55:26,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972377062] [2021-06-05 03:55:26,944 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 03:55:26,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:26,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 03:55:26,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=308, Unknown=0, NotChecked=0, Total=462 [2021-06-05 03:55:26,945 INFO L87 Difference]: Start difference. First operand 14909 states and 37832 transitions. Second operand has 22 states, 22 states have (on average 3.409090909090909) internal successors, (75), 21 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:27,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:27,333 INFO L93 Difference]: Finished difference Result 17503 states and 42817 transitions. [2021-06-05 03:55:27,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 03:55:27,333 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.409090909090909) internal successors, (75), 21 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 03:55:27,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:27,352 INFO L225 Difference]: With dead ends: 17503 [2021-06-05 03:55:27,352 INFO L226 Difference]: Without dead ends: 17503 [2021-06-05 03:55:27,352 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 278.7ms TimeCoverageRelationStatistics Valid=266, Invalid=490, Unknown=0, NotChecked=0, Total=756 [2021-06-05 03:55:27,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17503 states. [2021-06-05 03:55:27,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17503 to 14273. [2021-06-05 03:55:27,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14273 states, 14272 states have (on average 2.5301289237668163) internal successors, (36110), 14272 states have internal predecessors, (36110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:27,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14273 states to 14273 states and 36110 transitions. [2021-06-05 03:55:27,537 INFO L78 Accepts]: Start accepts. Automaton has 14273 states and 36110 transitions. Word has length 59 [2021-06-05 03:55:27,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:27,537 INFO L482 AbstractCegarLoop]: Abstraction has 14273 states and 36110 transitions. [2021-06-05 03:55:27,537 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.409090909090909) internal successors, (75), 21 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:27,537 INFO L276 IsEmpty]: Start isEmpty. Operand 14273 states and 36110 transitions. [2021-06-05 03:55:27,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 03:55:27,547 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:27,547 INFO L521 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:27,747 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 484 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1006 [2021-06-05 03:55:27,747 INFO L430 AbstractCegarLoop]: === Iteration 493 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:27,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:27,747 INFO L82 PathProgramCache]: Analyzing trace with hash -539355172, now seen corresponding path program 293 times [2021-06-05 03:55:27,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:27,748 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15691494] [2021-06-05 03:55:27,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:27,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:27,858 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 65 proven. 113 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:55:27,858 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:27,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15691494] [2021-06-05 03:55:27,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15691494] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:27,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64492390] [2021-06-05 03:55:27,859 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 485 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 485 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:27,887 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 03:55:27,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:27,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 03:55:27,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:27,992 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 65 proven. 113 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:55:27,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64492390] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:27,992 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:27,992 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 19 [2021-06-05 03:55:27,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118632272] [2021-06-05 03:55:27,993 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 03:55:27,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:27,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 03:55:27,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2021-06-05 03:55:27,993 INFO L87 Difference]: Start difference. First operand 14273 states and 36110 transitions. Second operand has 20 states, 20 states have (on average 3.8) internal successors, (76), 19 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:28,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:28,374 INFO L93 Difference]: Finished difference Result 16871 states and 40798 transitions. [2021-06-05 03:55:28,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 03:55:28,374 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.8) internal successors, (76), 19 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 03:55:28,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:28,393 INFO L225 Difference]: With dead ends: 16871 [2021-06-05 03:55:28,394 INFO L226 Difference]: Without dead ends: 16817 [2021-06-05 03:55:28,394 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 196.9ms TimeCoverageRelationStatistics Valid=188, Invalid=514, Unknown=0, NotChecked=0, Total=702 [2021-06-05 03:55:28,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16817 states. [2021-06-05 03:55:28,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16817 to 14273. [2021-06-05 03:55:28,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14273 states, 14272 states have (on average 2.529077914798206) internal successors, (36095), 14272 states have internal predecessors, (36095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:28,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14273 states to 14273 states and 36095 transitions. [2021-06-05 03:55:28,610 INFO L78 Accepts]: Start accepts. Automaton has 14273 states and 36095 transitions. Word has length 59 [2021-06-05 03:55:28,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:28,610 INFO L482 AbstractCegarLoop]: Abstraction has 14273 states and 36095 transitions. [2021-06-05 03:55:28,610 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.8) internal successors, (76), 19 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:28,610 INFO L276 IsEmpty]: Start isEmpty. Operand 14273 states and 36095 transitions. [2021-06-05 03:55:28,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 03:55:28,619 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:28,619 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:28,819 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1009,485 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:28,819 INFO L430 AbstractCegarLoop]: === Iteration 494 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:28,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:28,820 INFO L82 PathProgramCache]: Analyzing trace with hash -1196579045, now seen corresponding path program 142 times [2021-06-05 03:55:28,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:28,820 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326876706] [2021-06-05 03:55:28,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:28,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:28,932 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 9 proven. 165 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:55:28,932 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:28,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326876706] [2021-06-05 03:55:28,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326876706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:28,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686748025] [2021-06-05 03:55:28,932 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 486 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 486 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:28,962 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:55:28,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:28,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 03:55:28,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:29,053 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 166 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:55:29,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686748025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:29,053 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:29,053 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 03:55:29,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254308580] [2021-06-05 03:55:29,053 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 03:55:29,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:29,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 03:55:29,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:55:29,053 INFO L87 Difference]: Start difference. First operand 14273 states and 36095 transitions. Second operand has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:29,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:29,588 INFO L93 Difference]: Finished difference Result 15978 states and 39441 transitions. [2021-06-05 03:55:29,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 03:55:29,588 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 03:55:29,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:29,604 INFO L225 Difference]: With dead ends: 15978 [2021-06-05 03:55:29,604 INFO L226 Difference]: Without dead ends: 15963 [2021-06-05 03:55:29,604 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 164.4ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:55:29,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15963 states. [2021-06-05 03:55:29,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15963 to 14540. [2021-06-05 03:55:29,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14540 states, 14539 states have (on average 2.5258958662906665) internal successors, (36724), 14539 states have internal predecessors, (36724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:29,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14540 states to 14540 states and 36724 transitions. [2021-06-05 03:55:29,782 INFO L78 Accepts]: Start accepts. Automaton has 14540 states and 36724 transitions. Word has length 59 [2021-06-05 03:55:29,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:29,782 INFO L482 AbstractCegarLoop]: Abstraction has 14540 states and 36724 transitions. [2021-06-05 03:55:29,782 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:29,782 INFO L276 IsEmpty]: Start isEmpty. Operand 14540 states and 36724 transitions. [2021-06-05 03:55:29,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 03:55:29,791 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:29,791 INFO L521 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:29,991 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 486 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1017 [2021-06-05 03:55:29,992 INFO L430 AbstractCegarLoop]: === Iteration 495 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:29,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:29,992 INFO L82 PathProgramCache]: Analyzing trace with hash 1751753960, now seen corresponding path program 294 times [2021-06-05 03:55:29,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:29,992 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618251796] [2021-06-05 03:55:29,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:29,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:30,127 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 69 proven. 105 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 03:55:30,127 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:30,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618251796] [2021-06-05 03:55:30,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618251796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:30,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13234305] [2021-06-05 03:55:30,127 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 487 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 487 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:30,156 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-06-05 03:55:30,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:30,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 03:55:30,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:30,232 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 69 proven. 105 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 03:55:30,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13234305] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:30,232 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:30,232 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 03:55:30,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445345731] [2021-06-05 03:55:30,232 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 03:55:30,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:30,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 03:55:30,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:55:30,233 INFO L87 Difference]: Start difference. First operand 14540 states and 36724 transitions. Second operand has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:30,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:30,406 INFO L93 Difference]: Finished difference Result 17442 states and 41946 transitions. [2021-06-05 03:55:30,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 03:55:30,407 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 03:55:30,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:30,423 INFO L225 Difference]: With dead ends: 17442 [2021-06-05 03:55:30,423 INFO L226 Difference]: Without dead ends: 17424 [2021-06-05 03:55:30,423 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 143.3ms TimeCoverageRelationStatistics Valid=86, Invalid=124, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:55:30,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17424 states. [2021-06-05 03:55:30,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17424 to 14540. [2021-06-05 03:55:30,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14540 states, 14539 states have (on average 2.5246578169062524) internal successors, (36706), 14539 states have internal predecessors, (36706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:30,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14540 states to 14540 states and 36706 transitions. [2021-06-05 03:55:30,604 INFO L78 Accepts]: Start accepts. Automaton has 14540 states and 36706 transitions. Word has length 59 [2021-06-05 03:55:30,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:30,604 INFO L482 AbstractCegarLoop]: Abstraction has 14540 states and 36706 transitions. [2021-06-05 03:55:30,604 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:30,604 INFO L276 IsEmpty]: Start isEmpty. Operand 14540 states and 36706 transitions. [2021-06-05 03:55:30,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 03:55:30,613 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:30,613 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:30,814 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1018,487 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:30,814 INFO L430 AbstractCegarLoop]: === Iteration 496 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:30,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:30,814 INFO L82 PathProgramCache]: Analyzing trace with hash 303753947, now seen corresponding path program 295 times [2021-06-05 03:55:30,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:30,814 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221987461] [2021-06-05 03:55:30,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:30,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:30,898 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 20 proven. 154 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:55:30,899 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:30,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221987461] [2021-06-05 03:55:30,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221987461] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:30,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210131453] [2021-06-05 03:55:30,899 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 488 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 488 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:30,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:30,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 03:55:30,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:31,013 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 15 proven. 159 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:55:31,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210131453] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:31,013 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:31,013 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 03:55:31,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157060304] [2021-06-05 03:55:31,013 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 03:55:31,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:31,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 03:55:31,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:55:31,013 INFO L87 Difference]: Start difference. First operand 14540 states and 36706 transitions. Second operand has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:31,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:31,718 INFO L93 Difference]: Finished difference Result 15609 states and 38572 transitions. [2021-06-05 03:55:31,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 03:55:31,718 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 03:55:31,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:31,733 INFO L225 Difference]: With dead ends: 15609 [2021-06-05 03:55:31,734 INFO L226 Difference]: Without dead ends: 15481 [2021-06-05 03:55:31,734 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 138.5ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:55:31,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15481 states. [2021-06-05 03:55:31,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15481 to 14586. [2021-06-05 03:55:31,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14586 states, 14585 states have (on average 2.5154610901611245) internal successors, (36688), 14585 states have internal predecessors, (36688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:31,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14586 states to 14586 states and 36688 transitions. [2021-06-05 03:55:31,912 INFO L78 Accepts]: Start accepts. Automaton has 14586 states and 36688 transitions. Word has length 59 [2021-06-05 03:55:31,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:31,912 INFO L482 AbstractCegarLoop]: Abstraction has 14586 states and 36688 transitions. [2021-06-05 03:55:31,912 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:31,912 INFO L276 IsEmpty]: Start isEmpty. Operand 14586 states and 36688 transitions. [2021-06-05 03:55:31,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 03:55:31,921 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:31,922 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:32,122 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1021,488 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:32,122 INFO L430 AbstractCegarLoop]: === Iteration 497 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:32,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:32,122 INFO L82 PathProgramCache]: Analyzing trace with hash -309782233, now seen corresponding path program 296 times [2021-06-05 03:55:32,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:32,122 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533430194] [2021-06-05 03:55:32,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:32,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:32,212 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 155 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 03:55:32,212 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:32,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533430194] [2021-06-05 03:55:32,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533430194] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:32,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164536615] [2021-06-05 03:55:32,212 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 489 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 489 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:32,238 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:55:32,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:32,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 03:55:32,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:32,320 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 156 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 03:55:32,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164536615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:32,320 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:32,320 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 03:55:32,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203152875] [2021-06-05 03:55:32,320 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 03:55:32,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:32,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 03:55:32,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:55:32,320 INFO L87 Difference]: Start difference. First operand 14586 states and 36688 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:32,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:32,841 INFO L93 Difference]: Finished difference Result 16298 states and 40065 transitions. [2021-06-05 03:55:32,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 03:55:32,841 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 03:55:32,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:32,858 INFO L225 Difference]: With dead ends: 16298 [2021-06-05 03:55:32,858 INFO L226 Difference]: Without dead ends: 16286 [2021-06-05 03:55:32,859 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 140.8ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:55:32,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16286 states. [2021-06-05 03:55:33,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16286 to 14730. [2021-06-05 03:55:33,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14730 states, 14729 states have (on average 2.5157172924163214) internal successors, (37054), 14729 states have internal predecessors, (37054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:33,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14730 states to 14730 states and 37054 transitions. [2021-06-05 03:55:33,051 INFO L78 Accepts]: Start accepts. Automaton has 14730 states and 37054 transitions. Word has length 59 [2021-06-05 03:55:33,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:33,051 INFO L482 AbstractCegarLoop]: Abstraction has 14730 states and 37054 transitions. [2021-06-05 03:55:33,051 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:33,051 INFO L276 IsEmpty]: Start isEmpty. Operand 14730 states and 37054 transitions. [2021-06-05 03:55:33,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 03:55:33,062 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:33,062 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:33,262 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 489 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1022 [2021-06-05 03:55:33,262 INFO L430 AbstractCegarLoop]: === Iteration 498 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:33,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:33,263 INFO L82 PathProgramCache]: Analyzing trace with hash 1832135101, now seen corresponding path program 297 times [2021-06-05 03:55:33,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:33,263 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995000937] [2021-06-05 03:55:33,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:33,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:33,404 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 157 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:55:33,404 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:33,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995000937] [2021-06-05 03:55:33,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995000937] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:33,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436468374] [2021-06-05 03:55:33,404 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 490 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 490 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:33,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-06-05 03:55:33,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:33,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 03:55:33,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:33,513 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 158 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:55:33,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436468374] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:33,514 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:33,514 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 03:55:33,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838852964] [2021-06-05 03:55:33,514 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 03:55:33,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:33,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 03:55:33,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:55:33,514 INFO L87 Difference]: Start difference. First operand 14730 states and 37054 transitions. Second operand has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:34,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:34,295 INFO L93 Difference]: Finished difference Result 18459 states and 44889 transitions. [2021-06-05 03:55:34,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 03:55:34,295 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 03:55:34,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:34,317 INFO L225 Difference]: With dead ends: 18459 [2021-06-05 03:55:34,317 INFO L226 Difference]: Without dead ends: 18405 [2021-06-05 03:55:34,317 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 314.5ms TimeCoverageRelationStatistics Valid=129, Invalid=927, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 03:55:34,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18405 states. [2021-06-05 03:55:34,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18405 to 15161. [2021-06-05 03:55:34,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15161 states, 15160 states have (on average 2.5215039577836413) internal successors, (38226), 15160 states have internal predecessors, (38226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:34,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15161 states to 15161 states and 38226 transitions. [2021-06-05 03:55:34,528 INFO L78 Accepts]: Start accepts. Automaton has 15161 states and 38226 transitions. Word has length 59 [2021-06-05 03:55:34,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:34,528 INFO L482 AbstractCegarLoop]: Abstraction has 15161 states and 38226 transitions. [2021-06-05 03:55:34,528 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:34,528 INFO L276 IsEmpty]: Start isEmpty. Operand 15161 states and 38226 transitions. [2021-06-05 03:55:34,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 03:55:34,538 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:34,538 INFO L521 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:34,738 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 490 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1023 [2021-06-05 03:55:34,738 INFO L430 AbstractCegarLoop]: === Iteration 499 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:34,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:34,739 INFO L82 PathProgramCache]: Analyzing trace with hash -930273086, now seen corresponding path program 298 times [2021-06-05 03:55:34,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:34,739 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713538429] [2021-06-05 03:55:34,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:34,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:34,811 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 55 proven. 122 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:55:34,812 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:34,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713538429] [2021-06-05 03:55:34,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713538429] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:34,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539148772] [2021-06-05 03:55:34,812 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 491 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 491 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:34,838 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:55:34,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:34,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 03:55:34,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:34,917 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 55 proven. 122 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:55:34,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539148772] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:34,918 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:34,918 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-06-05 03:55:34,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057169213] [2021-06-05 03:55:34,918 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 03:55:34,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:34,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 03:55:34,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:55:34,918 INFO L87 Difference]: Start difference. First operand 15161 states and 38226 transitions. Second operand has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:35,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:35,127 INFO L93 Difference]: Finished difference Result 18207 states and 43712 transitions. [2021-06-05 03:55:35,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 03:55:35,128 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 03:55:35,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:35,146 INFO L225 Difference]: With dead ends: 18207 [2021-06-05 03:55:35,146 INFO L226 Difference]: Without dead ends: 18183 [2021-06-05 03:55:35,146 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 82.9ms TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:55:35,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18183 states. [2021-06-05 03:55:35,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18183 to 15161. [2021-06-05 03:55:35,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15161 states, 15160 states have (on average 2.520580474934037) internal successors, (38212), 15160 states have internal predecessors, (38212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:35,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15161 states to 15161 states and 38212 transitions. [2021-06-05 03:55:35,345 INFO L78 Accepts]: Start accepts. Automaton has 15161 states and 38212 transitions. Word has length 59 [2021-06-05 03:55:35,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:35,345 INFO L482 AbstractCegarLoop]: Abstraction has 15161 states and 38212 transitions. [2021-06-05 03:55:35,345 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:35,345 INFO L276 IsEmpty]: Start isEmpty. Operand 15161 states and 38212 transitions. [2021-06-05 03:55:35,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 03:55:35,355 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:35,355 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:35,555 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1024,491 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:35,555 INFO L430 AbstractCegarLoop]: === Iteration 500 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:35,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:35,555 INFO L82 PathProgramCache]: Analyzing trace with hash 1986971635, now seen corresponding path program 299 times [2021-06-05 03:55:35,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:35,555 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271044636] [2021-06-05 03:55:35,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:35,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:35,657 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 157 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:55:35,657 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:35,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271044636] [2021-06-05 03:55:35,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271044636] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:35,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175058950] [2021-06-05 03:55:35,658 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 492 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 492 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:35,689 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-06-05 03:55:35,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:35,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 03:55:35,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:35,768 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 158 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:55:35,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175058950] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:35,768 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:35,768 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 03:55:35,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684242920] [2021-06-05 03:55:35,769 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:55:35,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:35,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:55:35,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:55:35,769 INFO L87 Difference]: Start difference. First operand 15161 states and 38212 transitions. Second operand has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:36,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:36,943 INFO L93 Difference]: Finished difference Result 23302 states and 55848 transitions. [2021-06-05 03:55:36,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 03:55:36,944 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 03:55:36,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:36,963 INFO L225 Difference]: With dead ends: 23302 [2021-06-05 03:55:36,963 INFO L226 Difference]: Without dead ends: 23134 [2021-06-05 03:55:36,963 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 945 ImplicationChecksByTransitivity, 509.9ms TimeCoverageRelationStatistics Valid=327, Invalid=2865, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 03:55:36,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23134 states. [2021-06-05 03:55:37,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23134 to 16060. [2021-06-05 03:55:37,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16060 states, 16059 states have (on average 2.526745127342923) internal successors, (40577), 16059 states have internal predecessors, (40577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:37,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16060 states to 16060 states and 40577 transitions. [2021-06-05 03:55:37,174 INFO L78 Accepts]: Start accepts. Automaton has 16060 states and 40577 transitions. Word has length 59 [2021-06-05 03:55:37,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:37,174 INFO L482 AbstractCegarLoop]: Abstraction has 16060 states and 40577 transitions. [2021-06-05 03:55:37,174 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:37,174 INFO L276 IsEmpty]: Start isEmpty. Operand 16060 states and 40577 transitions. [2021-06-05 03:55:37,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 03:55:37,183 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:37,183 INFO L521 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:37,383 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 492 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1028 [2021-06-05 03:55:37,384 INFO L430 AbstractCegarLoop]: === Iteration 501 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:37,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:37,384 INFO L82 PathProgramCache]: Analyzing trace with hash -1921392984, now seen corresponding path program 300 times [2021-06-05 03:55:37,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:37,384 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42715502] [2021-06-05 03:55:37,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:37,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:37,466 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 47 proven. 130 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:55:37,466 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:37,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42715502] [2021-06-05 03:55:37,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42715502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:37,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560049358] [2021-06-05 03:55:37,466 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 493 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 493 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:37,496 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-06-05 03:55:37,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:37,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 03:55:37,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:37,574 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 47 proven. 130 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:55:37,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560049358] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:37,574 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:37,574 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-06-05 03:55:37,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549335011] [2021-06-05 03:55:37,574 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:55:37,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:37,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:55:37,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:55:37,575 INFO L87 Difference]: Start difference. First operand 16060 states and 40577 transitions. Second operand has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:37,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:37,778 INFO L93 Difference]: Finished difference Result 19290 states and 46411 transitions. [2021-06-05 03:55:37,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 03:55:37,779 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 03:55:37,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:37,798 INFO L225 Difference]: With dead ends: 19290 [2021-06-05 03:55:37,798 INFO L226 Difference]: Without dead ends: 19257 [2021-06-05 03:55:37,798 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 99.6ms TimeCoverageRelationStatistics Valid=108, Invalid=198, Unknown=0, NotChecked=0, Total=306 [2021-06-05 03:55:37,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19257 states. [2021-06-05 03:55:37,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19257 to 16060. [2021-06-05 03:55:37,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16060 states, 16059 states have (on average 2.5261846939410924) internal successors, (40568), 16059 states have internal predecessors, (40568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:38,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16060 states to 16060 states and 40568 transitions. [2021-06-05 03:55:38,005 INFO L78 Accepts]: Start accepts. Automaton has 16060 states and 40568 transitions. Word has length 59 [2021-06-05 03:55:38,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:38,006 INFO L482 AbstractCegarLoop]: Abstraction has 16060 states and 40568 transitions. [2021-06-05 03:55:38,006 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:38,006 INFO L276 IsEmpty]: Start isEmpty. Operand 16060 states and 40568 transitions. [2021-06-05 03:55:38,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 03:55:38,015 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:38,015 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:38,215 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1029,493 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:38,215 INFO L430 AbstractCegarLoop]: === Iteration 502 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:38,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:38,215 INFO L82 PathProgramCache]: Analyzing trace with hash 1927280125, now seen corresponding path program 301 times [2021-06-05 03:55:38,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:38,216 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993321152] [2021-06-05 03:55:38,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:38,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:38,319 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 157 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:55:38,319 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:38,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993321152] [2021-06-05 03:55:38,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993321152] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:38,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008109830] [2021-06-05 03:55:38,320 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 494 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 494 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:38,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:38,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 03:55:38,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:38,422 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 158 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:55:38,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008109830] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:38,423 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:38,423 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 03:55:38,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188469589] [2021-06-05 03:55:38,423 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 03:55:38,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:38,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 03:55:38,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:55:38,423 INFO L87 Difference]: Start difference. First operand 16060 states and 40568 transitions. Second operand has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:40,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:40,199 INFO L93 Difference]: Finished difference Result 33633 states and 79425 transitions. [2021-06-05 03:55:40,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-06-05 03:55:40,199 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 03:55:40,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:40,237 INFO L225 Difference]: With dead ends: 33633 [2021-06-05 03:55:40,237 INFO L226 Difference]: Without dead ends: 33177 [2021-06-05 03:55:40,238 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3400 ImplicationChecksByTransitivity, 1004.6ms TimeCoverageRelationStatistics Valid=813, Invalid=8499, Unknown=0, NotChecked=0, Total=9312 [2021-06-05 03:55:40,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33177 states. [2021-06-05 03:55:40,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33177 to 17660. [2021-06-05 03:55:40,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17660 states, 17659 states have (on average 2.532532986012798) internal successors, (44722), 17659 states have internal predecessors, (44722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:40,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17660 states to 17660 states and 44722 transitions. [2021-06-05 03:55:40,552 INFO L78 Accepts]: Start accepts. Automaton has 17660 states and 44722 transitions. Word has length 59 [2021-06-05 03:55:40,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:40,553 INFO L482 AbstractCegarLoop]: Abstraction has 17660 states and 44722 transitions. [2021-06-05 03:55:40,553 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:40,553 INFO L276 IsEmpty]: Start isEmpty. Operand 17660 states and 44722 transitions. [2021-06-05 03:55:40,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 03:55:40,562 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:40,562 INFO L521 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:40,762 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 494 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1034 [2021-06-05 03:55:40,762 INFO L430 AbstractCegarLoop]: === Iteration 503 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:40,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:40,763 INFO L82 PathProgramCache]: Analyzing trace with hash -474114302, now seen corresponding path program 302 times [2021-06-05 03:55:40,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:40,763 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573091335] [2021-06-05 03:55:40,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:40,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:40,854 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 45 proven. 132 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:55:40,854 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:40,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573091335] [2021-06-05 03:55:40,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573091335] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:40,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277117550] [2021-06-05 03:55:40,854 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 495 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 495 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:40,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:55:40,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:40,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 03:55:40,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:40,960 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 45 proven. 132 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:55:40,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277117550] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:40,960 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:40,960 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-06-05 03:55:40,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127905738] [2021-06-05 03:55:40,960 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 03:55:40,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:40,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 03:55:40,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:55:40,961 INFO L87 Difference]: Start difference. First operand 17660 states and 44722 transitions. Second operand has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:41,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:41,207 INFO L93 Difference]: Finished difference Result 21199 states and 51145 transitions. [2021-06-05 03:55:41,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 03:55:41,208 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 03:55:41,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:41,229 INFO L225 Difference]: With dead ends: 21199 [2021-06-05 03:55:41,229 INFO L226 Difference]: Without dead ends: 21157 [2021-06-05 03:55:41,230 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 117.4ms TimeCoverageRelationStatistics Valid=129, Invalid=251, Unknown=0, NotChecked=0, Total=380 [2021-06-05 03:55:41,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21157 states. [2021-06-05 03:55:41,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21157 to 17660. [2021-06-05 03:55:41,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17660 states, 17659 states have (on average 2.532023330879438) internal successors, (44713), 17659 states have internal predecessors, (44713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:41,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17660 states to 17660 states and 44713 transitions. [2021-06-05 03:55:41,469 INFO L78 Accepts]: Start accepts. Automaton has 17660 states and 44713 transitions. Word has length 59 [2021-06-05 03:55:41,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:41,469 INFO L482 AbstractCegarLoop]: Abstraction has 17660 states and 44713 transitions. [2021-06-05 03:55:41,469 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:41,469 INFO L276 IsEmpty]: Start isEmpty. Operand 17660 states and 44713 transitions. [2021-06-05 03:55:41,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 03:55:41,478 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:41,478 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:41,678 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 495 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1035 [2021-06-05 03:55:41,679 INFO L430 AbstractCegarLoop]: === Iteration 504 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:41,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:41,679 INFO L82 PathProgramCache]: Analyzing trace with hash 1773966259, now seen corresponding path program 303 times [2021-06-05 03:55:41,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:41,679 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640401502] [2021-06-05 03:55:41,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:41,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:41,793 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 157 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:55:41,793 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:41,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640401502] [2021-06-05 03:55:41,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640401502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:41,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393401232] [2021-06-05 03:55:41,793 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 496 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 496 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:41,823 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-06-05 03:55:41,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:41,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 03:55:41,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:41,900 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 158 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:55:41,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393401232] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:41,900 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:41,900 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 03:55:41,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084619311] [2021-06-05 03:55:41,900 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:55:41,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:41,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:55:41,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:55:41,901 INFO L87 Difference]: Start difference. First operand 17660 states and 44713 transitions. Second operand has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:44,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:44,810 INFO L93 Difference]: Finished difference Result 57125 states and 132657 transitions. [2021-06-05 03:55:44,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 161 states. [2021-06-05 03:55:44,811 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 03:55:44,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:44,879 INFO L225 Difference]: With dead ends: 57125 [2021-06-05 03:55:44,880 INFO L226 Difference]: Without dead ends: 55739 [2021-06-05 03:55:44,881 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10598 ImplicationChecksByTransitivity, 2010.2ms TimeCoverageRelationStatistics Valid=1947, Invalid=23813, Unknown=0, NotChecked=0, Total=25760 [2021-06-05 03:55:44,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55739 states. [2021-06-05 03:55:45,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55739 to 20191. [2021-06-05 03:55:45,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20191 states, 20190 states have (on average 2.5379891035165922) internal successors, (51242), 20190 states have internal predecessors, (51242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:45,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20191 states to 20191 states and 51242 transitions. [2021-06-05 03:55:45,348 INFO L78 Accepts]: Start accepts. Automaton has 20191 states and 51242 transitions. Word has length 59 [2021-06-05 03:55:45,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:45,348 INFO L482 AbstractCegarLoop]: Abstraction has 20191 states and 51242 transitions. [2021-06-05 03:55:45,348 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:45,348 INFO L276 IsEmpty]: Start isEmpty. Operand 20191 states and 51242 transitions. [2021-06-05 03:55:45,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 03:55:45,358 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:45,358 INFO L521 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:45,558 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1041,496 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:45,558 INFO L430 AbstractCegarLoop]: === Iteration 505 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:45,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:45,559 INFO L82 PathProgramCache]: Analyzing trace with hash -1771583384, now seen corresponding path program 304 times [2021-06-05 03:55:45,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:45,559 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726550727] [2021-06-05 03:55:45,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:45,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:45,660 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 49 proven. 128 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:55:45,660 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:45,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726550727] [2021-06-05 03:55:45,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726550727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:45,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736882104] [2021-06-05 03:55:45,660 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 497 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 497 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:45,685 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:55:45,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:45,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 03:55:45,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:45,768 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 49 proven. 128 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:55:45,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736882104] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:45,768 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:45,768 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-06-05 03:55:45,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585174039] [2021-06-05 03:55:45,769 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:55:45,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:45,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:55:45,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:55:45,769 INFO L87 Difference]: Start difference. First operand 20191 states and 51242 transitions. Second operand has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:46,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:46,072 INFO L93 Difference]: Finished difference Result 24224 states and 58607 transitions. [2021-06-05 03:55:46,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 03:55:46,072 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 03:55:46,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:46,097 INFO L225 Difference]: With dead ends: 24224 [2021-06-05 03:55:46,098 INFO L226 Difference]: Without dead ends: 24173 [2021-06-05 03:55:46,098 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 138.5ms TimeCoverageRelationStatistics Valid=152, Invalid=310, Unknown=0, NotChecked=0, Total=462 [2021-06-05 03:55:46,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24173 states. [2021-06-05 03:55:46,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24173 to 20191. [2021-06-05 03:55:46,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20191 states, 20190 states have (on average 2.53754333828628) internal successors, (51233), 20190 states have internal predecessors, (51233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:46,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20191 states to 20191 states and 51233 transitions. [2021-06-05 03:55:46,422 INFO L78 Accepts]: Start accepts. Automaton has 20191 states and 51233 transitions. Word has length 59 [2021-06-05 03:55:46,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:46,422 INFO L482 AbstractCegarLoop]: Abstraction has 20191 states and 51233 transitions. [2021-06-05 03:55:46,423 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:46,423 INFO L276 IsEmpty]: Start isEmpty. Operand 20191 states and 51233 transitions. [2021-06-05 03:55:46,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 03:55:46,434 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:46,434 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:46,634 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1042,497 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:46,634 INFO L430 AbstractCegarLoop]: === Iteration 506 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:46,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:46,634 INFO L82 PathProgramCache]: Analyzing trace with hash -49180099, now seen corresponding path program 305 times [2021-06-05 03:55:46,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:46,635 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952604339] [2021-06-05 03:55:46,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:46,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:46,760 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 157 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:55:46,760 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:46,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952604339] [2021-06-05 03:55:46,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952604339] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:46,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158479833] [2021-06-05 03:55:46,760 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 498 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 498 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:46,791 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-06-05 03:55:46,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:46,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 03:55:46,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:46,867 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 158 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:55:46,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158479833] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:46,867 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:46,867 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-06-05 03:55:46,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608874130] [2021-06-05 03:55:46,867 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 03:55:46,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:46,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 03:55:46,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:55:46,868 INFO L87 Difference]: Start difference. First operand 20191 states and 51233 transitions. Second operand has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:51,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:51,651 INFO L93 Difference]: Finished difference Result 72936 states and 170877 transitions. [2021-06-05 03:55:51,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 257 states. [2021-06-05 03:55:51,651 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 03:55:51,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:51,737 INFO L225 Difference]: With dead ends: 72936 [2021-06-05 03:55:51,737 INFO L226 Difference]: Without dead ends: 71616 [2021-06-05 03:55:51,740 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 255 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29073 ImplicationChecksByTransitivity, 3772.3ms TimeCoverageRelationStatistics Valid=4377, Invalid=61415, Unknown=0, NotChecked=0, Total=65792 [2021-06-05 03:55:51,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71616 states. [2021-06-05 03:55:52,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71616 to 22239. [2021-06-05 03:55:52,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22239 states, 22238 states have (on average 2.5387624786401655) internal successors, (56457), 22238 states have internal predecessors, (56457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:52,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22239 states to 22239 states and 56457 transitions. [2021-06-05 03:55:52,311 INFO L78 Accepts]: Start accepts. Automaton has 22239 states and 56457 transitions. Word has length 59 [2021-06-05 03:55:52,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:52,311 INFO L482 AbstractCegarLoop]: Abstraction has 22239 states and 56457 transitions. [2021-06-05 03:55:52,312 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:52,312 INFO L276 IsEmpty]: Start isEmpty. Operand 22239 states and 56457 transitions. [2021-06-05 03:55:52,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 03:55:52,322 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:52,322 INFO L521 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:52,522 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1049,498 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:52,522 INFO L430 AbstractCegarLoop]: === Iteration 507 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:52,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:52,523 INFO L82 PathProgramCache]: Analyzing trace with hash 32658754, now seen corresponding path program 306 times [2021-06-05 03:55:52,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:52,523 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41684474] [2021-06-05 03:55:52,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:52,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:52,661 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 59 proven. 118 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:55:52,661 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:52,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41684474] [2021-06-05 03:55:52,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41684474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:52,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083592778] [2021-06-05 03:55:52,661 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 499 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 499 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:52,691 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-05 03:55:52,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:52,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 03:55:52,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:52,769 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 59 proven. 118 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:55:52,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083592778] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:52,770 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:52,770 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2021-06-05 03:55:52,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576491296] [2021-06-05 03:55:52,770 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 03:55:52,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:52,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 03:55:52,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:55:52,770 INFO L87 Difference]: Start difference. First operand 22239 states and 56457 transitions. Second operand has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:53,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:53,064 INFO L93 Difference]: Finished difference Result 26451 states and 64189 transitions. [2021-06-05 03:55:53,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 03:55:53,064 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 03:55:53,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:53,094 INFO L225 Difference]: With dead ends: 26451 [2021-06-05 03:55:53,094 INFO L226 Difference]: Without dead ends: 26391 [2021-06-05 03:55:53,095 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 178.0ms TimeCoverageRelationStatistics Valid=177, Invalid=375, Unknown=0, NotChecked=0, Total=552 [2021-06-05 03:55:53,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26391 states. [2021-06-05 03:55:53,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26391 to 21958. [2021-06-05 03:55:53,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21958 states, 21957 states have (on average 2.5370041444641798) internal successors, (55705), 21957 states have internal predecessors, (55705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:53,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21958 states to 21958 states and 55705 transitions. [2021-06-05 03:55:53,444 INFO L78 Accepts]: Start accepts. Automaton has 21958 states and 55705 transitions. Word has length 59 [2021-06-05 03:55:53,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:53,444 INFO L482 AbstractCegarLoop]: Abstraction has 21958 states and 55705 transitions. [2021-06-05 03:55:53,444 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:53,444 INFO L276 IsEmpty]: Start isEmpty. Operand 21958 states and 55705 transitions. [2021-06-05 03:55:53,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 03:55:53,455 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:53,455 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:53,655 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1050,499 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:53,655 INFO L430 AbstractCegarLoop]: === Iteration 508 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:53,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:53,656 INFO L82 PathProgramCache]: Analyzing trace with hash 754093939, now seen corresponding path program 307 times [2021-06-05 03:55:53,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:53,656 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683686966] [2021-06-05 03:55:53,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:53,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:53,811 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 160 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:55:53,811 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:53,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683686966] [2021-06-05 03:55:53,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683686966] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:53,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066226792] [2021-06-05 03:55:53,811 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 500 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 500 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:53,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:53,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 03:55:53,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:53,913 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 160 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:55:53,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066226792] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:53,914 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:53,914 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2021-06-05 03:55:53,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079747425] [2021-06-05 03:55:53,914 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 03:55:53,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:53,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 03:55:53,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2021-06-05 03:55:53,914 INFO L87 Difference]: Start difference. First operand 21958 states and 55705 transitions. Second operand has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 17 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:54,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:54,791 INFO L93 Difference]: Finished difference Result 30778 states and 73104 transitions. [2021-06-05 03:55:54,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 03:55:54,791 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 17 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 03:55:54,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:54,824 INFO L225 Difference]: With dead ends: 30778 [2021-06-05 03:55:54,824 INFO L226 Difference]: Without dead ends: 28996 [2021-06-05 03:55:54,824 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 58 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 409.0ms TimeCoverageRelationStatistics Valid=224, Invalid=1182, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 03:55:54,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28996 states. [2021-06-05 03:55:55,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28996 to 14128. [2021-06-05 03:55:55,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14128 states, 14127 states have (on average 2.5023713456501735) internal successors, (35351), 14127 states have internal predecessors, (35351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:55,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14128 states to 14128 states and 35351 transitions. [2021-06-05 03:55:55,061 INFO L78 Accepts]: Start accepts. Automaton has 14128 states and 35351 transitions. Word has length 59 [2021-06-05 03:55:55,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:55,061 INFO L482 AbstractCegarLoop]: Abstraction has 14128 states and 35351 transitions. [2021-06-05 03:55:55,061 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 17 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:55,061 INFO L276 IsEmpty]: Start isEmpty. Operand 14128 states and 35351 transitions. [2021-06-05 03:55:55,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 03:55:55,070 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:55,070 INFO L521 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:55,270 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 500 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1058 [2021-06-05 03:55:55,270 INFO L430 AbstractCegarLoop]: === Iteration 509 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:55,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:55,270 INFO L82 PathProgramCache]: Analyzing trace with hash 516032422, now seen corresponding path program 143 times [2021-06-05 03:55:55,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:55,270 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904579258] [2021-06-05 03:55:55,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:55,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:55,335 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 128 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:55:55,335 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:55,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904579258] [2021-06-05 03:55:55,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904579258] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:55,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51601398] [2021-06-05 03:55:55,335 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 501 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 501 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:55,366 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-06-05 03:55:55,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:55,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 03:55:55,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:55,485 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 128 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:55:55,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51601398] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:55,486 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:55,486 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 20 [2021-06-05 03:55:55,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476893579] [2021-06-05 03:55:55,486 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 03:55:55,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:55,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 03:55:55,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=264, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:55:55,486 INFO L87 Difference]: Start difference. First operand 14128 states and 35351 transitions. Second operand has 21 states, 21 states have (on average 4.333333333333333) internal successors, (91), 20 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:55,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:55,791 INFO L93 Difference]: Finished difference Result 16812 states and 41038 transitions. [2021-06-05 03:55:55,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 03:55:55,792 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.333333333333333) internal successors, (91), 20 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 03:55:55,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:55,809 INFO L225 Difference]: With dead ends: 16812 [2021-06-05 03:55:55,810 INFO L226 Difference]: Without dead ends: 16798 [2021-06-05 03:55:55,810 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 115.9ms TimeCoverageRelationStatistics Valid=177, Invalid=329, Unknown=0, NotChecked=0, Total=506 [2021-06-05 03:55:55,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16798 states. [2021-06-05 03:55:55,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16798 to 14566. [2021-06-05 03:55:55,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14566 states, 14565 states have (on average 2.5051150017164434) internal successors, (36487), 14565 states have internal predecessors, (36487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:55,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14566 states to 14566 states and 36487 transitions. [2021-06-05 03:55:55,993 INFO L78 Accepts]: Start accepts. Automaton has 14566 states and 36487 transitions. Word has length 59 [2021-06-05 03:55:55,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:55,993 INFO L482 AbstractCegarLoop]: Abstraction has 14566 states and 36487 transitions. [2021-06-05 03:55:55,993 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 4.333333333333333) internal successors, (91), 20 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:55,994 INFO L276 IsEmpty]: Start isEmpty. Operand 14566 states and 36487 transitions. [2021-06-05 03:55:56,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 03:55:56,002 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:56,002 INFO L521 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:56,202 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 501 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1059 [2021-06-05 03:55:56,203 INFO L430 AbstractCegarLoop]: === Iteration 510 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:56,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:56,203 INFO L82 PathProgramCache]: Analyzing trace with hash -105847988, now seen corresponding path program 144 times [2021-06-05 03:55:56,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:56,203 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410054305] [2021-06-05 03:55:56,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:56,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:56,270 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 128 proven. 49 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:55:56,270 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:56,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410054305] [2021-06-05 03:55:56,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410054305] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:56,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132920058] [2021-06-05 03:55:56,271 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 502 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 502 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:56,301 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-06-05 03:55:56,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:56,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 03:55:56,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:56,441 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 129 proven. 49 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:55:56,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132920058] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:56,441 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:56,442 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 12 [2021-06-05 03:55:56,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663977654] [2021-06-05 03:55:56,442 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 03:55:56,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:56,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 03:55:56,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=89, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:55:56,442 INFO L87 Difference]: Start difference. First operand 14566 states and 36487 transitions. Second operand has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:56,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:56,722 INFO L93 Difference]: Finished difference Result 19427 states and 46843 transitions. [2021-06-05 03:55:56,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 03:55:56,722 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 03:55:56,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:56,741 INFO L225 Difference]: With dead ends: 19427 [2021-06-05 03:55:56,742 INFO L226 Difference]: Without dead ends: 19427 [2021-06-05 03:55:56,742 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 168.3ms TimeCoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2021-06-05 03:55:56,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19427 states. [2021-06-05 03:55:56,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19427 to 14571. [2021-06-05 03:55:56,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14571 states, 14570 states have (on average 2.5052848318462595) internal successors, (36502), 14570 states have internal predecessors, (36502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:56,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14571 states to 14571 states and 36502 transitions. [2021-06-05 03:55:56,933 INFO L78 Accepts]: Start accepts. Automaton has 14571 states and 36502 transitions. Word has length 59 [2021-06-05 03:55:56,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:56,933 INFO L482 AbstractCegarLoop]: Abstraction has 14571 states and 36502 transitions. [2021-06-05 03:55:56,933 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:56,934 INFO L276 IsEmpty]: Start isEmpty. Operand 14571 states and 36502 transitions. [2021-06-05 03:55:56,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 03:55:56,942 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:56,942 INFO L521 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:57,142 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 502 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1061 [2021-06-05 03:55:57,143 INFO L430 AbstractCegarLoop]: === Iteration 511 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:57,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:57,143 INFO L82 PathProgramCache]: Analyzing trace with hash -1743420444, now seen corresponding path program 145 times [2021-06-05 03:55:57,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:57,143 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290088530] [2021-06-05 03:55:57,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:57,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:57,218 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 128 proven. 49 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:55:57,219 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:57,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290088530] [2021-06-05 03:55:57,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290088530] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:57,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642189298] [2021-06-05 03:55:57,219 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 503 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 503 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:57,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:57,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 03:55:57,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:57,328 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 129 proven. 49 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:55:57,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642189298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:57,328 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:57,328 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2021-06-05 03:55:57,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880089596] [2021-06-05 03:55:57,328 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:55:57,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:57,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:55:57,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:55:57,329 INFO L87 Difference]: Start difference. First operand 14571 states and 36502 transitions. Second operand has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:57,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:57,711 INFO L93 Difference]: Finished difference Result 21523 states and 51587 transitions. [2021-06-05 03:55:57,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 03:55:57,711 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 03:55:57,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:57,735 INFO L225 Difference]: With dead ends: 21523 [2021-06-05 03:55:57,735 INFO L226 Difference]: Without dead ends: 21523 [2021-06-05 03:55:57,736 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 171.0ms TimeCoverageRelationStatistics Valid=272, Invalid=430, Unknown=0, NotChecked=0, Total=702 [2021-06-05 03:55:57,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21523 states. [2021-06-05 03:55:57,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21523 to 14590. [2021-06-05 03:55:57,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14590 states, 14589 states have (on average 2.506134759065049) internal successors, (36562), 14589 states have internal predecessors, (36562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:57,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14590 states to 14590 states and 36562 transitions. [2021-06-05 03:55:57,941 INFO L78 Accepts]: Start accepts. Automaton has 14590 states and 36562 transitions. Word has length 59 [2021-06-05 03:55:57,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:57,941 INFO L482 AbstractCegarLoop]: Abstraction has 14590 states and 36562 transitions. [2021-06-05 03:55:57,941 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:57,941 INFO L276 IsEmpty]: Start isEmpty. Operand 14590 states and 36562 transitions. [2021-06-05 03:55:57,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 03:55:57,950 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:57,950 INFO L521 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:58,150 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1062,503 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:58,150 INFO L430 AbstractCegarLoop]: === Iteration 512 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:58,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:58,150 INFO L82 PathProgramCache]: Analyzing trace with hash 861551688, now seen corresponding path program 146 times [2021-06-05 03:55:58,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:58,151 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956393411] [2021-06-05 03:55:58,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:58,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:58,236 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 124 proven. 53 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:55:58,236 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:58,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956393411] [2021-06-05 03:55:58,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956393411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:58,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943876715] [2021-06-05 03:55:58,236 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 504 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 504 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:58,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:55:58,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:58,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 03:55:58,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:58,348 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 125 proven. 53 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:55:58,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943876715] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:58,349 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:58,349 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 14 [2021-06-05 03:55:58,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270118325] [2021-06-05 03:55:58,349 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 03:55:58,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:58,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 03:55:58,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:55:58,349 INFO L87 Difference]: Start difference. First operand 14590 states and 36562 transitions. Second operand has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:58,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:58,795 INFO L93 Difference]: Finished difference Result 22499 states and 53828 transitions. [2021-06-05 03:55:58,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 03:55:58,795 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 03:55:58,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:58,818 INFO L225 Difference]: With dead ends: 22499 [2021-06-05 03:55:58,818 INFO L226 Difference]: Without dead ends: 22499 [2021-06-05 03:55:58,819 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 223.1ms TimeCoverageRelationStatistics Valid=375, Invalid=617, Unknown=0, NotChecked=0, Total=992 [2021-06-05 03:55:58,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22499 states. [2021-06-05 03:55:58,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22499 to 14615. [2021-06-05 03:55:59,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14615 states, 14614 states have (on average 2.507184891200219) internal successors, (36640), 14614 states have internal predecessors, (36640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:59,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14615 states to 14615 states and 36640 transitions. [2021-06-05 03:55:59,027 INFO L78 Accepts]: Start accepts. Automaton has 14615 states and 36640 transitions. Word has length 59 [2021-06-05 03:55:59,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:59,027 INFO L482 AbstractCegarLoop]: Abstraction has 14615 states and 36640 transitions. [2021-06-05 03:55:59,027 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:59,027 INFO L276 IsEmpty]: Start isEmpty. Operand 14615 states and 36640 transitions. [2021-06-05 03:55:59,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 03:55:59,036 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:59,036 INFO L521 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:59,236 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1063,504 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:59,236 INFO L430 AbstractCegarLoop]: === Iteration 513 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:59,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:59,237 INFO L82 PathProgramCache]: Analyzing trace with hash -177735324, now seen corresponding path program 147 times [2021-06-05 03:55:59,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:59,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361623280] [2021-06-05 03:55:59,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:59,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:59,332 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 120 proven. 57 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:55:59,332 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:59,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361623280] [2021-06-05 03:55:59,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361623280] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:59,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945918474] [2021-06-05 03:55:59,333 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 505 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 505 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:59,363 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-06-05 03:55:59,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:59,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 03:55:59,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:59,501 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 121 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:55:59,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945918474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:59,501 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:59,501 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 15 [2021-06-05 03:55:59,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131135486] [2021-06-05 03:55:59,501 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:55:59,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:59,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:55:59,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:55:59,502 INFO L87 Difference]: Start difference. First operand 14615 states and 36640 transitions. Second operand has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:00,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:56:00,073 INFO L93 Difference]: Finished difference Result 22401 states and 53647 transitions. [2021-06-05 03:56:00,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 03:56:00,073 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 03:56:00,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:56:00,096 INFO L225 Difference]: With dead ends: 22401 [2021-06-05 03:56:00,096 INFO L226 Difference]: Without dead ends: 22401 [2021-06-05 03:56:00,096 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 256.5ms TimeCoverageRelationStatistics Valid=448, Invalid=742, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 03:56:00,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22401 states. [2021-06-05 03:56:00,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22401 to 14646. [2021-06-05 03:56:00,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14646 states, 14645 states have (on average 2.508432912256743) internal successors, (36736), 14645 states have internal predecessors, (36736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:00,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14646 states to 14646 states and 36736 transitions. [2021-06-05 03:56:00,296 INFO L78 Accepts]: Start accepts. Automaton has 14646 states and 36736 transitions. Word has length 59 [2021-06-05 03:56:00,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:56:00,296 INFO L482 AbstractCegarLoop]: Abstraction has 14646 states and 36736 transitions. [2021-06-05 03:56:00,296 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:00,296 INFO L276 IsEmpty]: Start isEmpty. Operand 14646 states and 36736 transitions. [2021-06-05 03:56:00,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 03:56:00,305 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:56:00,305 INFO L521 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:56:00,505 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1064,505 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:00,505 INFO L430 AbstractCegarLoop]: === Iteration 514 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:56:00,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:56:00,505 INFO L82 PathProgramCache]: Analyzing trace with hash 842127048, now seen corresponding path program 148 times [2021-06-05 03:56:00,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:56:00,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766983681] [2021-06-05 03:56:00,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:56:00,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:00,611 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 116 proven. 61 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:56:00,611 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:56:00,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766983681] [2021-06-05 03:56:00,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766983681] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:00,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650142261] [2021-06-05 03:56:00,612 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 506 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 506 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:00,637 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:56:00,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:56:00,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 03:56:00,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:56:00,722 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 117 proven. 61 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:56:00,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650142261] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:00,723 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:56:00,723 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 16 [2021-06-05 03:56:00,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442738411] [2021-06-05 03:56:00,723 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 03:56:00,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:56:00,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 03:56:00,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:56:00,723 INFO L87 Difference]: Start difference. First operand 14646 states and 36736 transitions. Second operand has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 16 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:01,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:56:01,261 INFO L93 Difference]: Finished difference Result 21283 states and 51152 transitions. [2021-06-05 03:56:01,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 03:56:01,261 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 16 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 03:56:01,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:56:01,283 INFO L225 Difference]: With dead ends: 21283 [2021-06-05 03:56:01,283 INFO L226 Difference]: Without dead ends: 21283 [2021-06-05 03:56:01,284 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 276.2ms TimeCoverageRelationStatistics Valid=473, Invalid=787, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 03:56:01,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21283 states. [2021-06-05 03:56:01,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21283 to 14683. [2021-06-05 03:56:01,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14683 states, 14682 states have (on average 2.5098760386868273) internal successors, (36850), 14682 states have internal predecessors, (36850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:01,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14683 states to 14683 states and 36850 transitions. [2021-06-05 03:56:01,488 INFO L78 Accepts]: Start accepts. Automaton has 14683 states and 36850 transitions. Word has length 59 [2021-06-05 03:56:01,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:56:01,488 INFO L482 AbstractCegarLoop]: Abstraction has 14683 states and 36850 transitions. [2021-06-05 03:56:01,488 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 16 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:01,488 INFO L276 IsEmpty]: Start isEmpty. Operand 14683 states and 36850 transitions. [2021-06-05 03:56:01,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 03:56:01,497 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:56:01,497 INFO L521 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:56:01,697 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1065,506 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:01,697 INFO L430 AbstractCegarLoop]: === Iteration 515 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:56:01,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:56:01,698 INFO L82 PathProgramCache]: Analyzing trace with hash 963399396, now seen corresponding path program 149 times [2021-06-05 03:56:01,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:56:01,698 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397803892] [2021-06-05 03:56:01,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:56:01,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:01,817 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 112 proven. 65 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:56:01,817 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:56:01,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397803892] [2021-06-05 03:56:01,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397803892] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:01,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986205863] [2021-06-05 03:56:01,817 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 507 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 507 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:01,849 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-06-05 03:56:01,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:56:01,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 03:56:01,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:56:01,992 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 113 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:56:01,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986205863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:01,992 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:56:01,992 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 25 [2021-06-05 03:56:01,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034300253] [2021-06-05 03:56:01,992 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 03:56:01,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:56:01,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 03:56:01,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=469, Unknown=0, NotChecked=0, Total=650 [2021-06-05 03:56:01,993 INFO L87 Difference]: Start difference. First operand 14683 states and 36850 transitions. Second operand has 26 states, 26 states have (on average 3.5) internal successors, (91), 25 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:02,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:56:02,651 INFO L93 Difference]: Finished difference Result 19401 states and 46815 transitions. [2021-06-05 03:56:02,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 03:56:02,651 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.5) internal successors, (91), 25 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 03:56:02,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:56:02,671 INFO L225 Difference]: With dead ends: 19401 [2021-06-05 03:56:02,671 INFO L226 Difference]: Without dead ends: 19401 [2021-06-05 03:56:02,671 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 342.0ms TimeCoverageRelationStatistics Valid=617, Invalid=1189, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 03:56:02,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19401 states. [2021-06-05 03:56:02,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19401 to 14710. [2021-06-05 03:56:02,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14710 states, 14709 states have (on average 2.5105717587871372) internal successors, (36928), 14709 states have internal predecessors, (36928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:02,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14710 states to 14710 states and 36928 transitions. [2021-06-05 03:56:02,897 INFO L78 Accepts]: Start accepts. Automaton has 14710 states and 36928 transitions. Word has length 59 [2021-06-05 03:56:02,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:56:02,898 INFO L482 AbstractCegarLoop]: Abstraction has 14710 states and 36928 transitions. [2021-06-05 03:56:02,898 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 3.5) internal successors, (91), 25 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:02,898 INFO L276 IsEmpty]: Start isEmpty. Operand 14710 states and 36928 transitions. [2021-06-05 03:56:02,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 03:56:02,907 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:56:02,907 INFO L521 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:56:03,107 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 507 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1066 [2021-06-05 03:56:03,107 INFO L430 AbstractCegarLoop]: === Iteration 516 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:56:03,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:56:03,107 INFO L82 PathProgramCache]: Analyzing trace with hash 1720422728, now seen corresponding path program 150 times [2021-06-05 03:56:03,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:56:03,107 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444869215] [2021-06-05 03:56:03,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:56:03,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:03,237 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 108 proven. 70 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:56:03,237 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:56:03,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444869215] [2021-06-05 03:56:03,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444869215] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:03,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331266811] [2021-06-05 03:56:03,237 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 508 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 508 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:03,268 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-06-05 03:56:03,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:56:03,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 03:56:03,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:56:03,354 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 109 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:03,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331266811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:03,354 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:56:03,354 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 18 [2021-06-05 03:56:03,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569719155] [2021-06-05 03:56:03,355 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:56:03,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:56:03,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:56:03,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:56:03,355 INFO L87 Difference]: Start difference. First operand 14710 states and 36928 transitions. Second operand has 19 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 18 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:03,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:56:03,808 INFO L93 Difference]: Finished difference Result 16916 states and 41381 transitions. [2021-06-05 03:56:03,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 03:56:03,808 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 18 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 03:56:03,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:56:03,826 INFO L225 Difference]: With dead ends: 16916 [2021-06-05 03:56:03,826 INFO L226 Difference]: Without dead ends: 16916 [2021-06-05 03:56:03,826 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 252.7ms TimeCoverageRelationStatistics Valid=347, Invalid=645, Unknown=0, NotChecked=0, Total=992 [2021-06-05 03:56:03,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16916 states. [2021-06-05 03:56:03,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16916 to 13840. [2021-06-05 03:56:03,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13840 states, 13839 states have (on average 2.5019148782426477) internal successors, (34624), 13839 states have internal predecessors, (34624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:04,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13840 states to 13840 states and 34624 transitions. [2021-06-05 03:56:04,003 INFO L78 Accepts]: Start accepts. Automaton has 13840 states and 34624 transitions. Word has length 59 [2021-06-05 03:56:04,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:56:04,003 INFO L482 AbstractCegarLoop]: Abstraction has 13840 states and 34624 transitions. [2021-06-05 03:56:04,003 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 18 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:04,003 INFO L276 IsEmpty]: Start isEmpty. Operand 13840 states and 34624 transitions. [2021-06-05 03:56:04,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 03:56:04,012 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:56:04,012 INFO L521 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:56:04,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1067,508 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:04,213 INFO L430 AbstractCegarLoop]: === Iteration 517 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:56:04,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:56:04,213 INFO L82 PathProgramCache]: Analyzing trace with hash -1305517528, now seen corresponding path program 308 times [2021-06-05 03:56:04,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:56:04,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410063499] [2021-06-05 03:56:04,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:56:04,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:04,337 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 76 proven. 102 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:56:04,337 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:56:04,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410063499] [2021-06-05 03:56:04,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410063499] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:04,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522039068] [2021-06-05 03:56:04,338 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 509 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 509 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:04,363 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:56:04,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:56:04,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 03:56:04,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:56:04,444 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 76 proven. 102 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:56:04,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522039068] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:04,444 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:56:04,445 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2021-06-05 03:56:04,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59687309] [2021-06-05 03:56:04,445 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 03:56:04,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:56:04,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 03:56:04,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-06-05 03:56:04,445 INFO L87 Difference]: Start difference. First operand 13840 states and 34624 transitions. Second operand has 18 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 17 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:04,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:56:04,752 INFO L93 Difference]: Finished difference Result 16377 states and 39177 transitions. [2021-06-05 03:56:04,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 03:56:04,752 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 17 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 03:56:04,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:56:04,767 INFO L225 Difference]: With dead ends: 16377 [2021-06-05 03:56:04,767 INFO L226 Difference]: Without dead ends: 16314 [2021-06-05 03:56:04,767 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 188.3ms TimeCoverageRelationStatistics Valid=204, Invalid=446, Unknown=0, NotChecked=0, Total=650 [2021-06-05 03:56:04,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16314 states. [2021-06-05 03:56:04,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16314 to 13849. [2021-06-05 03:56:04,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13849 states, 13848 states have (on average 2.500938763720393) internal successors, (34633), 13848 states have internal predecessors, (34633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:04,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13849 states to 13849 states and 34633 transitions. [2021-06-05 03:56:04,936 INFO L78 Accepts]: Start accepts. Automaton has 13849 states and 34633 transitions. Word has length 59 [2021-06-05 03:56:04,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:56:04,936 INFO L482 AbstractCegarLoop]: Abstraction has 13849 states and 34633 transitions. [2021-06-05 03:56:04,936 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 17 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:04,936 INFO L276 IsEmpty]: Start isEmpty. Operand 13849 states and 34633 transitions. [2021-06-05 03:56:04,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 03:56:04,944 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:56:04,944 INFO L521 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:56:05,145 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 509 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1068 [2021-06-05 03:56:05,145 INFO L430 AbstractCegarLoop]: === Iteration 518 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:56:05,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:56:05,145 INFO L82 PathProgramCache]: Analyzing trace with hash -290755390, now seen corresponding path program 309 times [2021-06-05 03:56:05,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:56:05,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301780710] [2021-06-05 03:56:05,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:56:05,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:05,275 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 90 proven. 87 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:56:05,275 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:56:05,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301780710] [2021-06-05 03:56:05,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301780710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:05,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407282274] [2021-06-05 03:56:05,275 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 510 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 510 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:05,306 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-06-05 03:56:05,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:56:05,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 03:56:05,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:56:05,389 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 90 proven. 87 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:56:05,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407282274] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:05,390 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:56:05,390 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2021-06-05 03:56:05,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60028126] [2021-06-05 03:56:05,390 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 03:56:05,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:56:05,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 03:56:05,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2021-06-05 03:56:05,390 INFO L87 Difference]: Start difference. First operand 13849 states and 34633 transitions. Second operand has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:05,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:56:05,818 INFO L93 Difference]: Finished difference Result 16221 states and 39411 transitions. [2021-06-05 03:56:05,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 03:56:05,819 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 03:56:05,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:56:05,835 INFO L225 Difference]: With dead ends: 16221 [2021-06-05 03:56:05,835 INFO L226 Difference]: Without dead ends: 16221 [2021-06-05 03:56:05,835 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 247.3ms TimeCoverageRelationStatistics Valid=324, Invalid=606, Unknown=0, NotChecked=0, Total=930 [2021-06-05 03:56:05,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16221 states. [2021-06-05 03:56:06,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16221 to 13663. [2021-06-05 03:56:06,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13663 states, 13662 states have (on average 2.506441223832528) internal successors, (34243), 13662 states have internal predecessors, (34243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:06,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13663 states to 13663 states and 34243 transitions. [2021-06-05 03:56:06,031 INFO L78 Accepts]: Start accepts. Automaton has 13663 states and 34243 transitions. Word has length 59 [2021-06-05 03:56:06,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:56:06,031 INFO L482 AbstractCegarLoop]: Abstraction has 13663 states and 34243 transitions. [2021-06-05 03:56:06,031 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:06,031 INFO L276 IsEmpty]: Start isEmpty. Operand 13663 states and 34243 transitions. [2021-06-05 03:56:06,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 03:56:06,040 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:56:06,040 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:56:06,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 510 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1077 [2021-06-05 03:56:06,240 INFO L430 AbstractCegarLoop]: === Iteration 519 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:56:06,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:56:06,240 INFO L82 PathProgramCache]: Analyzing trace with hash -1740888523, now seen corresponding path program 151 times [2021-06-05 03:56:06,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:56:06,240 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898084295] [2021-06-05 03:56:06,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:56:06,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:06,378 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 167 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:56:06,378 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:56:06,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898084295] [2021-06-05 03:56:06,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898084295] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:06,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450103462] [2021-06-05 03:56:06,379 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 511 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 511 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:06,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:06,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 03:56:06,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:56:06,481 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 167 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:56:06,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450103462] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:06,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:56:06,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2021-06-05 03:56:06,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698200329] [2021-06-05 03:56:06,482 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 03:56:06,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:56:06,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 03:56:06,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2021-06-05 03:56:06,482 INFO L87 Difference]: Start difference. First operand 13663 states and 34243 transitions. Second operand has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:07,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:56:07,237 INFO L93 Difference]: Finished difference Result 18431 states and 44151 transitions. [2021-06-05 03:56:07,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 03:56:07,238 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 03:56:07,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:56:07,255 INFO L225 Difference]: With dead ends: 18431 [2021-06-05 03:56:07,255 INFO L226 Difference]: Without dead ends: 18317 [2021-06-05 03:56:07,255 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 58 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 397.2ms TimeCoverageRelationStatistics Valid=224, Invalid=1182, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 03:56:07,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18317 states. [2021-06-05 03:56:07,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18317 to 13282. [2021-06-05 03:56:07,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13282 states, 13281 states have (on average 2.505157744145772) internal successors, (33271), 13281 states have internal predecessors, (33271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:07,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13282 states to 13282 states and 33271 transitions. [2021-06-05 03:56:07,437 INFO L78 Accepts]: Start accepts. Automaton has 13282 states and 33271 transitions. Word has length 59 [2021-06-05 03:56:07,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:56:07,438 INFO L482 AbstractCegarLoop]: Abstraction has 13282 states and 33271 transitions. [2021-06-05 03:56:07,438 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:07,438 INFO L276 IsEmpty]: Start isEmpty. Operand 13282 states and 33271 transitions. [2021-06-05 03:56:07,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 03:56:07,446 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:56:07,446 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:56:07,646 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 511 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1078 [2021-06-05 03:56:07,646 INFO L430 AbstractCegarLoop]: === Iteration 520 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:56:07,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:56:07,646 INFO L82 PathProgramCache]: Analyzing trace with hash 285880821, now seen corresponding path program 310 times [2021-06-05 03:56:07,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:56:07,647 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711507163] [2021-06-05 03:56:07,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:56:07,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:07,795 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 18 proven. 157 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:56:07,795 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:56:07,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711507163] [2021-06-05 03:56:07,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711507163] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:07,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757173834] [2021-06-05 03:56:07,795 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 512 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 512 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:07,825 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:56:07,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:56:07,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 03:56:07,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:56:08,081 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 15 proven. 160 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:56:08,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757173834] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:08,081 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:56:08,081 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 23 [2021-06-05 03:56:08,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085452420] [2021-06-05 03:56:08,081 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 03:56:08,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:56:08,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 03:56:08,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-06-05 03:56:08,082 INFO L87 Difference]: Start difference. First operand 13282 states and 33271 transitions. Second operand has 24 states, 24 states have (on average 3.375) internal successors, (81), 23 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:08,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:56:08,959 INFO L93 Difference]: Finished difference Result 13442 states and 33525 transitions. [2021-06-05 03:56:08,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 03:56:08,959 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.375) internal successors, (81), 23 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 03:56:08,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:56:08,974 INFO L225 Difference]: With dead ends: 13442 [2021-06-05 03:56:08,974 INFO L226 Difference]: Without dead ends: 13362 [2021-06-05 03:56:08,974 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 285.9ms TimeCoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-06-05 03:56:08,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13362 states. [2021-06-05 03:56:09,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13362 to 13282. [2021-06-05 03:56:09,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13282 states, 13281 states have (on average 2.5013176718620587) internal successors, (33220), 13281 states have internal predecessors, (33220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:09,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13282 states to 13282 states and 33220 transitions. [2021-06-05 03:56:09,125 INFO L78 Accepts]: Start accepts. Automaton has 13282 states and 33220 transitions. Word has length 59 [2021-06-05 03:56:09,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:56:09,125 INFO L482 AbstractCegarLoop]: Abstraction has 13282 states and 33220 transitions. [2021-06-05 03:56:09,125 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 3.375) internal successors, (81), 23 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:09,125 INFO L276 IsEmpty]: Start isEmpty. Operand 13282 states and 33220 transitions. [2021-06-05 03:56:09,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 03:56:09,132 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:56:09,133 INFO L521 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:56:09,333 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 512 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1079 [2021-06-05 03:56:09,333 INFO L430 AbstractCegarLoop]: === Iteration 521 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:56:09,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:56:09,333 INFO L82 PathProgramCache]: Analyzing trace with hash 233038186, now seen corresponding path program 311 times [2021-06-05 03:56:09,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:56:09,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306495772] [2021-06-05 03:56:09,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:56:09,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:09,448 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 88 proven. 89 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:56:09,448 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:56:09,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306495772] [2021-06-05 03:56:09,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306495772] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:09,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068382020] [2021-06-05 03:56:09,449 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 513 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 513 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:09,477 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-06-05 03:56:09,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:56:09,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 03:56:09,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:56:09,645 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 88 proven. 89 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:56:09,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068382020] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:09,646 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:56:09,646 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 27 [2021-06-05 03:56:09,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492920783] [2021-06-05 03:56:09,646 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 03:56:09,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:56:09,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 03:56:09,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=567, Unknown=0, NotChecked=0, Total=756 [2021-06-05 03:56:09,646 INFO L87 Difference]: Start difference. First operand 13282 states and 33220 transitions. Second operand has 28 states, 28 states have (on average 3.4642857142857144) internal successors, (97), 27 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:10,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:56:10,298 INFO L93 Difference]: Finished difference Result 16482 states and 39782 transitions. [2021-06-05 03:56:10,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 03:56:10,298 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.4642857142857144) internal successors, (97), 27 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 03:56:10,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:56:10,315 INFO L225 Difference]: With dead ends: 16482 [2021-06-05 03:56:10,315 INFO L226 Difference]: Without dead ends: 16482 [2021-06-05 03:56:10,315 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 363.5ms TimeCoverageRelationStatistics Valid=499, Invalid=1223, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 03:56:10,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16482 states. [2021-06-05 03:56:10,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16482 to 13694. [2021-06-05 03:56:10,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13694 states, 13693 states have (on average 2.5162491784123273) internal successors, (34455), 13693 states have internal predecessors, (34455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:10,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13694 states to 13694 states and 34455 transitions. [2021-06-05 03:56:10,487 INFO L78 Accepts]: Start accepts. Automaton has 13694 states and 34455 transitions. Word has length 59 [2021-06-05 03:56:10,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:56:10,487 INFO L482 AbstractCegarLoop]: Abstraction has 13694 states and 34455 transitions. [2021-06-05 03:56:10,487 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 3.4642857142857144) internal successors, (97), 27 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:10,487 INFO L276 IsEmpty]: Start isEmpty. Operand 13694 states and 34455 transitions. [2021-06-05 03:56:10,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 03:56:10,495 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:56:10,495 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:56:10,695 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1080,513 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:10,695 INFO L430 AbstractCegarLoop]: === Iteration 522 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:56:10,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:56:10,695 INFO L82 PathProgramCache]: Analyzing trace with hash -2141933289, now seen corresponding path program 152 times [2021-06-05 03:56:10,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:56:10,696 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360917104] [2021-06-05 03:56:10,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:56:10,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:10,818 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 167 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:56:10,818 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:56:10,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360917104] [2021-06-05 03:56:10,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360917104] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:10,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119920868] [2021-06-05 03:56:10,819 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 514 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 514 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:10,845 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:56:10,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:56:10,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 03:56:10,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:56:11,577 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 49 proven. 127 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:56:11,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119920868] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:11,578 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:56:11,578 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 33 [2021-06-05 03:56:11,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170062922] [2021-06-05 03:56:11,578 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 03:56:11,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:56:11,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 03:56:11,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1004, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 03:56:11,578 INFO L87 Difference]: Start difference. First operand 13694 states and 34455 transitions. Second operand has 34 states, 34 states have (on average 3.1470588235294117) internal successors, (107), 33 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:20,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:56:20,455 INFO L93 Difference]: Finished difference Result 28070 states and 65966 transitions. [2021-06-05 03:56:20,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 229 states. [2021-06-05 03:56:20,455 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.1470588235294117) internal successors, (107), 33 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 03:56:20,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:56:20,483 INFO L225 Difference]: With dead ends: 28070 [2021-06-05 03:56:20,483 INFO L226 Difference]: Without dead ends: 27508 [2021-06-05 03:56:20,485 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 245 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23843 ImplicationChecksByTransitivity, 7347.7ms TimeCoverageRelationStatistics Valid=7596, Invalid=53166, Unknown=0, NotChecked=0, Total=60762 [2021-06-05 03:56:20,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27508 states. [2021-06-05 03:56:20,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27508 to 13479. [2021-06-05 03:56:20,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13479 states, 13478 states have (on average 2.5634367116782903) internal successors, (34550), 13478 states have internal predecessors, (34550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:20,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13479 states to 13479 states and 34550 transitions. [2021-06-05 03:56:20,704 INFO L78 Accepts]: Start accepts. Automaton has 13479 states and 34550 transitions. Word has length 59 [2021-06-05 03:56:20,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:56:20,704 INFO L482 AbstractCegarLoop]: Abstraction has 13479 states and 34550 transitions. [2021-06-05 03:56:20,704 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 3.1470588235294117) internal successors, (107), 33 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:20,704 INFO L276 IsEmpty]: Start isEmpty. Operand 13479 states and 34550 transitions. [2021-06-05 03:56:20,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 03:56:20,712 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:56:20,712 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:56:20,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1081,514 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:20,912 INFO L430 AbstractCegarLoop]: === Iteration 523 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:56:20,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:56:20,913 INFO L82 PathProgramCache]: Analyzing trace with hash 229597463, now seen corresponding path program 312 times [2021-06-05 03:56:20,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:56:20,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755021006] [2021-06-05 03:56:20,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:56:20,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:21,049 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 18 proven. 157 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:56:21,049 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:56:21,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755021006] [2021-06-05 03:56:21,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755021006] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:21,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285742819] [2021-06-05 03:56:21,050 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 515 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 515 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:21,078 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-05 03:56:21,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:56:21,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 03:56:21,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:56:21,313 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 15 proven. 160 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:56:21,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285742819] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:21,313 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:56:21,313 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2021-06-05 03:56:21,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200868424] [2021-06-05 03:56:21,314 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 03:56:21,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:56:21,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 03:56:21,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-06-05 03:56:21,314 INFO L87 Difference]: Start difference. First operand 13479 states and 34550 transitions. Second operand has 22 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 21 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:22,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:56:22,022 INFO L93 Difference]: Finished difference Result 13564 states and 34688 transitions. [2021-06-05 03:56:22,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 03:56:22,022 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 21 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 03:56:22,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:56:22,036 INFO L225 Difference]: With dead ends: 13564 [2021-06-05 03:56:22,036 INFO L226 Difference]: Without dead ends: 13496 [2021-06-05 03:56:22,036 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 231.3ms TimeCoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-06-05 03:56:22,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13496 states. [2021-06-05 03:56:22,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13496 to 13479. [2021-06-05 03:56:22,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13479 states, 13478 states have (on average 2.561210862145719) internal successors, (34520), 13478 states have internal predecessors, (34520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:22,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13479 states to 13479 states and 34520 transitions. [2021-06-05 03:56:22,183 INFO L78 Accepts]: Start accepts. Automaton has 13479 states and 34520 transitions. Word has length 59 [2021-06-05 03:56:22,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:56:22,183 INFO L482 AbstractCegarLoop]: Abstraction has 13479 states and 34520 transitions. [2021-06-05 03:56:22,184 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 21 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:22,184 INFO L276 IsEmpty]: Start isEmpty. Operand 13479 states and 34520 transitions. [2021-06-05 03:56:22,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 03:56:22,191 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:56:22,191 INFO L521 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:56:22,391 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1091,515 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:22,392 INFO L430 AbstractCegarLoop]: === Iteration 524 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:56:22,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:56:22,392 INFO L82 PathProgramCache]: Analyzing trace with hash -1178079806, now seen corresponding path program 313 times [2021-06-05 03:56:22,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:56:22,392 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521693348] [2021-06-05 03:56:22,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:56:22,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:22,493 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 86 proven. 91 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:56:22,493 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:56:22,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521693348] [2021-06-05 03:56:22,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521693348] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:22,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614839877] [2021-06-05 03:56:22,493 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 516 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 516 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:22,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:22,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 03:56:22,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:56:22,603 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 86 proven. 91 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:56:22,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614839877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:22,603 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:56:22,603 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-06-05 03:56:22,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666961513] [2021-06-05 03:56:22,604 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:56:22,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:56:22,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:56:22,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:56:22,604 INFO L87 Difference]: Start difference. First operand 13479 states and 34520 transitions. Second operand has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:22,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:56:22,961 INFO L93 Difference]: Finished difference Result 16700 states and 41187 transitions. [2021-06-05 03:56:22,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 03:56:22,961 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 03:56:22,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:56:22,977 INFO L225 Difference]: With dead ends: 16700 [2021-06-05 03:56:22,978 INFO L226 Difference]: Without dead ends: 16700 [2021-06-05 03:56:22,978 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 167.9ms TimeCoverageRelationStatistics Valid=219, Invalid=381, Unknown=0, NotChecked=0, Total=600 [2021-06-05 03:56:22,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16700 states. [2021-06-05 03:56:23,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16700 to 14028. [2021-06-05 03:56:23,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14028 states, 14027 states have (on average 2.578099379767591) internal successors, (36163), 14027 states have internal predecessors, (36163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:23,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14028 states to 14028 states and 36163 transitions. [2021-06-05 03:56:23,155 INFO L78 Accepts]: Start accepts. Automaton has 14028 states and 36163 transitions. Word has length 59 [2021-06-05 03:56:23,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:56:23,155 INFO L482 AbstractCegarLoop]: Abstraction has 14028 states and 36163 transitions. [2021-06-05 03:56:23,155 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:23,156 INFO L276 IsEmpty]: Start isEmpty. Operand 14028 states and 36163 transitions. [2021-06-05 03:56:23,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 03:56:23,164 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:56:23,164 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:56:23,364 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1092,516 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:23,364 INFO L430 AbstractCegarLoop]: === Iteration 525 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:56:23,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:56:23,364 INFO L82 PathProgramCache]: Analyzing trace with hash 1136189813, now seen corresponding path program 153 times [2021-06-05 03:56:23,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:56:23,364 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083218180] [2021-06-05 03:56:23,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:56:23,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:23,478 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 167 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:56:23,478 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:56:23,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083218180] [2021-06-05 03:56:23,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083218180] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:23,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673578282] [2021-06-05 03:56:23,479 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 517 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 517 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:23,507 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-05 03:56:23,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:56:23,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 03:56:23,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:56:23,636 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 167 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:56:23,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673578282] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:23,637 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:56:23,637 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 03:56:23,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093506414] [2021-06-05 03:56:23,637 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:56:23,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:56:23,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:56:23,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:56:23,637 INFO L87 Difference]: Start difference. First operand 14028 states and 36163 transitions. Second operand has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:24,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:56:24,290 INFO L93 Difference]: Finished difference Result 19202 states and 47249 transitions. [2021-06-05 03:56:24,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 03:56:24,290 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 03:56:24,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:56:24,308 INFO L225 Difference]: With dead ends: 19202 [2021-06-05 03:56:24,308 INFO L226 Difference]: Without dead ends: 19070 [2021-06-05 03:56:24,308 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 336.3ms TimeCoverageRelationStatistics Valid=144, Invalid=848, Unknown=0, NotChecked=0, Total=992 [2021-06-05 03:56:24,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19070 states. [2021-06-05 03:56:24,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19070 to 13945. [2021-06-05 03:56:24,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13945 states, 13944 states have (on average 2.57723752151463) internal successors, (35937), 13944 states have internal predecessors, (35937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:24,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13945 states to 13945 states and 35937 transitions. [2021-06-05 03:56:24,501 INFO L78 Accepts]: Start accepts. Automaton has 13945 states and 35937 transitions. Word has length 59 [2021-06-05 03:56:24,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:56:24,501 INFO L482 AbstractCegarLoop]: Abstraction has 13945 states and 35937 transitions. [2021-06-05 03:56:24,501 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:24,501 INFO L276 IsEmpty]: Start isEmpty. Operand 13945 states and 35937 transitions. [2021-06-05 03:56:24,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 03:56:24,509 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:56:24,509 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:56:24,709 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1093,517 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:24,709 INFO L430 AbstractCegarLoop]: === Iteration 526 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:56:24,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:56:24,709 INFO L82 PathProgramCache]: Analyzing trace with hash 656626997, now seen corresponding path program 314 times [2021-06-05 03:56:24,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:56:24,710 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437799633] [2021-06-05 03:56:24,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:56:24,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:24,834 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 18 proven. 157 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:56:24,834 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:56:24,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437799633] [2021-06-05 03:56:24,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437799633] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:24,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587673608] [2021-06-05 03:56:24,835 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 518 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 518 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:24,862 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:56:24,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:56:24,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 03:56:24,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:56:25,047 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 15 proven. 160 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:56:25,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587673608] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:25,048 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:56:25,048 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-06-05 03:56:25,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042904357] [2021-06-05 03:56:25,048 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 03:56:25,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:56:25,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 03:56:25,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-06-05 03:56:25,048 INFO L87 Difference]: Start difference. First operand 13945 states and 35937 transitions. Second operand has 20 states, 20 states have (on average 3.75) internal successors, (75), 19 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:25,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:56:25,816 INFO L93 Difference]: Finished difference Result 14171 states and 36291 transitions. [2021-06-05 03:56:25,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 03:56:25,816 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.75) internal successors, (75), 19 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 03:56:25,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:56:25,830 INFO L225 Difference]: With dead ends: 14171 [2021-06-05 03:56:25,830 INFO L226 Difference]: Without dead ends: 14115 [2021-06-05 03:56:25,830 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 230.8ms TimeCoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-06-05 03:56:25,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14115 states. [2021-06-05 03:56:25,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14115 to 13945. [2021-06-05 03:56:25,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13945 states, 13944 states have (on average 2.5748709122203097) internal successors, (35904), 13944 states have internal predecessors, (35904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:25,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13945 states to 13945 states and 35904 transitions. [2021-06-05 03:56:25,989 INFO L78 Accepts]: Start accepts. Automaton has 13945 states and 35904 transitions. Word has length 59 [2021-06-05 03:56:25,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:56:25,989 INFO L482 AbstractCegarLoop]: Abstraction has 13945 states and 35904 transitions. [2021-06-05 03:56:25,989 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.75) internal successors, (75), 19 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:25,989 INFO L276 IsEmpty]: Start isEmpty. Operand 13945 states and 35904 transitions. [2021-06-05 03:56:25,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 03:56:25,997 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:56:25,997 INFO L521 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:56:26,197 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1094,518 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:26,197 INFO L430 AbstractCegarLoop]: === Iteration 527 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:56:26,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:56:26,198 INFO L82 PathProgramCache]: Analyzing trace with hash -1251305348, now seen corresponding path program 154 times [2021-06-05 03:56:26,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:56:26,198 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052895859] [2021-06-05 03:56:26,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:56:26,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:26,285 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 52 proven. 124 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:56:26,285 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:56:26,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052895859] [2021-06-05 03:56:26,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052895859] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:26,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103322051] [2021-06-05 03:56:26,285 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 519 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 519 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:26,310 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:56:26,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:56:26,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 03:56:26,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:56:26,394 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 53 proven. 124 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:56:26,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103322051] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:26,394 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:56:26,394 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 15 [2021-06-05 03:56:26,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809234356] [2021-06-05 03:56:26,395 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:56:26,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:56:26,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:56:26,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:56:26,395 INFO L87 Difference]: Start difference. First operand 13945 states and 35904 transitions. Second operand has 16 states, 16 states have (on average 3.875) internal successors, (62), 15 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:26,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:56:26,688 INFO L93 Difference]: Finished difference Result 16427 states and 40999 transitions. [2021-06-05 03:56:26,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 03:56:26,689 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 15 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 03:56:26,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:56:26,704 INFO L225 Difference]: With dead ends: 16427 [2021-06-05 03:56:26,705 INFO L226 Difference]: Without dead ends: 16325 [2021-06-05 03:56:26,705 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 127.4ms TimeCoverageRelationStatistics Valid=128, Invalid=292, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:56:26,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16325 states. [2021-06-05 03:56:26,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16325 to 12866. [2021-06-05 03:56:26,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12866 states, 12865 states have (on average 2.5769141080450835) internal successors, (33152), 12865 states have internal predecessors, (33152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:26,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12866 states to 12866 states and 33152 transitions. [2021-06-05 03:56:26,867 INFO L78 Accepts]: Start accepts. Automaton has 12866 states and 33152 transitions. Word has length 59 [2021-06-05 03:56:26,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:56:26,867 INFO L482 AbstractCegarLoop]: Abstraction has 12866 states and 33152 transitions. [2021-06-05 03:56:26,868 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 15 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:26,868 INFO L276 IsEmpty]: Start isEmpty. Operand 12866 states and 33152 transitions. [2021-06-05 03:56:26,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 03:56:26,927 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:56:26,927 INFO L521 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:56:27,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 519 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1095 [2021-06-05 03:56:27,128 INFO L430 AbstractCegarLoop]: === Iteration 528 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:56:27,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:56:27,128 INFO L82 PathProgramCache]: Analyzing trace with hash -151060374, now seen corresponding path program 315 times [2021-06-05 03:56:27,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:56:27,128 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59407639] [2021-06-05 03:56:27,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:56:27,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:27,215 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 84 proven. 93 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:56:27,215 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:56:27,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59407639] [2021-06-05 03:56:27,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59407639] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:27,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565870236] [2021-06-05 03:56:27,215 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 520 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 520 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:27,245 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-06-05 03:56:27,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:56:27,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 03:56:27,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:56:27,325 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 84 proven. 93 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:56:27,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565870236] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:27,325 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:56:27,325 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-06-05 03:56:27,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203759495] [2021-06-05 03:56:27,325 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 03:56:27,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:56:27,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 03:56:27,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:56:27,326 INFO L87 Difference]: Start difference. First operand 12866 states and 33152 transitions. Second operand has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:27,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:56:27,595 INFO L93 Difference]: Finished difference Result 16089 states and 39723 transitions. [2021-06-05 03:56:27,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 03:56:27,595 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 03:56:27,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:56:27,610 INFO L225 Difference]: With dead ends: 16089 [2021-06-05 03:56:27,611 INFO L226 Difference]: Without dead ends: 16089 [2021-06-05 03:56:27,611 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 132.4ms TimeCoverageRelationStatistics Valid=174, Invalid=288, Unknown=0, NotChecked=0, Total=462 [2021-06-05 03:56:27,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16089 states. [2021-06-05 03:56:27,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16089 to 13293. [2021-06-05 03:56:27,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13293 states, 13292 states have (on average 2.59043033403551) internal successors, (34432), 13292 states have internal predecessors, (34432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:27,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13293 states to 13293 states and 34432 transitions. [2021-06-05 03:56:27,781 INFO L78 Accepts]: Start accepts. Automaton has 13293 states and 34432 transitions. Word has length 59 [2021-06-05 03:56:27,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:56:27,781 INFO L482 AbstractCegarLoop]: Abstraction has 13293 states and 34432 transitions. [2021-06-05 03:56:27,781 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:27,781 INFO L276 IsEmpty]: Start isEmpty. Operand 13293 states and 34432 transitions. [2021-06-05 03:56:27,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 03:56:27,788 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:56:27,788 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:56:27,989 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 520 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1101 [2021-06-05 03:56:27,989 INFO L430 AbstractCegarLoop]: === Iteration 529 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:56:27,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:56:27,989 INFO L82 PathProgramCache]: Analyzing trace with hash 541310423, now seen corresponding path program 155 times [2021-06-05 03:56:27,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:56:27,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968758547] [2021-06-05 03:56:27,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:56:27,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:28,092 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 167 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:56:28,092 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:56:28,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968758547] [2021-06-05 03:56:28,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968758547] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:28,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043535865] [2021-06-05 03:56:28,093 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 521 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 521 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:28,121 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-05 03:56:28,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:56:28,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 03:56:28,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:56:28,198 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 167 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:56:28,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043535865] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:28,199 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:56:28,199 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 03:56:28,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14892502] [2021-06-05 03:56:28,199 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 03:56:28,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:56:28,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 03:56:28,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:56:28,199 INFO L87 Difference]: Start difference. First operand 13293 states and 34432 transitions. Second operand has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:28,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:56:28,798 INFO L93 Difference]: Finished difference Result 17164 states and 42755 transitions. [2021-06-05 03:56:28,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 03:56:28,798 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 03:56:28,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:56:28,815 INFO L225 Difference]: With dead ends: 17164 [2021-06-05 03:56:28,815 INFO L226 Difference]: Without dead ends: 17150 [2021-06-05 03:56:28,815 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 233.7ms TimeCoverageRelationStatistics Valid=113, Invalid=699, Unknown=0, NotChecked=0, Total=812 [2021-06-05 03:56:28,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17150 states. [2021-06-05 03:56:28,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17150 to 13291. [2021-06-05 03:56:28,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13291 states, 13290 states have (on average 2.593453724604966) internal successors, (34467), 13290 states have internal predecessors, (34467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:28,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13291 states to 13291 states and 34467 transitions. [2021-06-05 03:56:28,985 INFO L78 Accepts]: Start accepts. Automaton has 13291 states and 34467 transitions. Word has length 59 [2021-06-05 03:56:28,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:56:28,985 INFO L482 AbstractCegarLoop]: Abstraction has 13291 states and 34467 transitions. [2021-06-05 03:56:28,985 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:28,985 INFO L276 IsEmpty]: Start isEmpty. Operand 13291 states and 34467 transitions. [2021-06-05 03:56:28,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 03:56:28,993 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:56:28,993 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:56:29,193 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 521 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1102 [2021-06-05 03:56:29,193 INFO L430 AbstractCegarLoop]: === Iteration 530 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:56:29,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:56:29,193 INFO L82 PathProgramCache]: Analyzing trace with hash 379258327, now seen corresponding path program 316 times [2021-06-05 03:56:29,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:56:29,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096680866] [2021-06-05 03:56:29,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:56:29,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:29,306 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 18 proven. 157 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:56:29,306 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:56:29,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096680866] [2021-06-05 03:56:29,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096680866] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:29,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437895575] [2021-06-05 03:56:29,306 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 522 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 522 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:29,332 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:56:29,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:56:29,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 03:56:29,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:56:29,490 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 15 proven. 160 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:56:29,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437895575] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:29,490 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:56:29,490 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 17 [2021-06-05 03:56:29,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391501782] [2021-06-05 03:56:29,491 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 03:56:29,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:56:29,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 03:56:29,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 03:56:29,491 INFO L87 Difference]: Start difference. First operand 13291 states and 34467 transitions. Second operand has 18 states, 18 states have (on average 4.0) internal successors, (72), 17 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:30,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:56:30,082 INFO L93 Difference]: Finished difference Result 13395 states and 34626 transitions. [2021-06-05 03:56:30,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 03:56:30,082 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.0) internal successors, (72), 17 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 03:56:30,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:56:30,094 INFO L225 Difference]: With dead ends: 13395 [2021-06-05 03:56:30,095 INFO L226 Difference]: Without dead ends: 13351 [2021-06-05 03:56:30,095 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 58 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 170.5ms TimeCoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:56:30,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13351 states. [2021-06-05 03:56:30,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13351 to 13291. [2021-06-05 03:56:30,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13291 states, 13290 states have (on average 2.5927765237020317) internal successors, (34458), 13290 states have internal predecessors, (34458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:30,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13291 states to 13291 states and 34458 transitions. [2021-06-05 03:56:30,238 INFO L78 Accepts]: Start accepts. Automaton has 13291 states and 34458 transitions. Word has length 59 [2021-06-05 03:56:30,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:56:30,238 INFO L482 AbstractCegarLoop]: Abstraction has 13291 states and 34458 transitions. [2021-06-05 03:56:30,238 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.0) internal successors, (72), 17 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:30,238 INFO L276 IsEmpty]: Start isEmpty. Operand 13291 states and 34458 transitions. [2021-06-05 03:56:30,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 03:56:30,245 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:56:30,245 INFO L521 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:56:30,445 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1103,522 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:30,445 INFO L430 AbstractCegarLoop]: === Iteration 531 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:56:30,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:56:30,446 INFO L82 PathProgramCache]: Analyzing trace with hash -1601439350, now seen corresponding path program 156 times [2021-06-05 03:56:30,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:56:30,446 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684006802] [2021-06-05 03:56:30,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:56:30,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:30,582 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 63 proven. 114 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:56:30,583 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:56:30,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684006802] [2021-06-05 03:56:30,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684006802] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:30,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400359878] [2021-06-05 03:56:30,583 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 523 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 523 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:30,610 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-05 03:56:30,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:56:30,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 03:56:30,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:56:30,720 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 65 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:30,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400359878] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:30,720 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:56:30,720 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 19 [2021-06-05 03:56:30,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938496939] [2021-06-05 03:56:30,720 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 03:56:30,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:56:30,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 03:56:30,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2021-06-05 03:56:30,720 INFO L87 Difference]: Start difference. First operand 13291 states and 34458 transitions. Second operand has 20 states, 20 states have (on average 3.95) internal successors, (79), 19 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:31,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:56:31,018 INFO L93 Difference]: Finished difference Result 15297 states and 38508 transitions. [2021-06-05 03:56:31,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 03:56:31,019 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.95) internal successors, (79), 19 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 03:56:31,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:56:31,033 INFO L225 Difference]: With dead ends: 15297 [2021-06-05 03:56:31,033 INFO L226 Difference]: Without dead ends: 15243 [2021-06-05 03:56:31,033 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 142.4ms TimeCoverageRelationStatistics Valid=135, Invalid=417, Unknown=0, NotChecked=0, Total=552 [2021-06-05 03:56:31,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15243 states. [2021-06-05 03:56:31,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15243 to 13345. [2021-06-05 03:56:31,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13345 states, 13344 states have (on average 2.5953986810551557) internal successors, (34633), 13344 states have internal predecessors, (34633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:31,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13345 states to 13345 states and 34633 transitions. [2021-06-05 03:56:31,194 INFO L78 Accepts]: Start accepts. Automaton has 13345 states and 34633 transitions. Word has length 59 [2021-06-05 03:56:31,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:56:31,195 INFO L482 AbstractCegarLoop]: Abstraction has 13345 states and 34633 transitions. [2021-06-05 03:56:31,195 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.95) internal successors, (79), 19 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:31,195 INFO L276 IsEmpty]: Start isEmpty. Operand 13345 states and 34633 transitions. [2021-06-05 03:56:31,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 03:56:31,202 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:56:31,202 INFO L521 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:56:31,402 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 523 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1104 [2021-06-05 03:56:31,402 INFO L430 AbstractCegarLoop]: === Iteration 532 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:56:31,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:56:31,402 INFO L82 PathProgramCache]: Analyzing trace with hash 815345346, now seen corresponding path program 317 times [2021-06-05 03:56:31,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:56:31,403 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538019241] [2021-06-05 03:56:31,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:56:31,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:31,481 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 82 proven. 95 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:56:31,481 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:56:31,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538019241] [2021-06-05 03:56:31,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538019241] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:31,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727430233] [2021-06-05 03:56:31,482 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 524 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 524 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:31,510 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-06-05 03:56:31,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:56:31,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 03:56:31,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:56:31,610 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 84 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:31,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727430233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:31,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:56:31,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 16 [2021-06-05 03:56:31,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946344200] [2021-06-05 03:56:31,611 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 03:56:31,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:56:31,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 03:56:31,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:56:31,611 INFO L87 Difference]: Start difference. First operand 13345 states and 34633 transitions. Second operand has 17 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 16 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:31,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:56:31,908 INFO L93 Difference]: Finished difference Result 16957 states and 41994 transitions. [2021-06-05 03:56:31,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 03:56:31,909 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 16 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 03:56:31,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:56:31,925 INFO L225 Difference]: With dead ends: 16957 [2021-06-05 03:56:31,925 INFO L226 Difference]: Without dead ends: 16957 [2021-06-05 03:56:31,925 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 126.6ms TimeCoverageRelationStatistics Valid=173, Invalid=289, Unknown=0, NotChecked=0, Total=462 [2021-06-05 03:56:31,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16957 states. [2021-06-05 03:56:32,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16957 to 13816. [2021-06-05 03:56:32,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13816 states, 13815 states have (on average 2.607889974665219) internal successors, (36028), 13815 states have internal predecessors, (36028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:32,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13816 states to 13816 states and 36028 transitions. [2021-06-05 03:56:32,114 INFO L78 Accepts]: Start accepts. Automaton has 13816 states and 36028 transitions. Word has length 59 [2021-06-05 03:56:32,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:56:32,114 INFO L482 AbstractCegarLoop]: Abstraction has 13816 states and 36028 transitions. [2021-06-05 03:56:32,114 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 16 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:32,114 INFO L276 IsEmpty]: Start isEmpty. Operand 13816 states and 36028 transitions. [2021-06-05 03:56:32,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 03:56:32,122 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:56:32,122 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:56:32,322 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 524 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1110 [2021-06-05 03:56:32,322 INFO L430 AbstractCegarLoop]: === Iteration 533 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:56:32,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:56:32,322 INFO L82 PathProgramCache]: Analyzing trace with hash -1926034251, now seen corresponding path program 157 times [2021-06-05 03:56:32,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:56:32,323 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564756453] [2021-06-05 03:56:32,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:56:32,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:32,427 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 167 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:56:32,427 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:56:32,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564756453] [2021-06-05 03:56:32,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564756453] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:32,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758966791] [2021-06-05 03:56:32,427 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 525 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 525 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:32,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:32,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 03:56:32,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:56:32,529 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 167 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:56:32,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758966791] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:32,529 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:56:32,529 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 03:56:32,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477622545] [2021-06-05 03:56:32,529 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:56:32,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:56:32,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:56:32,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:56:32,530 INFO L87 Difference]: Start difference. First operand 13816 states and 36028 transitions. Second operand has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:33,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:56:33,083 INFO L93 Difference]: Finished difference Result 16406 states and 41478 transitions. [2021-06-05 03:56:33,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 03:56:33,083 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 03:56:33,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:56:33,099 INFO L225 Difference]: With dead ends: 16406 [2021-06-05 03:56:33,099 INFO L226 Difference]: Without dead ends: 16388 [2021-06-05 03:56:33,099 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 198.3ms TimeCoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2021-06-05 03:56:33,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16388 states. [2021-06-05 03:56:33,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16388 to 13495. [2021-06-05 03:56:33,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13495 states, 13494 states have (on average 2.6217578182896104) internal successors, (35378), 13494 states have internal predecessors, (35378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:33,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13495 states to 13495 states and 35378 transitions. [2021-06-05 03:56:33,263 INFO L78 Accepts]: Start accepts. Automaton has 13495 states and 35378 transitions. Word has length 59 [2021-06-05 03:56:33,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:56:33,263 INFO L482 AbstractCegarLoop]: Abstraction has 13495 states and 35378 transitions. [2021-06-05 03:56:33,263 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:33,263 INFO L276 IsEmpty]: Start isEmpty. Operand 13495 states and 35378 transitions. [2021-06-05 03:56:33,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 03:56:33,271 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:56:33,271 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:56:33,471 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 525 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1111 [2021-06-05 03:56:33,471 INFO L430 AbstractCegarLoop]: === Iteration 534 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:56:33,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:56:33,472 INFO L82 PathProgramCache]: Analyzing trace with hash -2102925195, now seen corresponding path program 318 times [2021-06-05 03:56:33,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:56:33,472 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949734924] [2021-06-05 03:56:33,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:56:33,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:33,573 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 18 proven. 157 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:56:33,573 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:56:33,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949734924] [2021-06-05 03:56:33,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949734924] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:33,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217662466] [2021-06-05 03:56:33,574 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 526 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 526 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:33,603 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-05 03:56:33,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:56:33,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 03:56:33,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:56:33,790 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 15 proven. 160 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:56:33,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217662466] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:33,790 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:56:33,790 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 15 [2021-06-05 03:56:33,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66039690] [2021-06-05 03:56:33,790 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:56:33,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:56:33,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:56:33,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:56:33,790 INFO L87 Difference]: Start difference. First operand 13495 states and 35378 transitions. Second operand has 16 states, 16 states have (on average 4.3125) internal successors, (69), 15 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:34,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:56:34,336 INFO L93 Difference]: Finished difference Result 13544 states and 35453 transitions. [2021-06-05 03:56:34,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 03:56:34,336 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.3125) internal successors, (69), 15 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 03:56:34,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:56:34,350 INFO L225 Difference]: With dead ends: 13544 [2021-06-05 03:56:34,350 INFO L226 Difference]: Without dead ends: 13512 [2021-06-05 03:56:34,351 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 129.3ms TimeCoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:56:34,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13512 states. [2021-06-05 03:56:34,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13512 to 13495. [2021-06-05 03:56:34,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13495 states, 13494 states have (on average 2.621313176226471) internal successors, (35372), 13494 states have internal predecessors, (35372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:34,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13495 states to 13495 states and 35372 transitions. [2021-06-05 03:56:34,498 INFO L78 Accepts]: Start accepts. Automaton has 13495 states and 35372 transitions. Word has length 59 [2021-06-05 03:56:34,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:56:34,498 INFO L482 AbstractCegarLoop]: Abstraction has 13495 states and 35372 transitions. [2021-06-05 03:56:34,498 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.3125) internal successors, (69), 15 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:34,498 INFO L276 IsEmpty]: Start isEmpty. Operand 13495 states and 35372 transitions. [2021-06-05 03:56:34,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 03:56:34,505 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:56:34,505 INFO L521 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:56:34,705 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 526 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1112 [2021-06-05 03:56:34,705 INFO L430 AbstractCegarLoop]: === Iteration 535 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:56:34,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:56:34,706 INFO L82 PathProgramCache]: Analyzing trace with hash 513630058, now seen corresponding path program 319 times [2021-06-05 03:56:34,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:56:34,706 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098732132] [2021-06-05 03:56:34,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:56:34,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:34,778 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 80 proven. 97 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:56:34,778 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:56:34,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098732132] [2021-06-05 03:56:34,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098732132] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:34,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334675027] [2021-06-05 03:56:34,778 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 527 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 527 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:34,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:34,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 03:56:34,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:56:34,900 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 121 proven. 56 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:56:34,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1334675027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:34,900 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:56:34,900 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-06-05 03:56:34,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780615590] [2021-06-05 03:56:34,900 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 03:56:34,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:56:34,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 03:56:34,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=125, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:56:34,900 INFO L87 Difference]: Start difference. First operand 13495 states and 35372 transitions. Second operand has 15 states, 15 states have (on average 4.4) internal successors, (66), 14 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:35,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:56:35,131 INFO L93 Difference]: Finished difference Result 16977 states and 42453 transitions. [2021-06-05 03:56:35,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 03:56:35,131 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.4) internal successors, (66), 14 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 03:56:35,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:56:35,147 INFO L225 Difference]: With dead ends: 16977 [2021-06-05 03:56:35,147 INFO L226 Difference]: Without dead ends: 16977 [2021-06-05 03:56:35,148 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 98.8ms TimeCoverageRelationStatistics Valid=128, Invalid=178, Unknown=0, NotChecked=0, Total=306 [2021-06-05 03:56:35,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16977 states. [2021-06-05 03:56:35,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16977 to 14002. [2021-06-05 03:56:35,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14002 states, 14001 states have (on average 2.633454753231912) internal successors, (36871), 14001 states have internal predecessors, (36871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:35,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14002 states to 14002 states and 36871 transitions. [2021-06-05 03:56:35,330 INFO L78 Accepts]: Start accepts. Automaton has 14002 states and 36871 transitions. Word has length 59 [2021-06-05 03:56:35,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:56:35,330 INFO L482 AbstractCegarLoop]: Abstraction has 14002 states and 36871 transitions. [2021-06-05 03:56:35,330 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.4) internal successors, (66), 14 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:35,331 INFO L276 IsEmpty]: Start isEmpty. Operand 14002 states and 36871 transitions. [2021-06-05 03:56:35,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 03:56:35,338 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:56:35,338 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:56:35,538 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 527 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1113 [2021-06-05 03:56:35,538 INFO L430 AbstractCegarLoop]: === Iteration 536 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:56:35,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:56:35,539 INFO L82 PathProgramCache]: Analyzing trace with hash -257205609, now seen corresponding path program 158 times [2021-06-05 03:56:35,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:56:35,539 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808123730] [2021-06-05 03:56:35,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:56:35,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:35,635 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 167 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:56:35,636 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:56:35,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808123730] [2021-06-05 03:56:35,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808123730] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:35,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638073350] [2021-06-05 03:56:35,636 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 528 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 528 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:35,662 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:56:35,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:56:35,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 03:56:35,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:56:35,742 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 167 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:56:35,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638073350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:35,742 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:56:35,742 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 03:56:35,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339896328] [2021-06-05 03:56:35,742 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 03:56:35,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:56:35,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 03:56:35,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:56:35,742 INFO L87 Difference]: Start difference. First operand 14002 states and 36871 transitions. Second operand has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:36,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:56:36,258 INFO L93 Difference]: Finished difference Result 15466 states and 39872 transitions. [2021-06-05 03:56:36,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 03:56:36,258 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 03:56:36,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:56:36,274 INFO L225 Difference]: With dead ends: 15466 [2021-06-05 03:56:36,274 INFO L226 Difference]: Without dead ends: 15466 [2021-06-05 03:56:36,274 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 164.5ms TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-06-05 03:56:36,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15466 states. [2021-06-05 03:56:36,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15466 to 14020. [2021-06-05 03:56:36,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14020 states, 14019 states have (on average 2.6337113916827164) internal successors, (36922), 14019 states have internal predecessors, (36922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:36,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14020 states to 14020 states and 36922 transitions. [2021-06-05 03:56:36,439 INFO L78 Accepts]: Start accepts. Automaton has 14020 states and 36922 transitions. Word has length 59 [2021-06-05 03:56:36,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:56:36,439 INFO L482 AbstractCegarLoop]: Abstraction has 14020 states and 36922 transitions. [2021-06-05 03:56:36,439 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:36,439 INFO L276 IsEmpty]: Start isEmpty. Operand 14020 states and 36922 transitions. [2021-06-05 03:56:36,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 03:56:36,446 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:56:36,446 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:56:36,646 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 528 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1116 [2021-06-05 03:56:36,647 INFO L430 AbstractCegarLoop]: === Iteration 537 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:56:36,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:56:36,647 INFO L82 PathProgramCache]: Analyzing trace with hash -1890501993, now seen corresponding path program 320 times [2021-06-05 03:56:36,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:56:36,647 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538298193] [2021-06-05 03:56:36,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:56:36,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:36,739 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 18 proven. 157 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:56:36,740 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:56:36,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538298193] [2021-06-05 03:56:36,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538298193] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:36,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186178151] [2021-06-05 03:56:36,740 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 529 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 529 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:36,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:56:36,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:56:36,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 03:56:36,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:56:36,877 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 15 proven. 160 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:56:36,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186178151] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:36,877 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:56:36,877 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-06-05 03:56:36,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067759572] [2021-06-05 03:56:36,878 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:56:36,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:56:36,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:56:36,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:56:36,878 INFO L87 Difference]: Start difference. First operand 14020 states and 36922 transitions. Second operand has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 13 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:37,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:56:37,282 INFO L93 Difference]: Finished difference Result 14088 states and 37021 transitions. [2021-06-05 03:56:37,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 03:56:37,282 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 13 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 03:56:37,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:56:37,296 INFO L225 Difference]: With dead ends: 14088 [2021-06-05 03:56:37,296 INFO L226 Difference]: Without dead ends: 14068 [2021-06-05 03:56:37,296 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 114.8ms TimeCoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:56:37,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14068 states. [2021-06-05 03:56:37,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14068 to 14020. [2021-06-05 03:56:37,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14020 states, 14019 states have (on average 2.6334973963906125) internal successors, (36919), 14019 states have internal predecessors, (36919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:37,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14020 states to 14020 states and 36919 transitions. [2021-06-05 03:56:37,459 INFO L78 Accepts]: Start accepts. Automaton has 14020 states and 36919 transitions. Word has length 59 [2021-06-05 03:56:37,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:56:37,459 INFO L482 AbstractCegarLoop]: Abstraction has 14020 states and 36919 transitions. [2021-06-05 03:56:37,459 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 13 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:37,459 INFO L276 IsEmpty]: Start isEmpty. Operand 14020 states and 36919 transitions. [2021-06-05 03:56:37,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 03:56:37,467 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:56:37,467 INFO L521 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:56:37,667 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1117,529 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:37,667 INFO L430 AbstractCegarLoop]: === Iteration 538 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:56:37,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:56:37,667 INFO L82 PathProgramCache]: Analyzing trace with hash -336914294, now seen corresponding path program 159 times [2021-06-05 03:56:37,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:56:37,667 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998269111] [2021-06-05 03:56:37,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:56:37,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:37,740 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 77 proven. 100 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:56:37,740 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:56:37,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998269111] [2021-06-05 03:56:37,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998269111] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:37,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554910302] [2021-06-05 03:56:37,740 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 530 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 530 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:37,768 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-05 03:56:37,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:56:37,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 03:56:37,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:56:37,849 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 78 proven. 100 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:56:37,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554910302] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:37,849 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:56:37,849 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2021-06-05 03:56:37,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608332277] [2021-06-05 03:56:37,849 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:56:37,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:56:37,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:56:37,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:56:37,849 INFO L87 Difference]: Start difference. First operand 14020 states and 36919 transitions. Second operand has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 13 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:38,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:56:38,047 INFO L93 Difference]: Finished difference Result 15125 states and 39073 transitions. [2021-06-05 03:56:38,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 03:56:38,047 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 13 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 03:56:38,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:56:38,062 INFO L225 Difference]: With dead ends: 15125 [2021-06-05 03:56:38,062 INFO L226 Difference]: Without dead ends: 15103 [2021-06-05 03:56:38,062 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 86.8ms TimeCoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:56:38,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15103 states. [2021-06-05 03:56:38,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15103 to 13957. [2021-06-05 03:56:38,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13957 states, 13956 states have (on average 2.635640584694755) internal successors, (36783), 13956 states have internal predecessors, (36783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:38,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13957 states to 13957 states and 36783 transitions. [2021-06-05 03:56:38,232 INFO L78 Accepts]: Start accepts. Automaton has 13957 states and 36783 transitions. Word has length 59 [2021-06-05 03:56:38,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:56:38,232 INFO L482 AbstractCegarLoop]: Abstraction has 13957 states and 36783 transitions. [2021-06-05 03:56:38,232 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 13 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:38,232 INFO L276 IsEmpty]: Start isEmpty. Operand 13957 states and 36783 transitions. [2021-06-05 03:56:38,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 03:56:38,239 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:56:38,239 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:56:38,440 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1118,530 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:38,440 INFO L430 AbstractCegarLoop]: === Iteration 539 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:56:38,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:56:38,440 INFO L82 PathProgramCache]: Analyzing trace with hash 1535027189, now seen corresponding path program 160 times [2021-06-05 03:56:38,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:56:38,440 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338154149] [2021-06-05 03:56:38,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:56:38,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:38,525 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 167 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:56:38,525 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:56:38,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338154149] [2021-06-05 03:56:38,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338154149] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:38,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077373251] [2021-06-05 03:56:38,525 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 531 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 531 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:38,550 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:56:38,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:56:38,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 03:56:38,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:56:38,628 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 167 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:56:38,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077373251] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:38,628 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:56:38,628 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 03:56:38,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932297779] [2021-06-05 03:56:38,629 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 03:56:38,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:56:38,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 03:56:38,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:56:38,629 INFO L87 Difference]: Start difference. First operand 13957 states and 36783 transitions. Second operand has 12 states, 12 states have (on average 5.0) internal successors, (60), 11 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:39,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:56:39,150 INFO L93 Difference]: Finished difference Result 14854 states and 38533 transitions. [2021-06-05 03:56:39,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 03:56:39,150 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 11 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 03:56:39,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:56:39,165 INFO L225 Difference]: With dead ends: 14854 [2021-06-05 03:56:39,165 INFO L226 Difference]: Without dead ends: 14846 [2021-06-05 03:56:39,165 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 134.4ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:56:39,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14846 states. [2021-06-05 03:56:39,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14846 to 14042. [2021-06-05 03:56:39,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14042 states, 14041 states have (on average 2.6336443273271133) internal successors, (36979), 14041 states have internal predecessors, (36979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:39,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14042 states to 14042 states and 36979 transitions. [2021-06-05 03:56:39,333 INFO L78 Accepts]: Start accepts. Automaton has 14042 states and 36979 transitions. Word has length 59 [2021-06-05 03:56:39,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:56:39,333 INFO L482 AbstractCegarLoop]: Abstraction has 14042 states and 36979 transitions. [2021-06-05 03:56:39,333 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 11 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:39,333 INFO L276 IsEmpty]: Start isEmpty. Operand 14042 states and 36979 transitions. [2021-06-05 03:56:39,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 03:56:39,341 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:56:39,341 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:56:39,541 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 531 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1122 [2021-06-05 03:56:39,541 INFO L430 AbstractCegarLoop]: === Iteration 540 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:56:39,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:56:39,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1259607115, now seen corresponding path program 321 times [2021-06-05 03:56:39,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:56:39,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576346808] [2021-06-05 03:56:39,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:56:39,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:39,621 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 19 proven. 156 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:56:39,621 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:56:39,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576346808] [2021-06-05 03:56:39,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576346808] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:39,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535559105] [2021-06-05 03:56:39,622 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 532 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 532 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:39,659 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-05 03:56:39,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:56:39,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 03:56:39,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:56:39,746 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 15 proven. 160 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:56:39,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535559105] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:39,746 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:56:39,746 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 03:56:39,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231856527] [2021-06-05 03:56:39,746 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 03:56:39,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:56:39,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 03:56:39,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:56:39,747 INFO L87 Difference]: Start difference. First operand 14042 states and 36979 transitions. Second operand has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 11 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:40,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:56:40,405 INFO L93 Difference]: Finished difference Result 14554 states and 37840 transitions. [2021-06-05 03:56:40,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 03:56:40,406 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 11 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 03:56:40,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:56:40,420 INFO L225 Difference]: With dead ends: 14554 [2021-06-05 03:56:40,420 INFO L226 Difference]: Without dead ends: 14403 [2021-06-05 03:56:40,420 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 135.6ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:56:40,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14403 states. [2021-06-05 03:56:40,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14403 to 13894. [2021-06-05 03:56:40,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13894 states, 13893 states have (on average 2.636723529835169) internal successors, (36632), 13893 states have internal predecessors, (36632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:40,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13894 states to 13894 states and 36632 transitions. [2021-06-05 03:56:40,604 INFO L78 Accepts]: Start accepts. Automaton has 13894 states and 36632 transitions. Word has length 59 [2021-06-05 03:56:40,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:56:40,604 INFO L482 AbstractCegarLoop]: Abstraction has 13894 states and 36632 transitions. [2021-06-05 03:56:40,604 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 11 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:40,604 INFO L276 IsEmpty]: Start isEmpty. Operand 13894 states and 36632 transitions. [2021-06-05 03:56:40,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 03:56:40,611 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:56:40,611 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:56:40,812 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 532 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1123 [2021-06-05 03:56:40,812 INFO L430 AbstractCegarLoop]: === Iteration 541 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:56:40,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:56:40,812 INFO L82 PathProgramCache]: Analyzing trace with hash -1873143295, now seen corresponding path program 322 times [2021-06-05 03:56:40,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:56:40,812 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468758893] [2021-06-05 03:56:40,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:56:40,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:40,898 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 157 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:56:40,898 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:56:40,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468758893] [2021-06-05 03:56:40,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468758893] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:40,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916602689] [2021-06-05 03:56:40,898 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 533 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 533 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:40,924 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:56:40,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:56:40,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 03:56:40,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:56:41,003 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 158 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:56:41,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916602689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:41,003 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:56:41,003 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 03:56:41,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463900729] [2021-06-05 03:56:41,003 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 03:56:41,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:56:41,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 03:56:41,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:56:41,004 INFO L87 Difference]: Start difference. First operand 13894 states and 36632 transitions. Second operand has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:41,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:56:41,464 INFO L93 Difference]: Finished difference Result 14649 states and 38103 transitions. [2021-06-05 03:56:41,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 03:56:41,464 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 03:56:41,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:56:41,479 INFO L225 Difference]: With dead ends: 14649 [2021-06-05 03:56:41,479 INFO L226 Difference]: Without dead ends: 14637 [2021-06-05 03:56:41,479 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 136.7ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:56:41,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14637 states. [2021-06-05 03:56:41,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14637 to 13896. [2021-06-05 03:56:41,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13896 states, 13895 states have (on average 2.6366318819719323) internal successors, (36636), 13895 states have internal predecessors, (36636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:41,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13896 states to 13896 states and 36636 transitions. [2021-06-05 03:56:41,657 INFO L78 Accepts]: Start accepts. Automaton has 13896 states and 36636 transitions. Word has length 59 [2021-06-05 03:56:41,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:56:41,657 INFO L482 AbstractCegarLoop]: Abstraction has 13896 states and 36636 transitions. [2021-06-05 03:56:41,657 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:41,657 INFO L276 IsEmpty]: Start isEmpty. Operand 13896 states and 36636 transitions. [2021-06-05 03:56:41,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 03:56:41,665 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:56:41,665 INFO L521 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:56:41,865 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 533 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1124 [2021-06-05 03:56:41,865 INFO L430 AbstractCegarLoop]: === Iteration 542 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:56:41,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:56:41,865 INFO L82 PathProgramCache]: Analyzing trace with hash 773466498, now seen corresponding path program 323 times [2021-06-05 03:56:41,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:56:41,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365513255] [2021-06-05 03:56:41,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:56:41,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:41,934 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 75 proven. 103 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:56:41,934 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:56:41,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365513255] [2021-06-05 03:56:41,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365513255] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:41,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133401896] [2021-06-05 03:56:41,934 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 534 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 534 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:41,963 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-05 03:56:41,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:56:41,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 03:56:41,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:56:42,059 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 76 proven. 103 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:42,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133401896] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:42,059 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:56:42,059 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 14 [2021-06-05 03:56:42,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938550093] [2021-06-05 03:56:42,059 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 03:56:42,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:56:42,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 03:56:42,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:56:42,060 INFO L87 Difference]: Start difference. First operand 13896 states and 36636 transitions. Second operand has 15 states, 15 states have (on average 4.733333333333333) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:42,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:56:42,267 INFO L93 Difference]: Finished difference Result 16479 states and 41384 transitions. [2021-06-05 03:56:42,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 03:56:42,267 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.733333333333333) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 03:56:42,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:56:42,285 INFO L225 Difference]: With dead ends: 16479 [2021-06-05 03:56:42,285 INFO L226 Difference]: Without dead ends: 16473 [2021-06-05 03:56:42,285 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 84.7ms TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:56:42,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16473 states. [2021-06-05 03:56:42,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16473 to 13895. [2021-06-05 03:56:42,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13895 states, 13894 states have (on average 2.6363178350367065) internal successors, (36629), 13894 states have internal predecessors, (36629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:42,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13895 states to 13895 states and 36629 transitions. [2021-06-05 03:56:42,471 INFO L78 Accepts]: Start accepts. Automaton has 13895 states and 36629 transitions. Word has length 59 [2021-06-05 03:56:42,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:56:42,471 INFO L482 AbstractCegarLoop]: Abstraction has 13895 states and 36629 transitions. [2021-06-05 03:56:42,471 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.733333333333333) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:42,471 INFO L276 IsEmpty]: Start isEmpty. Operand 13895 states and 36629 transitions. [2021-06-05 03:56:42,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 03:56:42,479 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:56:42,479 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:56:42,679 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1125,534 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:42,679 INFO L430 AbstractCegarLoop]: === Iteration 543 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:56:42,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:56:42,679 INFO L82 PathProgramCache]: Analyzing trace with hash 268774039, now seen corresponding path program 324 times [2021-06-05 03:56:42,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:56:42,679 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144952411] [2021-06-05 03:56:42,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:56:42,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:42,763 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 158 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:56:42,764 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:56:42,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144952411] [2021-06-05 03:56:42,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144952411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:42,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992497670] [2021-06-05 03:56:42,764 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 535 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 535 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:42,792 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-06-05 03:56:42,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:56:42,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 03:56:42,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:56:42,869 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 159 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:56:42,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992497670] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:42,869 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:56:42,869 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 03:56:42,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667437465] [2021-06-05 03:56:42,870 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 03:56:42,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:56:42,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 03:56:42,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:56:42,870 INFO L87 Difference]: Start difference. First operand 13895 states and 36629 transitions. Second operand has 13 states, 13 states have (on average 4.615384615384615) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:43,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:56:43,574 INFO L93 Difference]: Finished difference Result 16130 states and 41196 transitions. [2021-06-05 03:56:43,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 03:56:43,574 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.615384615384615) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 03:56:43,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:56:43,591 INFO L225 Difference]: With dead ends: 16130 [2021-06-05 03:56:43,591 INFO L226 Difference]: Without dead ends: 16076 [2021-06-05 03:56:43,591 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 265.9ms TimeCoverageRelationStatistics Valid=141, Invalid=1049, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 03:56:43,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16076 states. [2021-06-05 03:56:43,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16076 to 14050. [2021-06-05 03:56:43,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14050 states, 14049 states have (on average 2.6358459676845327) internal successors, (37031), 14049 states have internal predecessors, (37031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:43,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14050 states to 14050 states and 37031 transitions. [2021-06-05 03:56:43,795 INFO L78 Accepts]: Start accepts. Automaton has 14050 states and 37031 transitions. Word has length 59 [2021-06-05 03:56:43,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:56:43,795 INFO L482 AbstractCegarLoop]: Abstraction has 14050 states and 37031 transitions. [2021-06-05 03:56:43,796 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.615384615384615) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:43,796 INFO L276 IsEmpty]: Start isEmpty. Operand 14050 states and 37031 transitions. [2021-06-05 03:56:43,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 03:56:43,803 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:56:43,803 INFO L521 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:56:44,003 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 535 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1128 [2021-06-05 03:56:44,004 INFO L430 AbstractCegarLoop]: === Iteration 544 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:56:44,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:56:44,004 INFO L82 PathProgramCache]: Analyzing trace with hash 1801333148, now seen corresponding path program 325 times [2021-06-05 03:56:44,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:56:44,004 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564078941] [2021-06-05 03:56:44,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:56:44,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:44,079 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 69 proven. 109 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:56:44,079 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:56:44,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564078941] [2021-06-05 03:56:44,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564078941] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:44,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065215227] [2021-06-05 03:56:44,079 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 536 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 536 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:44,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:44,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 03:56:44,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:56:44,180 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 69 proven. 109 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:56:44,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065215227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:44,180 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:56:44,180 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-06-05 03:56:44,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078072613] [2021-06-05 03:56:44,180 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 03:56:44,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:56:44,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 03:56:44,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:56:44,181 INFO L87 Difference]: Start difference. First operand 14050 states and 37031 transitions. Second operand has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:44,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:56:44,362 INFO L93 Difference]: Finished difference Result 16536 states and 41568 transitions. [2021-06-05 03:56:44,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 03:56:44,362 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 03:56:44,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:56:44,379 INFO L225 Difference]: With dead ends: 16536 [2021-06-05 03:56:44,379 INFO L226 Difference]: Without dead ends: 16518 [2021-06-05 03:56:44,379 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 76.9ms TimeCoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:56:44,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16518 states. [2021-06-05 03:56:44,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16518 to 14050. [2021-06-05 03:56:44,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14050 states, 14049 states have (on average 2.6353477115808954) internal successors, (37024), 14049 states have internal predecessors, (37024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:44,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14050 states to 14050 states and 37024 transitions. [2021-06-05 03:56:44,572 INFO L78 Accepts]: Start accepts. Automaton has 14050 states and 37024 transitions. Word has length 59 [2021-06-05 03:56:44,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:56:44,572 INFO L482 AbstractCegarLoop]: Abstraction has 14050 states and 37024 transitions. [2021-06-05 03:56:44,572 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:44,572 INFO L276 IsEmpty]: Start isEmpty. Operand 14050 states and 37024 transitions. [2021-06-05 03:56:44,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 03:56:44,580 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:56:44,580 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:56:44,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 536 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1129 [2021-06-05 03:56:44,781 INFO L430 AbstractCegarLoop]: === Iteration 545 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:56:44,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:56:44,781 INFO L82 PathProgramCache]: Analyzing trace with hash 423610573, now seen corresponding path program 326 times [2021-06-05 03:56:44,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:56:44,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416750156] [2021-06-05 03:56:44,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:56:44,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:44,875 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 158 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:56:44,875 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:56:44,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416750156] [2021-06-05 03:56:44,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416750156] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:44,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408000086] [2021-06-05 03:56:44,875 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 537 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 537 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:44,901 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:56:44,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:56:44,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 03:56:44,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:56:45,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 03:56:45,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2021-06-05 03:56:45,007 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 03:56:45,009 INFO L628 ElimStorePlain]: treesize reduction 20, result has 4.8 percent of original size [2021-06-05 03:56:45,009 INFO L518 ElimStorePlain]: Eliminatee B vanished before elimination [2021-06-05 03:56:45,010 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 03:56:45,010 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:1 [2021-06-05 03:56:45,017 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 20 proven. 155 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:56:45,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408000086] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:45,017 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:56:45,017 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 16 [2021-06-05 03:56:45,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047437971] [2021-06-05 03:56:45,017 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 03:56:45,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:56:45,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 03:56:45,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:56:45,017 INFO L87 Difference]: Start difference. First operand 14050 states and 37024 transitions. Second operand has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 16 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:46,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:56:46,245 INFO L93 Difference]: Finished difference Result 19628 states and 48599 transitions. [2021-06-05 03:56:46,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-05 03:56:46,245 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 16 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 03:56:46,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:56:46,266 INFO L225 Difference]: With dead ends: 19628 [2021-06-05 03:56:46,266 INFO L226 Difference]: Without dead ends: 19460 [2021-06-05 03:56:46,267 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1220 ImplicationChecksByTransitivity, 563.8ms TimeCoverageRelationStatistics Valid=375, Invalid=3531, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 03:56:46,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19460 states. [2021-06-05 03:56:46,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19460 to 14519. [2021-06-05 03:56:46,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14519 states, 14518 states have (on average 2.627910180465629) internal successors, (38152), 14518 states have internal predecessors, (38152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:46,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14519 states to 14519 states and 38152 transitions. [2021-06-05 03:56:46,470 INFO L78 Accepts]: Start accepts. Automaton has 14519 states and 38152 transitions. Word has length 59 [2021-06-05 03:56:46,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:56:46,470 INFO L482 AbstractCegarLoop]: Abstraction has 14519 states and 38152 transitions. [2021-06-05 03:56:46,470 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 16 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:46,470 INFO L276 IsEmpty]: Start isEmpty. Operand 14519 states and 38152 transitions. [2021-06-05 03:56:46,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 03:56:46,478 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:56:46,478 INFO L521 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:56:46,678 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 537 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1133 [2021-06-05 03:56:46,678 INFO L430 AbstractCegarLoop]: === Iteration 546 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:56:46,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:56:46,679 INFO L82 PathProgramCache]: Analyzing trace with hash 810213250, now seen corresponding path program 327 times [2021-06-05 03:56:46,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:56:46,679 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009372436] [2021-06-05 03:56:46,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:56:46,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:46,764 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 58 proven. 120 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:56:46,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:56:46,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009372436] [2021-06-05 03:56:46,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009372436] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:46,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309367358] [2021-06-05 03:56:46,765 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 538 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 538 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:46,794 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-05 03:56:46,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:56:46,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 03:56:46,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:56:46,871 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 58 proven. 120 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:56:46,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309367358] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:46,871 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:56:46,872 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-06-05 03:56:46,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580553708] [2021-06-05 03:56:46,872 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:56:46,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:56:46,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:56:46,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:56:46,872 INFO L87 Difference]: Start difference. First operand 14519 states and 38152 transitions. Second operand has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:47,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:56:47,095 INFO L93 Difference]: Finished difference Result 17127 states and 42923 transitions. [2021-06-05 03:56:47,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 03:56:47,095 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 03:56:47,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:56:47,110 INFO L225 Difference]: With dead ends: 17127 [2021-06-05 03:56:47,110 INFO L226 Difference]: Without dead ends: 17100 [2021-06-05 03:56:47,110 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 95.9ms TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:56:47,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17100 states. [2021-06-05 03:56:47,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17100 to 14519. [2021-06-05 03:56:47,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14519 states, 14518 states have (on average 2.6277035404325666) internal successors, (38149), 14518 states have internal predecessors, (38149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:47,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14519 states to 14519 states and 38149 transitions. [2021-06-05 03:56:47,309 INFO L78 Accepts]: Start accepts. Automaton has 14519 states and 38149 transitions. Word has length 59 [2021-06-05 03:56:47,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:56:47,309 INFO L482 AbstractCegarLoop]: Abstraction has 14519 states and 38149 transitions. [2021-06-05 03:56:47,309 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:47,309 INFO L276 IsEmpty]: Start isEmpty. Operand 14519 states and 38149 transitions. [2021-06-05 03:56:47,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 03:56:47,317 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:56:47,317 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:56:47,517 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 538 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1134 [2021-06-05 03:56:47,518 INFO L430 AbstractCegarLoop]: === Iteration 547 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:56:47,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:56:47,518 INFO L82 PathProgramCache]: Analyzing trace with hash 363919063, now seen corresponding path program 328 times [2021-06-05 03:56:47,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:56:47,518 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421689046] [2021-06-05 03:56:47,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:56:47,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:47,621 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 158 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:56:47,621 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:56:47,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421689046] [2021-06-05 03:56:47,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421689046] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:47,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280075331] [2021-06-05 03:56:47,622 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 539 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 539 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:47,647 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:56:47,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:56:47,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 03:56:47,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:56:47,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 03:56:47,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2021-06-05 03:56:47,771 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 03:56:47,773 INFO L628 ElimStorePlain]: treesize reduction 20, result has 4.8 percent of original size [2021-06-05 03:56:47,773 INFO L518 ElimStorePlain]: Eliminatee B vanished before elimination [2021-06-05 03:56:47,773 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 03:56:47,773 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:1 [2021-06-05 03:56:47,779 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 20 proven. 155 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:56:47,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [280075331] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:47,779 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:56:47,779 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 18 [2021-06-05 03:56:47,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500638640] [2021-06-05 03:56:47,780 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:56:47,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:56:47,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:56:47,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:56:47,780 INFO L87 Difference]: Start difference. First operand 14519 states and 38149 transitions. Second operand has 19 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 18 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:49,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:56:49,730 INFO L93 Difference]: Finished difference Result 27358 states and 65118 transitions. [2021-06-05 03:56:49,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2021-06-05 03:56:49,730 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 18 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 03:56:49,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:56:49,759 INFO L225 Difference]: With dead ends: 27358 [2021-06-05 03:56:49,759 INFO L226 Difference]: Without dead ends: 26914 [2021-06-05 03:56:49,760 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4638 ImplicationChecksByTransitivity, 1180.9ms TimeCoverageRelationStatistics Valid=969, Invalid=11241, Unknown=0, NotChecked=0, Total=12210 [2021-06-05 03:56:49,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26914 states. [2021-06-05 03:56:49,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26914 to 15487. [2021-06-05 03:56:49,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15487 states, 15486 states have (on average 2.61139093374661) internal successors, (40440), 15486 states have internal predecessors, (40440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:50,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15487 states to 15487 states and 40440 transitions. [2021-06-05 03:56:50,010 INFO L78 Accepts]: Start accepts. Automaton has 15487 states and 40440 transitions. Word has length 59 [2021-06-05 03:56:50,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:56:50,010 INFO L482 AbstractCegarLoop]: Abstraction has 15487 states and 40440 transitions. [2021-06-05 03:56:50,010 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 18 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:50,010 INFO L276 IsEmpty]: Start isEmpty. Operand 15487 states and 40440 transitions. [2021-06-05 03:56:50,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 03:56:50,018 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:56:50,018 INFO L521 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:56:50,218 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1139,539 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:50,218 INFO L430 AbstractCegarLoop]: === Iteration 548 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:56:50,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:56:50,219 INFO L82 PathProgramCache]: Analyzing trace with hash -2037475364, now seen corresponding path program 329 times [2021-06-05 03:56:50,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:56:50,219 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747995314] [2021-06-05 03:56:50,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:56:50,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:50,314 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 53 proven. 125 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:56:50,314 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:56:50,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747995314] [2021-06-05 03:56:50,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747995314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:50,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288638311] [2021-06-05 03:56:50,314 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 540 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 540 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:50,349 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-05 03:56:50,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:56:50,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 03:56:50,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:56:50,450 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 53 proven. 125 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:56:50,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288638311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:50,450 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:56:50,450 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 17 [2021-06-05 03:56:50,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066340474] [2021-06-05 03:56:50,450 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 03:56:50,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:56:50,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 03:56:50,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-06-05 03:56:50,451 INFO L87 Difference]: Start difference. First operand 15487 states and 40440 transitions. Second operand has 18 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 17 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:50,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:56:50,719 INFO L93 Difference]: Finished difference Result 18492 states and 46004 transitions. [2021-06-05 03:56:50,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 03:56:50,719 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 17 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 03:56:50,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:56:50,737 INFO L225 Difference]: With dead ends: 18492 [2021-06-05 03:56:50,737 INFO L226 Difference]: Without dead ends: 18456 [2021-06-05 03:56:50,737 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 140.3ms TimeCoverageRelationStatistics Valid=136, Invalid=326, Unknown=0, NotChecked=0, Total=462 [2021-06-05 03:56:50,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18456 states. [2021-06-05 03:56:50,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18456 to 15487. [2021-06-05 03:56:50,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15487 states, 15486 states have (on average 2.611197210383572) internal successors, (40437), 15486 states have internal predecessors, (40437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:50,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15487 states to 15487 states and 40437 transitions. [2021-06-05 03:56:50,943 INFO L78 Accepts]: Start accepts. Automaton has 15487 states and 40437 transitions. Word has length 59 [2021-06-05 03:56:50,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:56:50,943 INFO L482 AbstractCegarLoop]: Abstraction has 15487 states and 40437 transitions. [2021-06-05 03:56:50,943 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 17 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:50,943 INFO L276 IsEmpty]: Start isEmpty. Operand 15487 states and 40437 transitions. [2021-06-05 03:56:50,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 03:56:50,951 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:56:50,951 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:56:51,151 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1140,540 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:51,151 INFO L430 AbstractCegarLoop]: === Iteration 549 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:56:51,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:56:51,151 INFO L82 PathProgramCache]: Analyzing trace with hash 210605197, now seen corresponding path program 330 times [2021-06-05 03:56:51,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:56:51,152 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850969910] [2021-06-05 03:56:51,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:56:51,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:51,266 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 158 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:56:51,266 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:56:51,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850969910] [2021-06-05 03:56:51,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850969910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:51,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131575548] [2021-06-05 03:56:51,266 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 541 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 541 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:51,295 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-06-05 03:56:51,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:56:51,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 03:56:51,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:56:51,373 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 159 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:56:51,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131575548] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:51,373 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:56:51,373 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 03:56:51,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857348853] [2021-06-05 03:56:51,373 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:56:51,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:56:51,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:56:51,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:56:51,374 INFO L87 Difference]: Start difference. First operand 15487 states and 40437 transitions. Second operand has 16 states, 16 states have (on average 3.75) internal successors, (60), 15 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:54,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:56:54,880 INFO L93 Difference]: Finished difference Result 44514 states and 101971 transitions. [2021-06-05 03:56:54,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 191 states. [2021-06-05 03:56:54,880 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.75) internal successors, (60), 15 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 03:56:54,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:56:54,927 INFO L225 Difference]: With dead ends: 44514 [2021-06-05 03:56:54,927 INFO L226 Difference]: Without dead ends: 43374 [2021-06-05 03:56:54,928 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15415 ImplicationChecksByTransitivity, 2437.9ms TimeCoverageRelationStatistics Valid=2427, Invalid=33863, Unknown=0, NotChecked=0, Total=36290 [2021-06-05 03:56:54,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43374 states. [2021-06-05 03:56:55,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43374 to 17204. [2021-06-05 03:56:55,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17204 states, 17203 states have (on average 2.5862349590187756) internal successors, (44491), 17203 states have internal predecessors, (44491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:55,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17204 states to 17204 states and 44491 transitions. [2021-06-05 03:56:55,251 INFO L78 Accepts]: Start accepts. Automaton has 17204 states and 44491 transitions. Word has length 59 [2021-06-05 03:56:55,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:56:55,251 INFO L482 AbstractCegarLoop]: Abstraction has 17204 states and 44491 transitions. [2021-06-05 03:56:55,251 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.75) internal successors, (60), 15 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:55,251 INFO L276 IsEmpty]: Start isEmpty. Operand 17204 states and 44491 transitions. [2021-06-05 03:56:55,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 03:56:55,259 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:56:55,259 INFO L521 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:56:55,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 541 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1146 [2021-06-05 03:56:55,460 INFO L430 AbstractCegarLoop]: === Iteration 550 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:56:55,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:56:55,460 INFO L82 PathProgramCache]: Analyzing trace with hash 960022850, now seen corresponding path program 331 times [2021-06-05 03:56:55,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:56:55,460 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572431721] [2021-06-05 03:56:55,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:56:55,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:55,565 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 54 proven. 124 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:56:55,565 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:56:55,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572431721] [2021-06-05 03:56:55,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572431721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:55,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704602811] [2021-06-05 03:56:55,566 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 542 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 542 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:55,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:55,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 03:56:55,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:56:55,669 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 54 proven. 124 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:56:55,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704602811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:55,669 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:56:55,669 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-06-05 03:56:55,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776721770] [2021-06-05 03:56:55,670 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:56:55,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:56:55,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:56:55,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:56:55,670 INFO L87 Difference]: Start difference. First operand 17204 states and 44491 transitions. Second operand has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:55,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:56:55,899 INFO L93 Difference]: Finished difference Result 20471 states and 50544 transitions. [2021-06-05 03:56:55,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 03:56:55,899 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 03:56:55,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:56:55,921 INFO L225 Difference]: With dead ends: 20471 [2021-06-05 03:56:55,921 INFO L226 Difference]: Without dead ends: 20426 [2021-06-05 03:56:55,921 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 132.6ms TimeCoverageRelationStatistics Valid=137, Invalid=283, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:56:55,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20426 states. [2021-06-05 03:56:56,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20426 to 17204. [2021-06-05 03:56:56,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17204 states, 17203 states have (on average 2.586060570830669) internal successors, (44488), 17203 states have internal predecessors, (44488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:56,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17204 states to 17204 states and 44488 transitions. [2021-06-05 03:56:56,155 INFO L78 Accepts]: Start accepts. Automaton has 17204 states and 44488 transitions. Word has length 59 [2021-06-05 03:56:56,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:56:56,155 INFO L482 AbstractCegarLoop]: Abstraction has 17204 states and 44488 transitions. [2021-06-05 03:56:56,155 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:56,155 INFO L276 IsEmpty]: Start isEmpty. Operand 17204 states and 44488 transitions. [2021-06-05 03:56:56,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 03:56:56,164 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:56:56,164 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:56:56,364 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1147,542 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:56,364 INFO L430 AbstractCegarLoop]: === Iteration 551 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:56:56,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:56:56,364 INFO L82 PathProgramCache]: Analyzing trace with hash -1612541161, now seen corresponding path program 332 times [2021-06-05 03:56:56,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:56:56,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651719957] [2021-06-05 03:56:56,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:56:56,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:56,499 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 158 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:56:56,499 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:56:56,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651719957] [2021-06-05 03:56:56,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651719957] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:56,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055817132] [2021-06-05 03:56:56,499 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 543 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 543 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:56,525 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:56:56,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:56:56,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 03:56:56,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:56:56,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 03:56:56,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2021-06-05 03:56:56,699 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 03:56:56,701 INFO L628 ElimStorePlain]: treesize reduction 20, result has 4.8 percent of original size [2021-06-05 03:56:56,701 INFO L518 ElimStorePlain]: Eliminatee B vanished before elimination [2021-06-05 03:56:56,701 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 03:56:56,701 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:1 [2021-06-05 03:56:56,707 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 20 proven. 155 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:56:56,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055817132] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:56,707 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:56:56,707 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 22 [2021-06-05 03:56:56,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548827509] [2021-06-05 03:56:56,708 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 03:56:56,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:56:56,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 03:56:56,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-06-05 03:56:56,708 INFO L87 Difference]: Start difference. First operand 17204 states and 44488 transitions. Second operand has 23 states, 23 states have (on average 3.217391304347826) internal successors, (74), 22 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:03,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:57:03,110 INFO L93 Difference]: Finished difference Result 88879 states and 197085 transitions. [2021-06-05 03:57:03,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 319 states. [2021-06-05 03:57:03,110 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.217391304347826) internal successors, (74), 22 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 03:57:03,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:57:03,207 INFO L225 Difference]: With dead ends: 88879 [2021-06-05 03:57:03,207 INFO L226 Difference]: Without dead ends: 85405 [2021-06-05 03:57:03,211 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 317 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45804 ImplicationChecksByTransitivity, 5027.0ms TimeCoverageRelationStatistics Valid=5829, Invalid=95613, Unknown=0, NotChecked=0, Total=101442 [2021-06-05 03:57:03,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85405 states. [2021-06-05 03:57:03,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85405 to 19930. [2021-06-05 03:57:03,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19930 states, 19929 states have (on average 2.5569270911736663) internal successors, (50957), 19929 states have internal predecessors, (50957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:03,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19930 states to 19930 states and 50957 transitions. [2021-06-05 03:57:03,812 INFO L78 Accepts]: Start accepts. Automaton has 19930 states and 50957 transitions. Word has length 59 [2021-06-05 03:57:03,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:57:03,812 INFO L482 AbstractCegarLoop]: Abstraction has 19930 states and 50957 transitions. [2021-06-05 03:57:03,812 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 3.217391304347826) internal successors, (74), 22 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:03,812 INFO L276 IsEmpty]: Start isEmpty. Operand 19930 states and 50957 transitions. [2021-06-05 03:57:03,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 03:57:03,822 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:57:03,822 INFO L521 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:57:04,022 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 543 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1154 [2021-06-05 03:57:04,022 INFO L430 AbstractCegarLoop]: === Iteration 552 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:57:04,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:57:04,022 INFO L82 PathProgramCache]: Analyzing trace with hash -1530702308, now seen corresponding path program 333 times [2021-06-05 03:57:04,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:57:04,023 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122582305] [2021-06-05 03:57:04,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:57:04,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:57:04,137 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 61 proven. 117 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:57:04,137 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:57:04,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122582305] [2021-06-05 03:57:04,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122582305] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:04,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274636138] [2021-06-05 03:57:04,137 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 544 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 544 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:57:04,166 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-05 03:57:04,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:57:04,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 03:57:04,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:57:04,246 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 61 proven. 117 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:57:04,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274636138] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:04,246 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:57:04,246 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2021-06-05 03:57:04,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970815328] [2021-06-05 03:57:04,246 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 03:57:04,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:57:04,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 03:57:04,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:57:04,246 INFO L87 Difference]: Start difference. First operand 19930 states and 50957 transitions. Second operand has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:04,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:57:04,490 INFO L93 Difference]: Finished difference Result 23966 states and 58492 transitions. [2021-06-05 03:57:04,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 03:57:04,491 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 03:57:04,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:57:04,517 INFO L225 Difference]: With dead ends: 23966 [2021-06-05 03:57:04,517 INFO L226 Difference]: Without dead ends: 23912 [2021-06-05 03:57:04,517 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 152.7ms TimeCoverageRelationStatistics Valid=161, Invalid=345, Unknown=0, NotChecked=0, Total=506 [2021-06-05 03:57:04,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23912 states. [2021-06-05 03:57:04,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23912 to 19930. [2021-06-05 03:57:04,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19930 states, 19929 states have (on average 2.5567765567765566) internal successors, (50954), 19929 states have internal predecessors, (50954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:04,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19930 states to 19930 states and 50954 transitions. [2021-06-05 03:57:04,825 INFO L78 Accepts]: Start accepts. Automaton has 19930 states and 50954 transitions. Word has length 59 [2021-06-05 03:57:04,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:57:04,825 INFO L482 AbstractCegarLoop]: Abstraction has 19930 states and 50954 transitions. [2021-06-05 03:57:04,825 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:04,825 INFO L276 IsEmpty]: Start isEmpty. Operand 19930 states and 50954 transitions. [2021-06-05 03:57:04,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 03:57:04,834 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:57:04,834 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:57:05,034 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 544 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1155 [2021-06-05 03:57:05,034 INFO L430 AbstractCegarLoop]: === Iteration 553 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:57:05,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:57:05,035 INFO L82 PathProgramCache]: Analyzing trace with hash -809267123, now seen corresponding path program 334 times [2021-06-05 03:57:05,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:57:05,035 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066885905] [2021-06-05 03:57:05,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:57:05,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:57:05,173 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 158 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:57:05,173 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:57:05,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066885905] [2021-06-05 03:57:05,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066885905] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:05,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639126314] [2021-06-05 03:57:05,173 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 545 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 545 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:57:05,199 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:57:05,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:57:05,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 03:57:05,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:57:05,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 03:57:05,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2021-06-05 03:57:05,387 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 03:57:05,389 INFO L628 ElimStorePlain]: treesize reduction 20, result has 4.8 percent of original size [2021-06-05 03:57:05,389 INFO L518 ElimStorePlain]: Eliminatee B vanished before elimination [2021-06-05 03:57:05,389 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 03:57:05,389 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:1 [2021-06-05 03:57:05,396 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 20 proven. 155 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:57:05,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639126314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:05,396 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:57:05,396 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 24 [2021-06-05 03:57:05,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852715392] [2021-06-05 03:57:05,396 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 03:57:05,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:57:05,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 03:57:05,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-06-05 03:57:05,396 INFO L87 Difference]: Start difference. First operand 19930 states and 50954 transitions. Second operand has 25 states, 25 states have (on average 3.08) internal successors, (77), 24 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:16,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:57:16,444 INFO L93 Difference]: Finished difference Result 96650 states and 218441 transitions. [2021-06-05 03:57:16,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 511 states. [2021-06-05 03:57:16,444 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.08) internal successors, (77), 24 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 03:57:16,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:57:16,693 INFO L225 Difference]: With dead ends: 96650 [2021-06-05 03:57:16,693 INFO L226 Difference]: Without dead ends: 93908 [2021-06-05 03:57:16,701 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 562 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 509 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122443 ImplicationChecksByTransitivity, 9601.0ms TimeCoverageRelationStatistics Valid=13119, Invalid=247491, Unknown=0, NotChecked=0, Total=260610 [2021-06-05 03:57:16,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93908 states. [2021-06-05 03:57:17,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93908 to 23705. [2021-06-05 03:57:17,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23705 states, 23704 states have (on average 2.5331589605129934) internal successors, (60046), 23704 states have internal predecessors, (60046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:17,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23705 states to 23705 states and 60046 transitions. [2021-06-05 03:57:17,384 INFO L78 Accepts]: Start accepts. Automaton has 23705 states and 60046 transitions. Word has length 59 [2021-06-05 03:57:17,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:57:17,384 INFO L482 AbstractCegarLoop]: Abstraction has 23705 states and 60046 transitions. [2021-06-05 03:57:17,384 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 3.08) internal successors, (77), 24 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:17,384 INFO L276 IsEmpty]: Start isEmpty. Operand 23705 states and 60046 transitions. [2021-06-05 03:57:17,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 03:57:17,394 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:57:17,394 INFO L521 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:57:17,595 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 545 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1163 [2021-06-05 03:57:17,595 INFO L430 AbstractCegarLoop]: === Iteration 554 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:57:17,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:57:17,595 INFO L82 PathProgramCache]: Analyzing trace with hash 1426088706, now seen corresponding path program 335 times [2021-06-05 03:57:17,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:57:17,595 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504569264] [2021-06-05 03:57:17,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:57:17,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:57:17,778 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 74 proven. 104 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:57:17,779 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:57:17,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504569264] [2021-06-05 03:57:17,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504569264] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:17,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247995517] [2021-06-05 03:57:17,779 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 546 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 546 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:57:17,807 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-05 03:57:17,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:57:17,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 03:57:17,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:57:17,948 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 74 proven. 104 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:57:17,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247995517] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:17,948 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:57:17,948 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 20 [2021-06-05 03:57:17,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987434886] [2021-06-05 03:57:17,948 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 03:57:17,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:57:17,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 03:57:17,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:57:17,948 INFO L87 Difference]: Start difference. First operand 23705 states and 60046 transitions. Second operand has 21 states, 21 states have (on average 3.380952380952381) internal successors, (71), 20 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:18,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:57:18,354 INFO L93 Difference]: Finished difference Result 29277 states and 70528 transitions. [2021-06-05 03:57:18,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 03:57:18,355 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.380952380952381) internal successors, (71), 20 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 03:57:18,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:57:18,391 INFO L225 Difference]: With dead ends: 29277 [2021-06-05 03:57:18,392 INFO L226 Difference]: Without dead ends: 29214 [2021-06-05 03:57:18,392 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 207.7ms TimeCoverageRelationStatistics Valid=208, Invalid=548, Unknown=0, NotChecked=0, Total=756 [2021-06-05 03:57:18,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29214 states. [2021-06-05 03:57:18,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29214 to 23705. [2021-06-05 03:57:18,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23705 states, 23704 states have (on average 2.533032399595005) internal successors, (60043), 23704 states have internal predecessors, (60043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:18,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23705 states to 23705 states and 60043 transitions. [2021-06-05 03:57:18,735 INFO L78 Accepts]: Start accepts. Automaton has 23705 states and 60043 transitions. Word has length 59 [2021-06-05 03:57:18,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:57:18,735 INFO L482 AbstractCegarLoop]: Abstraction has 23705 states and 60043 transitions. [2021-06-05 03:57:18,735 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.380952380952381) internal successors, (71), 20 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:18,735 INFO L276 IsEmpty]: Start isEmpty. Operand 23705 states and 60043 transitions. [2021-06-05 03:57:18,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 03:57:18,745 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:57:18,745 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:57:18,946 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1164,546 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:57:18,946 INFO L430 AbstractCegarLoop]: === Iteration 555 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:57:18,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:57:18,946 INFO L82 PathProgramCache]: Analyzing trace with hash -2030174377, now seen corresponding path program 336 times [2021-06-05 03:57:18,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:57:18,946 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925422535] [2021-06-05 03:57:18,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:57:18,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:57:19,096 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:57:19,097 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:57:19,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925422535] [2021-06-05 03:57:19,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925422535] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:19,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029871666] [2021-06-05 03:57:19,097 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 547 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 547 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:57:19,127 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-06-05 03:57:19,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:57:19,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 03:57:19,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:57:19,202 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:57:19,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029871666] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:19,202 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:57:19,202 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 18 [2021-06-05 03:57:19,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312748339] [2021-06-05 03:57:19,203 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:57:19,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:57:19,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:57:19,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=305, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:57:19,203 INFO L87 Difference]: Start difference. First operand 23705 states and 60043 transitions. Second operand has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 18 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:20,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:57:20,074 INFO L93 Difference]: Finished difference Result 33949 states and 78972 transitions. [2021-06-05 03:57:20,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 03:57:20,075 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 18 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 03:57:20,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:57:20,106 INFO L225 Difference]: With dead ends: 33949 [2021-06-05 03:57:20,107 INFO L226 Difference]: Without dead ends: 30265 [2021-06-05 03:57:20,107 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 459.1ms TimeCoverageRelationStatistics Valid=273, Invalid=1367, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 03:57:20,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30265 states. [2021-06-05 03:57:20,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30265 to 13219. [2021-06-05 03:57:20,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13219 states, 13218 states have (on average 2.659479497654713) internal successors, (35153), 13218 states have internal predecessors, (35153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:20,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13219 states to 13219 states and 35153 transitions. [2021-06-05 03:57:20,319 INFO L78 Accepts]: Start accepts. Automaton has 13219 states and 35153 transitions. Word has length 59 [2021-06-05 03:57:20,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:57:20,319 INFO L482 AbstractCegarLoop]: Abstraction has 13219 states and 35153 transitions. [2021-06-05 03:57:20,319 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 18 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:20,319 INFO L276 IsEmpty]: Start isEmpty. Operand 13219 states and 35153 transitions. [2021-06-05 03:57:20,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 03:57:20,326 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:57:20,326 INFO L521 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:57:20,526 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1173,547 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:57:20,526 INFO L430 AbstractCegarLoop]: === Iteration 556 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:57:20,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:57:20,527 INFO L82 PathProgramCache]: Analyzing trace with hash 2026731402, now seen corresponding path program 161 times [2021-06-05 03:57:20,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:57:20,527 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656390486] [2021-06-05 03:57:20,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:57:20,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:57:20,598 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 114 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:57:20,598 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:57:20,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656390486] [2021-06-05 03:57:20,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656390486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:20,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491641037] [2021-06-05 03:57:20,598 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 548 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 548 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:57:20,627 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-06-05 03:57:20,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:57:20,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 03:57:20,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:57:20,750 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 114 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:57:20,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491641037] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:20,750 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:57:20,750 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 20 [2021-06-05 03:57:20,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724081064] [2021-06-05 03:57:20,750 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 03:57:20,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:57:20,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 03:57:20,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=264, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:57:20,750 INFO L87 Difference]: Start difference. First operand 13219 states and 35153 transitions. Second operand has 21 states, 21 states have (on average 4.428571428571429) internal successors, (93), 20 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:21,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:57:21,045 INFO L93 Difference]: Finished difference Result 15361 states and 39642 transitions. [2021-06-05 03:57:21,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 03:57:21,045 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.428571428571429) internal successors, (93), 20 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 03:57:21,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:57:21,061 INFO L225 Difference]: With dead ends: 15361 [2021-06-05 03:57:21,061 INFO L226 Difference]: Without dead ends: 15347 [2021-06-05 03:57:21,062 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 124.4ms TimeCoverageRelationStatistics Valid=173, Invalid=333, Unknown=0, NotChecked=0, Total=506 [2021-06-05 03:57:21,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15347 states. [2021-06-05 03:57:21,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15347 to 13918. [2021-06-05 03:57:21,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13918 states, 13917 states have (on average 2.6583315369691745) internal successors, (36996), 13917 states have internal predecessors, (36996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:21,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13918 states to 13918 states and 36996 transitions. [2021-06-05 03:57:21,252 INFO L78 Accepts]: Start accepts. Automaton has 13918 states and 36996 transitions. Word has length 59 [2021-06-05 03:57:21,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:57:21,252 INFO L482 AbstractCegarLoop]: Abstraction has 13918 states and 36996 transitions. [2021-06-05 03:57:21,252 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 4.428571428571429) internal successors, (93), 20 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:21,252 INFO L276 IsEmpty]: Start isEmpty. Operand 13918 states and 36996 transitions. [2021-06-05 03:57:21,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 03:57:21,259 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:57:21,259 INFO L521 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:57:21,459 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1174,548 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:57:21,460 INFO L430 AbstractCegarLoop]: === Iteration 557 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:57:21,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:57:21,460 INFO L82 PathProgramCache]: Analyzing trace with hash 1404850992, now seen corresponding path program 162 times [2021-06-05 03:57:21,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:57:21,460 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101740273] [2021-06-05 03:57:21,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:57:21,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:57:21,533 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 114 proven. 64 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:57:21,533 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:57:21,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101740273] [2021-06-05 03:57:21,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101740273] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:21,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229060024] [2021-06-05 03:57:21,533 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 549 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 549 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:57:21,561 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-06-05 03:57:21,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:57:21,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 03:57:21,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:57:21,644 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 114 proven. 64 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:57:21,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229060024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:21,644 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:57:21,644 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 12 [2021-06-05 03:57:21,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440216057] [2021-06-05 03:57:21,644 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 03:57:21,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:57:21,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 03:57:21,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:57:21,645 INFO L87 Difference]: Start difference. First operand 13918 states and 36996 transitions. Second operand has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:21,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:57:21,907 INFO L93 Difference]: Finished difference Result 16530 states and 42212 transitions. [2021-06-05 03:57:21,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 03:57:21,907 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 03:57:21,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:57:21,925 INFO L225 Difference]: With dead ends: 16530 [2021-06-05 03:57:21,925 INFO L226 Difference]: Without dead ends: 16530 [2021-06-05 03:57:21,925 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 126.2ms TimeCoverageRelationStatistics Valid=172, Invalid=248, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:57:21,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16530 states. [2021-06-05 03:57:22,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16530 to 13921. [2021-06-05 03:57:22,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13921 states, 13920 states have (on average 2.658405172413793) internal successors, (37005), 13920 states have internal predecessors, (37005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:22,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13921 states to 13921 states and 37005 transitions. [2021-06-05 03:57:22,154 INFO L78 Accepts]: Start accepts. Automaton has 13921 states and 37005 transitions. Word has length 59 [2021-06-05 03:57:22,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:57:22,154 INFO L482 AbstractCegarLoop]: Abstraction has 13921 states and 37005 transitions. [2021-06-05 03:57:22,154 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:22,154 INFO L276 IsEmpty]: Start isEmpty. Operand 13921 states and 37005 transitions. [2021-06-05 03:57:22,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 03:57:22,162 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:57:22,162 INFO L521 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:57:22,362 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1176,549 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:57:22,362 INFO L430 AbstractCegarLoop]: === Iteration 558 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:57:22,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:57:22,363 INFO L82 PathProgramCache]: Analyzing trace with hash -232721464, now seen corresponding path program 163 times [2021-06-05 03:57:22,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:57:22,363 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116475831] [2021-06-05 03:57:22,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:57:22,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:57:22,443 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 115 proven. 63 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:57:22,443 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:57:22,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116475831] [2021-06-05 03:57:22,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116475831] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:22,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740843606] [2021-06-05 03:57:22,444 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 550 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 550 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:57:22,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:57:22,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 03:57:22,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:57:22,571 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 116 proven. 62 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:57:22,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740843606] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:22,572 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:57:22,572 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 15 [2021-06-05 03:57:22,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049356705] [2021-06-05 03:57:22,572 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:57:22,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:57:22,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:57:22,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:57:22,572 INFO L87 Difference]: Start difference. First operand 13921 states and 37005 transitions. Second operand has 16 states, 16 states have (on average 4.1875) internal successors, (67), 15 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:23,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:57:23,079 INFO L93 Difference]: Finished difference Result 15683 states and 40328 transitions. [2021-06-05 03:57:23,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 03:57:23,079 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.1875) internal successors, (67), 15 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 03:57:23,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:57:23,096 INFO L225 Difference]: With dead ends: 15683 [2021-06-05 03:57:23,096 INFO L226 Difference]: Without dead ends: 15683 [2021-06-05 03:57:23,096 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 272.1ms TimeCoverageRelationStatistics Valid=412, Invalid=710, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 03:57:23,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15683 states. [2021-06-05 03:57:23,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15683 to 13639. [2021-06-05 03:57:23,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13639 states, 13638 states have (on average 2.6627804663440386) internal successors, (36315), 13638 states have internal predecessors, (36315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:23,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13639 states to 13639 states and 36315 transitions. [2021-06-05 03:57:23,281 INFO L78 Accepts]: Start accepts. Automaton has 13639 states and 36315 transitions. Word has length 59 [2021-06-05 03:57:23,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:57:23,281 INFO L482 AbstractCegarLoop]: Abstraction has 13639 states and 36315 transitions. [2021-06-05 03:57:23,281 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.1875) internal successors, (67), 15 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:23,281 INFO L276 IsEmpty]: Start isEmpty. Operand 13639 states and 36315 transitions. [2021-06-05 03:57:23,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 03:57:23,288 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:57:23,288 INFO L521 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:57:23,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 550 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1177 [2021-06-05 03:57:23,489 INFO L430 AbstractCegarLoop]: === Iteration 559 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:57:23,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:57:23,489 INFO L82 PathProgramCache]: Analyzing trace with hash 1702913116, now seen corresponding path program 337 times [2021-06-05 03:57:23,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:57:23,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424718499] [2021-06-05 03:57:23,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:57:23,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:57:23,629 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 94 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:57:23,629 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:57:23,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424718499] [2021-06-05 03:57:23,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424718499] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:23,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317947055] [2021-06-05 03:57:23,630 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 551 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 551 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:57:23,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:57:23,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 03:57:23,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:57:23,736 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 94 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:57:23,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317947055] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:23,736 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:57:23,736 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-06-05 03:57:23,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721471579] [2021-06-05 03:57:23,736 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:57:23,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:57:23,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:57:23,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:57:23,737 INFO L87 Difference]: Start difference. First operand 13639 states and 36315 transitions. Second operand has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:24,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:57:24,053 INFO L93 Difference]: Finished difference Result 15972 states and 40554 transitions. [2021-06-05 03:57:24,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 03:57:24,053 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 03:57:24,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:57:24,070 INFO L225 Difference]: With dead ends: 15972 [2021-06-05 03:57:24,070 INFO L226 Difference]: Without dead ends: 15898 [2021-06-05 03:57:24,070 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 203.3ms TimeCoverageRelationStatistics Valid=215, Invalid=487, Unknown=0, NotChecked=0, Total=702 [2021-06-05 03:57:24,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15898 states. [2021-06-05 03:57:24,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15898 to 13648. [2021-06-05 03:57:24,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13648 states, 13647 states have (on average 2.6620502674580493) internal successors, (36329), 13647 states have internal predecessors, (36329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:24,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13648 states to 13648 states and 36329 transitions. [2021-06-05 03:57:24,252 INFO L78 Accepts]: Start accepts. Automaton has 13648 states and 36329 transitions. Word has length 59 [2021-06-05 03:57:24,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:57:24,252 INFO L482 AbstractCegarLoop]: Abstraction has 13648 states and 36329 transitions. [2021-06-05 03:57:24,252 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:24,252 INFO L276 IsEmpty]: Start isEmpty. Operand 13648 states and 36329 transitions. [2021-06-05 03:57:24,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-06-05 03:57:24,260 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:57:24,260 INFO L521 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:57:24,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1180,551 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:57:24,461 INFO L430 AbstractCegarLoop]: === Iteration 560 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:57:24,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:57:24,461 INFO L82 PathProgramCache]: Analyzing trace with hash -911313595, now seen corresponding path program 338 times [2021-06-05 03:57:24,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:57:24,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458712561] [2021-06-05 03:57:24,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:57:24,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:57:24,529 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 199 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:57:24,530 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:57:24,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458712561] [2021-06-05 03:57:24,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458712561] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:24,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191817200] [2021-06-05 03:57:24,530 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 552 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 552 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:57:24,556 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:57:24,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:57:24,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 03:57:24,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:57:24,917 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 92 proven. 109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:57:24,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191817200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:24,917 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:57:24,917 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 19] total 28 [2021-06-05 03:57:24,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723954625] [2021-06-05 03:57:24,917 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 03:57:24,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:57:24,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 03:57:24,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=685, Unknown=0, NotChecked=0, Total=812 [2021-06-05 03:57:24,918 INFO L87 Difference]: Start difference. First operand 13648 states and 36329 transitions. Second operand has 29 states, 29 states have (on average 4.241379310344827) internal successors, (123), 28 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:26,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:57:26,667 INFO L93 Difference]: Finished difference Result 17222 states and 43443 transitions. [2021-06-05 03:57:26,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 03:57:26,667 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 4.241379310344827) internal successors, (123), 28 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-06-05 03:57:26,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:57:26,686 INFO L225 Difference]: With dead ends: 17222 [2021-06-05 03:57:26,686 INFO L226 Difference]: Without dead ends: 17184 [2021-06-05 03:57:26,686 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1198 ImplicationChecksByTransitivity, 956.5ms TimeCoverageRelationStatistics Valid=971, Invalid=4141, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 03:57:26,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17184 states. [2021-06-05 03:57:26,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17184 to 14862. [2021-06-05 03:57:26,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14862 states, 14861 states have (on average 2.622905591817509) internal successors, (38979), 14861 states have internal predecessors, (38979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:26,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14862 states to 14862 states and 38979 transitions. [2021-06-05 03:57:26,886 INFO L78 Accepts]: Start accepts. Automaton has 14862 states and 38979 transitions. Word has length 62 [2021-06-05 03:57:26,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:57:26,886 INFO L482 AbstractCegarLoop]: Abstraction has 14862 states and 38979 transitions. [2021-06-05 03:57:26,886 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 4.241379310344827) internal successors, (123), 28 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:26,886 INFO L276 IsEmpty]: Start isEmpty. Operand 14862 states and 38979 transitions. [2021-06-05 03:57:26,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-06-05 03:57:26,895 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:57:26,895 INFO L521 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:57:27,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 552 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1190 [2021-06-05 03:57:27,096 INFO L430 AbstractCegarLoop]: === Iteration 561 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:57:27,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:57:27,096 INFO L82 PathProgramCache]: Analyzing trace with hash 2125604839, now seen corresponding path program 339 times [2021-06-05 03:57:27,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:57:27,096 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757204341] [2021-06-05 03:57:27,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:57:27,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:57:27,165 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 194 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 03:57:27,165 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:57:27,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757204341] [2021-06-05 03:57:27,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757204341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:27,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857684470] [2021-06-05 03:57:27,165 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 553 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 553 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:57:27,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-06-05 03:57:27,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:57:27,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 03:57:27,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:57:27,266 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 194 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 03:57:27,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857684470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:27,267 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:57:27,267 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 03:57:27,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662553123] [2021-06-05 03:57:27,267 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 03:57:27,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:57:27,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 03:57:27,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-06-05 03:57:27,267 INFO L87 Difference]: Start difference. First operand 14862 states and 38979 transitions. Second operand has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 10 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:27,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:57:27,639 INFO L93 Difference]: Finished difference Result 16116 states and 41321 transitions. [2021-06-05 03:57:27,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 03:57:27,639 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 10 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-06-05 03:57:27,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:57:27,656 INFO L225 Difference]: With dead ends: 16116 [2021-06-05 03:57:27,656 INFO L226 Difference]: Without dead ends: 16081 [2021-06-05 03:57:27,656 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 57.0ms TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-06-05 03:57:27,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16081 states. [2021-06-05 03:57:27,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16081 to 14880. [2021-06-05 03:57:27,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14880 states, 14879 states have (on average 2.62228644398145) internal successors, (39017), 14879 states have internal predecessors, (39017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:27,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14880 states to 14880 states and 39017 transitions. [2021-06-05 03:57:27,841 INFO L78 Accepts]: Start accepts. Automaton has 14880 states and 39017 transitions. Word has length 62 [2021-06-05 03:57:27,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:57:27,841 INFO L482 AbstractCegarLoop]: Abstraction has 14880 states and 39017 transitions. [2021-06-05 03:57:27,841 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 10 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:27,841 INFO L276 IsEmpty]: Start isEmpty. Operand 14880 states and 39017 transitions. [2021-06-05 03:57:27,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-06-05 03:57:27,850 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:57:27,850 INFO L521 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:57:28,050 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1191,553 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:57:28,050 INFO L430 AbstractCegarLoop]: === Iteration 562 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:57:28,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:57:28,050 INFO L82 PathProgramCache]: Analyzing trace with hash -845583229, now seen corresponding path program 340 times [2021-06-05 03:57:28,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:57:28,050 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501145847] [2021-06-05 03:57:28,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:57:28,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:57:28,120 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 194 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 03:57:28,120 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:57:28,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501145847] [2021-06-05 03:57:28,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501145847] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:28,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245949720] [2021-06-05 03:57:28,120 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 554 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 554 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:57:28,146 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:57:28,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:57:28,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 03:57:28,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:57:28,218 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 194 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 03:57:28,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245949720] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:28,218 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:57:28,218 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 03:57:28,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900248138] [2021-06-05 03:57:28,218 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 03:57:28,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:57:28,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 03:57:28,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-06-05 03:57:28,219 INFO L87 Difference]: Start difference. First operand 14880 states and 39017 transitions. Second operand has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 10 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:28,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:57:28,595 INFO L93 Difference]: Finished difference Result 16292 states and 41632 transitions. [2021-06-05 03:57:28,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 03:57:28,595 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 10 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-06-05 03:57:28,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:57:28,611 INFO L225 Difference]: With dead ends: 16292 [2021-06-05 03:57:28,612 INFO L226 Difference]: Without dead ends: 16254 [2021-06-05 03:57:28,612 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 58.0ms TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-06-05 03:57:28,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16254 states. [2021-06-05 03:57:28,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16254 to 14979. [2021-06-05 03:57:28,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14979 states, 14978 states have (on average 2.617038322873548) internal successors, (39198), 14978 states have internal predecessors, (39198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:28,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14979 states to 14979 states and 39198 transitions. [2021-06-05 03:57:28,827 INFO L78 Accepts]: Start accepts. Automaton has 14979 states and 39198 transitions. Word has length 62 [2021-06-05 03:57:28,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:57:28,827 INFO L482 AbstractCegarLoop]: Abstraction has 14979 states and 39198 transitions. [2021-06-05 03:57:28,827 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 10 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:28,827 INFO L276 IsEmpty]: Start isEmpty. Operand 14979 states and 39198 transitions. [2021-06-05 03:57:28,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-06-05 03:57:28,836 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:57:28,836 INFO L521 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:57:29,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1192,554 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:57:29,037 INFO L430 AbstractCegarLoop]: === Iteration 563 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:57:29,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:57:29,037 INFO L82 PathProgramCache]: Analyzing trace with hash -528313753, now seen corresponding path program 341 times [2021-06-05 03:57:29,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:57:29,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752060697] [2021-06-05 03:57:29,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:57:29,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:57:29,106 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 194 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 03:57:29,107 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:57:29,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752060697] [2021-06-05 03:57:29,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752060697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:29,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980247233] [2021-06-05 03:57:29,107 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 555 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 555 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:57:29,138 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-06-05 03:57:29,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:57:29,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 03:57:29,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:57:29,211 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 194 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 03:57:29,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980247233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:29,211 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:57:29,211 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 03:57:29,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465014987] [2021-06-05 03:57:29,211 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 03:57:29,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:57:29,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 03:57:29,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-06-05 03:57:29,212 INFO L87 Difference]: Start difference. First operand 14979 states and 39198 transitions. Second operand has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 10 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:29,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:57:29,586 INFO L93 Difference]: Finished difference Result 16320 states and 41716 transitions. [2021-06-05 03:57:29,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 03:57:29,586 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 10 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-06-05 03:57:29,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:57:29,602 INFO L225 Difference]: With dead ends: 16320 [2021-06-05 03:57:29,602 INFO L226 Difference]: Without dead ends: 16260 [2021-06-05 03:57:29,602 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 57.7ms TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-06-05 03:57:29,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16260 states. [2021-06-05 03:57:29,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16260 to 15051. [2021-06-05 03:57:29,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15051 states, 15050 states have (on average 2.613421926910299) internal successors, (39332), 15050 states have internal predecessors, (39332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:29,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15051 states to 15051 states and 39332 transitions. [2021-06-05 03:57:29,781 INFO L78 Accepts]: Start accepts. Automaton has 15051 states and 39332 transitions. Word has length 62 [2021-06-05 03:57:29,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:57:29,782 INFO L482 AbstractCegarLoop]: Abstraction has 15051 states and 39332 transitions. [2021-06-05 03:57:29,782 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 10 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:29,782 INFO L276 IsEmpty]: Start isEmpty. Operand 15051 states and 39332 transitions. [2021-06-05 03:57:29,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-06-05 03:57:29,790 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:57:29,790 INFO L521 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:57:29,990 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1193,555 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:57:29,991 INFO L430 AbstractCegarLoop]: === Iteration 564 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:57:29,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:57:29,991 INFO L82 PathProgramCache]: Analyzing trace with hash -1976372733, now seen corresponding path program 342 times [2021-06-05 03:57:29,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:57:29,991 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110976242] [2021-06-05 03:57:29,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:57:29,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:57:30,061 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 194 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 03:57:30,061 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:57:30,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110976242] [2021-06-05 03:57:30,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110976242] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:30,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875360436] [2021-06-05 03:57:30,062 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 556 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 556 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:57:30,094 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-06-05 03:57:30,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:57:30,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 03:57:30,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:57:30,290 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 44 proven. 155 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:57:30,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875360436] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:30,290 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:57:30,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-05 03:57:30,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40779022] [2021-06-05 03:57:30,290 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 03:57:30,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:57:30,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 03:57:30,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:57:30,291 INFO L87 Difference]: Start difference. First operand 15051 states and 39332 transitions. Second operand has 21 states, 21 states have (on average 5.714285714285714) internal successors, (120), 20 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:31,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:57:31,349 INFO L93 Difference]: Finished difference Result 22065 states and 52580 transitions. [2021-06-05 03:57:31,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 03:57:31,349 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.714285714285714) internal successors, (120), 20 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-06-05 03:57:31,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:57:31,373 INFO L225 Difference]: With dead ends: 22065 [2021-06-05 03:57:31,373 INFO L226 Difference]: Without dead ends: 21976 [2021-06-05 03:57:31,373 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 457.3ms TimeCoverageRelationStatistics Valid=390, Invalid=1866, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 03:57:31,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21976 states. [2021-06-05 03:57:31,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21976 to 15162. [2021-06-05 03:57:31,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15162 states, 15161 states have (on average 2.608403139634589) internal successors, (39546), 15161 states have internal predecessors, (39546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:31,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15162 states to 15162 states and 39546 transitions. [2021-06-05 03:57:31,592 INFO L78 Accepts]: Start accepts. Automaton has 15162 states and 39546 transitions. Word has length 62 [2021-06-05 03:57:31,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:57:31,592 INFO L482 AbstractCegarLoop]: Abstraction has 15162 states and 39546 transitions. [2021-06-05 03:57:31,592 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.714285714285714) internal successors, (120), 20 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:31,592 INFO L276 IsEmpty]: Start isEmpty. Operand 15162 states and 39546 transitions. [2021-06-05 03:57:31,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-06-05 03:57:31,601 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:57:31,601 INFO L521 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:57:31,801 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1194,556 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:57:31,801 INFO L430 AbstractCegarLoop]: === Iteration 565 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:57:31,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:57:31,801 INFO L82 PathProgramCache]: Analyzing trace with hash 1845042407, now seen corresponding path program 343 times [2021-06-05 03:57:31,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:57:31,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911477970] [2021-06-05 03:57:31,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:57:31,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:57:31,868 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 194 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 03:57:31,868 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:57:31,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911477970] [2021-06-05 03:57:31,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911477970] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:31,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662943544] [2021-06-05 03:57:31,869 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 557 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 557 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:57:31,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:57:31,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 03:57:31,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:57:32,035 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 194 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 03:57:32,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662943544] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:32,035 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:57:32,035 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 03:57:32,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859918909] [2021-06-05 03:57:32,035 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 03:57:32,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:57:32,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 03:57:32,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-06-05 03:57:32,036 INFO L87 Difference]: Start difference. First operand 15162 states and 39546 transitions. Second operand has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 10 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:32,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:57:32,435 INFO L93 Difference]: Finished difference Result 16450 states and 42034 transitions. [2021-06-05 03:57:32,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 03:57:32,435 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 10 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-06-05 03:57:32,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:57:32,452 INFO L225 Difference]: With dead ends: 16450 [2021-06-05 03:57:32,452 INFO L226 Difference]: Without dead ends: 16412 [2021-06-05 03:57:32,452 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 55.1ms TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-06-05 03:57:32,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16412 states. [2021-06-05 03:57:32,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16412 to 15288. [2021-06-05 03:57:32,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15288 states, 15287 states have (on average 2.6023418590959637) internal successors, (39782), 15287 states have internal predecessors, (39782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:32,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15288 states to 15288 states and 39782 transitions. [2021-06-05 03:57:32,677 INFO L78 Accepts]: Start accepts. Automaton has 15288 states and 39782 transitions. Word has length 62 [2021-06-05 03:57:32,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:57:32,678 INFO L482 AbstractCegarLoop]: Abstraction has 15288 states and 39782 transitions. [2021-06-05 03:57:32,678 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 10 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:32,678 INFO L276 IsEmpty]: Start isEmpty. Operand 15288 states and 39782 transitions. [2021-06-05 03:57:32,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-06-05 03:57:32,687 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:57:32,687 INFO L521 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:57:32,887 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1195,557 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:57:32,887 INFO L430 AbstractCegarLoop]: === Iteration 566 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:57:32,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:57:32,887 INFO L82 PathProgramCache]: Analyzing trace with hash -1074636925, now seen corresponding path program 344 times [2021-06-05 03:57:32,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:57:32,888 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861730201] [2021-06-05 03:57:32,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:57:32,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:57:32,963 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 194 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 03:57:32,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:57:32,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861730201] [2021-06-05 03:57:32,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861730201] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:32,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425877594] [2021-06-05 03:57:32,963 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 558 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 558 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:57:32,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:57:32,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:57:32,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 03:57:32,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:57:33,200 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 48 proven. 151 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:57:33,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425877594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:33,200 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:57:33,200 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-05 03:57:33,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735243758] [2021-06-05 03:57:33,200 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 03:57:33,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:57:33,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 03:57:33,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:57:33,201 INFO L87 Difference]: Start difference. First operand 15288 states and 39782 transitions. Second operand has 21 states, 21 states have (on average 5.714285714285714) internal successors, (120), 20 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:34,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:57:34,320 INFO L93 Difference]: Finished difference Result 22675 states and 53617 transitions. [2021-06-05 03:57:34,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 03:57:34,320 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.714285714285714) internal successors, (120), 20 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-06-05 03:57:34,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:57:34,345 INFO L225 Difference]: With dead ends: 22675 [2021-06-05 03:57:34,345 INFO L226 Difference]: Without dead ends: 22612 [2021-06-05 03:57:34,345 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 482.6ms TimeCoverageRelationStatistics Valid=390, Invalid=1866, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 03:57:34,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22612 states. [2021-06-05 03:57:34,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22612 to 15453. [2021-06-05 03:57:34,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15453 states, 15452 states have (on average 2.595392182241781) internal successors, (40104), 15452 states have internal predecessors, (40104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:34,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15453 states to 15453 states and 40104 transitions. [2021-06-05 03:57:34,576 INFO L78 Accepts]: Start accepts. Automaton has 15453 states and 40104 transitions. Word has length 62 [2021-06-05 03:57:34,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:57:34,576 INFO L482 AbstractCegarLoop]: Abstraction has 15453 states and 40104 transitions. [2021-06-05 03:57:34,576 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.714285714285714) internal successors, (120), 20 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:34,576 INFO L276 IsEmpty]: Start isEmpty. Operand 15453 states and 40104 transitions. [2021-06-05 03:57:34,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-06-05 03:57:34,585 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:57:34,585 INFO L521 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:57:34,785 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1196,558 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:57:34,786 INFO L430 AbstractCegarLoop]: === Iteration 567 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:57:34,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:57:34,786 INFO L82 PathProgramCache]: Analyzing trace with hash 436062055, now seen corresponding path program 345 times [2021-06-05 03:57:34,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:57:34,786 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896031987] [2021-06-05 03:57:34,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:57:34,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:57:34,856 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 194 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 03:57:34,856 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:57:34,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896031987] [2021-06-05 03:57:34,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896031987] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:34,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563450986] [2021-06-05 03:57:34,856 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 559 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 559 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:57:34,887 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-06-05 03:57:34,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:57:34,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 03:57:34,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:57:35,088 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 59 proven. 140 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:57:35,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563450986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:35,089 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:57:35,089 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-05 03:57:35,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879141263] [2021-06-05 03:57:35,089 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 03:57:35,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:57:35,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 03:57:35,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:57:35,089 INFO L87 Difference]: Start difference. First operand 15453 states and 40104 transitions. Second operand has 21 states, 21 states have (on average 5.714285714285714) internal successors, (120), 20 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:36,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:57:36,225 INFO L93 Difference]: Finished difference Result 23187 states and 55034 transitions. [2021-06-05 03:57:36,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 03:57:36,226 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.714285714285714) internal successors, (120), 20 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-06-05 03:57:36,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:57:36,252 INFO L225 Difference]: With dead ends: 23187 [2021-06-05 03:57:36,253 INFO L226 Difference]: Without dead ends: 23122 [2021-06-05 03:57:36,253 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 481.5ms TimeCoverageRelationStatistics Valid=390, Invalid=1866, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 03:57:36,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23122 states. [2021-06-05 03:57:36,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23122 to 16198. [2021-06-05 03:57:36,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16198 states, 16197 states have (on average 2.5986911156386987) internal successors, (42091), 16197 states have internal predecessors, (42091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:36,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16198 states to 16198 states and 42091 transitions. [2021-06-05 03:57:36,523 INFO L78 Accepts]: Start accepts. Automaton has 16198 states and 42091 transitions. Word has length 62 [2021-06-05 03:57:36,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:57:36,523 INFO L482 AbstractCegarLoop]: Abstraction has 16198 states and 42091 transitions. [2021-06-05 03:57:36,523 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.714285714285714) internal successors, (120), 20 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:36,523 INFO L276 IsEmpty]: Start isEmpty. Operand 16198 states and 42091 transitions. [2021-06-05 03:57:36,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-06-05 03:57:36,533 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:57:36,533 INFO L521 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:57:36,733 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1197,559 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:57:36,733 INFO L430 AbstractCegarLoop]: === Iteration 568 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:57:36,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:57:36,733 INFO L82 PathProgramCache]: Analyzing trace with hash -1292919549, now seen corresponding path program 346 times [2021-06-05 03:57:36,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:57:36,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766174474] [2021-06-05 03:57:36,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:57:36,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:57:36,803 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 03:57:36,803 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:57:36,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766174474] [2021-06-05 03:57:36,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766174474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:36,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771411266] [2021-06-05 03:57:36,804 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 560 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 560 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:57:36,830 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:57:36,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:57:36,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 03:57:36,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:57:36,902 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 03:57:36,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771411266] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:36,902 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:57:36,902 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 03:57:36,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557253847] [2021-06-05 03:57:36,902 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 03:57:36,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:57:36,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 03:57:36,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-06-05 03:57:36,903 INFO L87 Difference]: Start difference. First operand 16198 states and 42091 transitions. Second operand has 11 states, 11 states have (on average 5.545454545454546) internal successors, (61), 10 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:37,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:57:37,277 INFO L93 Difference]: Finished difference Result 18245 states and 46468 transitions. [2021-06-05 03:57:37,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 03:57:37,278 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.545454545454546) internal successors, (61), 10 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-06-05 03:57:37,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:57:37,298 INFO L225 Difference]: With dead ends: 18245 [2021-06-05 03:57:37,298 INFO L226 Difference]: Without dead ends: 18220 [2021-06-05 03:57:37,298 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 58.0ms TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-06-05 03:57:37,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18220 states. [2021-06-05 03:57:37,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18220 to 16907. [2021-06-05 03:57:37,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16907 states, 16906 states have (on average 2.594522654678812) internal successors, (43863), 16906 states have internal predecessors, (43863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:37,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16907 states to 16907 states and 43863 transitions. [2021-06-05 03:57:37,506 INFO L78 Accepts]: Start accepts. Automaton has 16907 states and 43863 transitions. Word has length 62 [2021-06-05 03:57:37,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:57:37,506 INFO L482 AbstractCegarLoop]: Abstraction has 16907 states and 43863 transitions. [2021-06-05 03:57:37,506 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.545454545454546) internal successors, (61), 10 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:37,506 INFO L276 IsEmpty]: Start isEmpty. Operand 16907 states and 43863 transitions. [2021-06-05 03:57:37,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 03:57:37,517 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:57:37,517 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:57:37,717 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 560 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1198 [2021-06-05 03:57:37,717 INFO L430 AbstractCegarLoop]: === Iteration 569 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:57:37,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:57:37,717 INFO L82 PathProgramCache]: Analyzing trace with hash 1959224392, now seen corresponding path program 164 times [2021-06-05 03:57:37,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:57:37,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851042578] [2021-06-05 03:57:37,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:57:37,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:57:37,898 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 9 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:57:37,898 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:57:37,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851042578] [2021-06-05 03:57:37,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851042578] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:37,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718870308] [2021-06-05 03:57:37,898 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 561 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 561 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:57:37,928 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:57:37,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:57:37,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 03:57:37,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:57:38,951 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 93 proven. 133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:57:38,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718870308] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:57:38,951 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:57:38,951 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 23] total 41 [2021-06-05 03:57:38,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420115378] [2021-06-05 03:57:38,951 INFO L462 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-06-05 03:57:38,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:57:38,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-06-05 03:57:38,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1563, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 03:57:38,952 INFO L87 Difference]: Start difference. First operand 16907 states and 43863 transitions. Second operand has 42 states, 42 states have (on average 2.9047619047619047) internal successors, (122), 41 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:57:59,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:57:59,960 INFO L93 Difference]: Finished difference Result 40647 states and 93712 transitions. [2021-06-05 03:57:59,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 408 states. [2021-06-05 03:57:59,960 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.9047619047619047) internal successors, (122), 41 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 03:57:59,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:58:00,001 INFO L225 Difference]: With dead ends: 40647 [2021-06-05 03:58:00,002 INFO L226 Difference]: Without dead ends: 39783 [2021-06-05 03:58:00,010 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 477 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 433 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80537 ImplicationChecksByTransitivity, 18612.0ms TimeCoverageRelationStatistics Valid=22109, Invalid=166681, Unknown=0, NotChecked=0, Total=188790 [2021-06-05 03:58:00,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39783 states. [2021-06-05 03:58:00,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39783 to 20292. [2021-06-05 03:58:00,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20292 states, 20291 states have (on average 2.6370311960967916) internal successors, (53508), 20291 states have internal predecessors, (53508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:00,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20292 states to 20292 states and 53508 transitions. [2021-06-05 03:58:00,467 INFO L78 Accepts]: Start accepts. Automaton has 20292 states and 53508 transitions. Word has length 65 [2021-06-05 03:58:00,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:58:00,467 INFO L482 AbstractCegarLoop]: Abstraction has 20292 states and 53508 transitions. [2021-06-05 03:58:00,467 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 2.9047619047619047) internal successors, (122), 41 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:00,467 INFO L276 IsEmpty]: Start isEmpty. Operand 20292 states and 53508 transitions. [2021-06-05 03:58:00,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 03:58:00,481 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:58:00,481 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:58:00,681 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 561 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1199 [2021-06-05 03:58:00,681 INFO L430 AbstractCegarLoop]: === Iteration 570 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:58:00,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:58:00,681 INFO L82 PathProgramCache]: Analyzing trace with hash -1290275768, now seen corresponding path program 347 times [2021-06-05 03:58:00,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:58:00,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202145920] [2021-06-05 03:58:00,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:58:00,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:00,875 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 19 proven. 207 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:00,875 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:58:00,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202145920] [2021-06-05 03:58:00,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202145920] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:00,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398608891] [2021-06-05 03:58:00,875 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 562 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 562 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:00,906 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-06-05 03:58:00,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:58:00,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 03:58:00,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:58:01,251 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 17 proven. 209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:01,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398608891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:01,251 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:58:01,251 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 28 [2021-06-05 03:58:01,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488584184] [2021-06-05 03:58:01,251 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 03:58:01,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:58:01,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 03:58:01,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=739, Unknown=0, NotChecked=0, Total=812 [2021-06-05 03:58:01,252 INFO L87 Difference]: Start difference. First operand 20292 states and 53508 transitions. Second operand has 29 states, 29 states have (on average 3.2413793103448274) internal successors, (94), 28 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:02,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:58:02,555 INFO L93 Difference]: Finished difference Result 20618 states and 54021 transitions. [2021-06-05 03:58:02,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 03:58:02,555 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.2413793103448274) internal successors, (94), 28 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 03:58:02,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:58:02,577 INFO L225 Difference]: With dead ends: 20618 [2021-06-05 03:58:02,577 INFO L226 Difference]: Without dead ends: 20502 [2021-06-05 03:58:02,578 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 388.4ms TimeCoverageRelationStatistics Valid=73, Invalid=739, Unknown=0, NotChecked=0, Total=812 [2021-06-05 03:58:02,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20502 states. [2021-06-05 03:58:02,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20502 to 20276. [2021-06-05 03:58:02,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20276 states, 20275 states have (on average 2.635906288532676) internal successors, (53443), 20275 states have internal predecessors, (53443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:02,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20276 states to 20276 states and 53443 transitions. [2021-06-05 03:58:02,833 INFO L78 Accepts]: Start accepts. Automaton has 20276 states and 53443 transitions. Word has length 65 [2021-06-05 03:58:02,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:58:02,833 INFO L482 AbstractCegarLoop]: Abstraction has 20276 states and 53443 transitions. [2021-06-05 03:58:02,833 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 3.2413793103448274) internal successors, (94), 28 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:02,833 INFO L276 IsEmpty]: Start isEmpty. Operand 20276 states and 53443 transitions. [2021-06-05 03:58:02,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 03:58:02,848 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:58:02,848 INFO L521 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:58:03,048 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 562 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1212 [2021-06-05 03:58:03,048 INFO L430 AbstractCegarLoop]: === Iteration 571 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:58:03,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:58:03,048 INFO L82 PathProgramCache]: Analyzing trace with hash 708589307, now seen corresponding path program 165 times [2021-06-05 03:58:03,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:58:03,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130390668] [2021-06-05 03:58:03,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:58:03,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:03,128 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 104 proven. 123 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:58:03,128 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:58:03,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130390668] [2021-06-05 03:58:03,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130390668] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:03,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61657919] [2021-06-05 03:58:03,128 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 563 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 563 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:03,158 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-05 03:58:03,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:58:03,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 03:58:03,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:58:03,249 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 105 proven. 123 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:03,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61657919] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:03,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:58:03,249 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2021-06-05 03:58:03,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440031090] [2021-06-05 03:58:03,250 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:58:03,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:58:03,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:58:03,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:58:03,250 INFO L87 Difference]: Start difference. First operand 20276 states and 53443 transitions. Second operand has 14 states, 14 states have (on average 5.0) internal successors, (70), 13 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:03,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:58:03,451 INFO L93 Difference]: Finished difference Result 27245 states and 66968 transitions. [2021-06-05 03:58:03,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 03:58:03,452 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.0) internal successors, (70), 13 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 03:58:03,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:58:03,483 INFO L225 Difference]: With dead ends: 27245 [2021-06-05 03:58:03,484 INFO L226 Difference]: Without dead ends: 27235 [2021-06-05 03:58:03,484 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 85.0ms TimeCoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:58:03,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27235 states. [2021-06-05 03:58:03,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27235 to 20359. [2021-06-05 03:58:03,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20359 states, 20358 states have (on average 2.638324000392966) internal successors, (53711), 20358 states have internal predecessors, (53711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:03,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20359 states to 20359 states and 53711 transitions. [2021-06-05 03:58:03,780 INFO L78 Accepts]: Start accepts. Automaton has 20359 states and 53711 transitions. Word has length 65 [2021-06-05 03:58:03,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:58:03,780 INFO L482 AbstractCegarLoop]: Abstraction has 20359 states and 53711 transitions. [2021-06-05 03:58:03,780 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.0) internal successors, (70), 13 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:03,780 INFO L276 IsEmpty]: Start isEmpty. Operand 20359 states and 53711 transitions. [2021-06-05 03:58:03,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 03:58:03,794 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:58:03,794 INFO L521 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:58:03,995 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 563 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1213 [2021-06-05 03:58:03,995 INFO L430 AbstractCegarLoop]: === Iteration 572 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:58:03,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:58:03,995 INFO L82 PathProgramCache]: Analyzing trace with hash -248603333, now seen corresponding path program 166 times [2021-06-05 03:58:03,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:58:03,995 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78855997] [2021-06-05 03:58:03,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:58:03,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:04,071 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 128 proven. 99 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:58:04,072 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:58:04,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78855997] [2021-06-05 03:58:04,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78855997] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:04,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621774458] [2021-06-05 03:58:04,072 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 564 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 564 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:04,098 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:58:04,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:58:04,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 03:58:04,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:58:04,190 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 129 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:04,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621774458] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:04,191 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:58:04,191 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2021-06-05 03:58:04,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152583964] [2021-06-05 03:58:04,191 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:58:04,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:58:04,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:58:04,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=110, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:58:04,191 INFO L87 Difference]: Start difference. First operand 20359 states and 53711 transitions. Second operand has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:04,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:58:04,406 INFO L93 Difference]: Finished difference Result 30078 states and 74504 transitions. [2021-06-05 03:58:04,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 03:58:04,406 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 03:58:04,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:58:04,442 INFO L225 Difference]: With dead ends: 30078 [2021-06-05 03:58:04,442 INFO L226 Difference]: Without dead ends: 30078 [2021-06-05 03:58:04,442 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 80.6ms TimeCoverageRelationStatistics Valid=86, Invalid=124, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:58:04,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30078 states. [2021-06-05 03:58:04,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30078 to 22013. [2021-06-05 03:58:04,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22013 states, 22012 states have (on average 2.6694075958568053) internal successors, (58759), 22012 states have internal predecessors, (58759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:04,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22013 states to 22013 states and 58759 transitions. [2021-06-05 03:58:04,815 INFO L78 Accepts]: Start accepts. Automaton has 22013 states and 58759 transitions. Word has length 65 [2021-06-05 03:58:04,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:58:04,815 INFO L482 AbstractCegarLoop]: Abstraction has 22013 states and 58759 transitions. [2021-06-05 03:58:04,815 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:04,815 INFO L276 IsEmpty]: Start isEmpty. Operand 22013 states and 58759 transitions. [2021-06-05 03:58:04,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 03:58:04,830 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:58:04,830 INFO L521 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:58:05,030 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 564 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1216 [2021-06-05 03:58:05,030 INFO L430 AbstractCegarLoop]: === Iteration 573 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:58:05,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:58:05,031 INFO L82 PathProgramCache]: Analyzing trace with hash -782468709, now seen corresponding path program 348 times [2021-06-05 03:58:05,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:58:05,031 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852225919] [2021-06-05 03:58:05,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:58:05,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:05,109 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 111 proven. 116 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:58:05,109 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:58:05,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852225919] [2021-06-05 03:58:05,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852225919] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:05,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098684566] [2021-06-05 03:58:05,110 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 565 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 565 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:05,140 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-05 03:58:05,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:58:05,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 03:58:05,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:58:05,223 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 111 proven. 116 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:58:05,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098684566] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:05,224 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:58:05,224 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-06-05 03:58:05,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509694621] [2021-06-05 03:58:05,224 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 03:58:05,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:58:05,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 03:58:05,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:58:05,224 INFO L87 Difference]: Start difference. First operand 22013 states and 58759 transitions. Second operand has 13 states, 13 states have (on average 5.0) internal successors, (65), 12 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:05,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:58:05,485 INFO L93 Difference]: Finished difference Result 23642 states and 61469 transitions. [2021-06-05 03:58:05,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 03:58:05,486 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.0) internal successors, (65), 12 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 03:58:05,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:58:05,514 INFO L225 Difference]: With dead ends: 23642 [2021-06-05 03:58:05,514 INFO L226 Difference]: Without dead ends: 23636 [2021-06-05 03:58:05,514 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 72.5ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:58:05,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23636 states. [2021-06-05 03:58:05,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23636 to 21888. [2021-06-05 03:58:05,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21888 states, 21887 states have (on average 2.666971261479417) internal successors, (58372), 21887 states have internal predecessors, (58372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:05,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21888 states to 21888 states and 58372 transitions. [2021-06-05 03:58:05,818 INFO L78 Accepts]: Start accepts. Automaton has 21888 states and 58372 transitions. Word has length 65 [2021-06-05 03:58:05,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:58:05,818 INFO L482 AbstractCegarLoop]: Abstraction has 21888 states and 58372 transitions. [2021-06-05 03:58:05,818 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.0) internal successors, (65), 12 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:05,818 INFO L276 IsEmpty]: Start isEmpty. Operand 21888 states and 58372 transitions. [2021-06-05 03:58:05,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 03:58:05,833 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:58:05,833 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:58:06,033 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1217,565 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:06,036 INFO L430 AbstractCegarLoop]: === Iteration 574 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:58:06,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:58:06,036 INFO L82 PathProgramCache]: Analyzing trace with hash 855335590, now seen corresponding path program 167 times [2021-06-05 03:58:06,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:58:06,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394362246] [2021-06-05 03:58:06,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:58:06,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:06,138 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 10 proven. 213 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:58:06,138 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:58:06,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394362246] [2021-06-05 03:58:06,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394362246] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:06,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73788176] [2021-06-05 03:58:06,138 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 566 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 566 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:06,171 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-06-05 03:58:06,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:58:06,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 03:58:06,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:58:06,258 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 9 proven. 214 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:58:06,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73788176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:06,258 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:58:06,259 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 03:58:06,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163378708] [2021-06-05 03:58:06,259 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 03:58:06,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:58:06,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 03:58:06,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:58:06,259 INFO L87 Difference]: Start difference. First operand 21888 states and 58372 transitions. Second operand has 13 states, 13 states have (on average 5.0) internal successors, (65), 12 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:06,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:58:06,849 INFO L93 Difference]: Finished difference Result 24640 states and 63599 transitions. [2021-06-05 03:58:06,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 03:58:06,849 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.0) internal successors, (65), 12 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 03:58:06,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:58:06,879 INFO L225 Difference]: With dead ends: 24640 [2021-06-05 03:58:06,880 INFO L226 Difference]: Without dead ends: 24581 [2021-06-05 03:58:06,880 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 161.7ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:58:06,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24581 states. [2021-06-05 03:58:07,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24581 to 22019. [2021-06-05 03:58:07,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22019 states, 22018 states have (on average 2.66618221455173) internal successors, (58704), 22018 states have internal predecessors, (58704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:07,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22019 states to 22019 states and 58704 transitions. [2021-06-05 03:58:07,204 INFO L78 Accepts]: Start accepts. Automaton has 22019 states and 58704 transitions. Word has length 65 [2021-06-05 03:58:07,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:58:07,204 INFO L482 AbstractCegarLoop]: Abstraction has 22019 states and 58704 transitions. [2021-06-05 03:58:07,204 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.0) internal successors, (65), 12 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:07,204 INFO L276 IsEmpty]: Start isEmpty. Operand 22019 states and 58704 transitions. [2021-06-05 03:58:07,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 03:58:07,219 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:58:07,219 INFO L521 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:58:07,420 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 566 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1220 [2021-06-05 03:58:07,420 INFO L430 AbstractCegarLoop]: === Iteration 575 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:58:07,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:58:07,420 INFO L82 PathProgramCache]: Analyzing trace with hash -698361267, now seen corresponding path program 349 times [2021-06-05 03:58:07,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:58:07,420 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860099101] [2021-06-05 03:58:07,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:58:07,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:07,486 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 105 proven. 118 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 03:58:07,487 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:58:07,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860099101] [2021-06-05 03:58:07,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860099101] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:07,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701712839] [2021-06-05 03:58:07,487 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 567 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 567 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:07,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:07,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 03:58:07,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:58:07,597 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 105 proven. 118 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 03:58:07,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701712839] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:07,597 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:58:07,597 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 03:58:07,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721545680] [2021-06-05 03:58:07,597 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 03:58:07,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:58:07,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 03:58:07,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:58:07,598 INFO L87 Difference]: Start difference. First operand 22019 states and 58704 transitions. Second operand has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 11 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:07,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:58:07,847 INFO L93 Difference]: Finished difference Result 25003 states and 63786 transitions. [2021-06-05 03:58:07,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 03:58:07,847 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 11 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 03:58:07,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:58:07,873 INFO L225 Difference]: With dead ends: 25003 [2021-06-05 03:58:07,873 INFO L226 Difference]: Without dead ends: 25000 [2021-06-05 03:58:07,873 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 59.9ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:58:07,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25000 states. [2021-06-05 03:58:08,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25000 to 21981. [2021-06-05 03:58:08,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21981 states, 21980 states have (on average 2.664649681528662) internal successors, (58569), 21980 states have internal predecessors, (58569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:08,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21981 states to 21981 states and 58569 transitions. [2021-06-05 03:58:08,177 INFO L78 Accepts]: Start accepts. Automaton has 21981 states and 58569 transitions. Word has length 65 [2021-06-05 03:58:08,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:58:08,177 INFO L482 AbstractCegarLoop]: Abstraction has 21981 states and 58569 transitions. [2021-06-05 03:58:08,177 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 11 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:08,177 INFO L276 IsEmpty]: Start isEmpty. Operand 21981 states and 58569 transitions. [2021-06-05 03:58:08,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 03:58:08,193 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:58:08,193 INFO L521 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:58:08,393 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 567 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1221 [2021-06-05 03:58:08,393 INFO L430 AbstractCegarLoop]: === Iteration 576 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:58:08,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:58:08,393 INFO L82 PathProgramCache]: Analyzing trace with hash -491298701, now seen corresponding path program 350 times [2021-06-05 03:58:08,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:58:08,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126727846] [2021-06-05 03:58:08,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:58:08,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:08,467 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 102 proven. 121 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 03:58:08,467 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:58:08,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126727846] [2021-06-05 03:58:08,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126727846] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:08,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176206367] [2021-06-05 03:58:08,467 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 568 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 568 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:08,494 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:58:08,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:58:08,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 03:58:08,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:58:08,577 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 102 proven. 121 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 03:58:08,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176206367] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:08,578 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:58:08,578 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-06-05 03:58:08,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119816452] [2021-06-05 03:58:08,578 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 03:58:08,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:58:08,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 03:58:08,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:58:08,578 INFO L87 Difference]: Start difference. First operand 21981 states and 58569 transitions. Second operand has 13 states, 13 states have (on average 4.769230769230769) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:08,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:58:08,829 INFO L93 Difference]: Finished difference Result 24995 states and 63690 transitions. [2021-06-05 03:58:08,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 03:58:08,829 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.769230769230769) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 03:58:08,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:58:08,858 INFO L225 Difference]: With dead ends: 24995 [2021-06-05 03:58:08,858 INFO L226 Difference]: Without dead ends: 24977 [2021-06-05 03:58:08,859 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 82.3ms TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:58:08,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24977 states. [2021-06-05 03:58:09,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24977 to 21595. [2021-06-05 03:58:09,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21595 states, 21594 states have (on average 2.658840418634806) internal successors, (57415), 21594 states have internal predecessors, (57415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:09,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21595 states to 21595 states and 57415 transitions. [2021-06-05 03:58:09,168 INFO L78 Accepts]: Start accepts. Automaton has 21595 states and 57415 transitions. Word has length 65 [2021-06-05 03:58:09,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:58:09,168 INFO L482 AbstractCegarLoop]: Abstraction has 21595 states and 57415 transitions. [2021-06-05 03:58:09,168 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.769230769230769) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:09,169 INFO L276 IsEmpty]: Start isEmpty. Operand 21595 states and 57415 transitions. [2021-06-05 03:58:09,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 03:58:09,183 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:58:09,183 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:58:09,383 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 568 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1223 [2021-06-05 03:58:09,384 INFO L430 AbstractCegarLoop]: === Iteration 577 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:58:09,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:58:09,384 INFO L82 PathProgramCache]: Analyzing trace with hash -1939298714, now seen corresponding path program 351 times [2021-06-05 03:58:09,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:58:09,384 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277649679] [2021-06-05 03:58:09,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:58:09,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:09,477 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 22 proven. 201 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:58:09,477 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:58:09,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277649679] [2021-06-05 03:58:09,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277649679] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:09,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314853427] [2021-06-05 03:58:09,478 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 569 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 569 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:09,508 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-06-05 03:58:09,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:58:09,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 03:58:09,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:58:09,606 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 17 proven. 206 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:58:09,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314853427] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:09,606 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:58:09,607 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 03:58:09,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872160829] [2021-06-05 03:58:09,607 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 03:58:09,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:58:09,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 03:58:09,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:58:09,607 INFO L87 Difference]: Start difference. First operand 21595 states and 57415 transitions. Second operand has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 12 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:10,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:58:10,380 INFO L93 Difference]: Finished difference Result 23174 states and 60158 transitions. [2021-06-05 03:58:10,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 03:58:10,380 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 12 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 03:58:10,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:58:10,406 INFO L225 Difference]: With dead ends: 23174 [2021-06-05 03:58:10,406 INFO L226 Difference]: Without dead ends: 23136 [2021-06-05 03:58:10,406 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 161.0ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:58:10,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23136 states. [2021-06-05 03:58:10,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23136 to 21566. [2021-06-05 03:58:10,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21566 states, 21565 states have (on average 2.658567122652446) internal successors, (57332), 21565 states have internal predecessors, (57332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:10,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21566 states to 21566 states and 57332 transitions. [2021-06-05 03:58:10,711 INFO L78 Accepts]: Start accepts. Automaton has 21566 states and 57332 transitions. Word has length 65 [2021-06-05 03:58:10,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:58:10,711 INFO L482 AbstractCegarLoop]: Abstraction has 21566 states and 57332 transitions. [2021-06-05 03:58:10,711 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 12 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:10,711 INFO L276 IsEmpty]: Start isEmpty. Operand 21566 states and 57332 transitions. [2021-06-05 03:58:10,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 03:58:10,727 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:58:10,727 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:58:10,927 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 569 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1226 [2021-06-05 03:58:10,927 INFO L430 AbstractCegarLoop]: === Iteration 578 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:58:10,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:58:10,927 INFO L82 PathProgramCache]: Analyzing trace with hash 1742132402, now seen corresponding path program 352 times [2021-06-05 03:58:10,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:58:10,928 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766143279] [2021-06-05 03:58:10,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:58:10,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:11,031 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 19 proven. 202 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 03:58:11,031 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:58:11,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766143279] [2021-06-05 03:58:11,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766143279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:11,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276949189] [2021-06-05 03:58:11,031 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 570 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 570 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:11,058 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:58:11,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:58:11,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 03:58:11,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:58:11,228 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 203 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 03:58:11,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276949189] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:11,228 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:58:11,228 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 03:58:11,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450221168] [2021-06-05 03:58:11,229 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 03:58:11,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:58:11,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 03:58:11,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:58:11,229 INFO L87 Difference]: Start difference. First operand 21566 states and 57332 transitions. Second operand has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:11,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:58:11,833 INFO L93 Difference]: Finished difference Result 23637 states and 61214 transitions. [2021-06-05 03:58:11,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 03:58:11,833 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 03:58:11,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:58:11,859 INFO L225 Difference]: With dead ends: 23637 [2021-06-05 03:58:11,859 INFO L226 Difference]: Without dead ends: 23625 [2021-06-05 03:58:11,860 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 158.2ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:58:11,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23625 states. [2021-06-05 03:58:12,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23625 to 21570. [2021-06-05 03:58:12,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21570 states, 21569 states have (on average 2.6583059019889657) internal successors, (57337), 21569 states have internal predecessors, (57337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:12,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21570 states to 21570 states and 57337 transitions. [2021-06-05 03:58:12,154 INFO L78 Accepts]: Start accepts. Automaton has 21570 states and 57337 transitions. Word has length 65 [2021-06-05 03:58:12,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:58:12,154 INFO L482 AbstractCegarLoop]: Abstraction has 21570 states and 57337 transitions. [2021-06-05 03:58:12,155 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:12,155 INFO L276 IsEmpty]: Start isEmpty. Operand 21570 states and 57337 transitions. [2021-06-05 03:58:12,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 03:58:12,171 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:58:12,171 INFO L521 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:58:12,371 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1227,570 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:12,371 INFO L430 AbstractCegarLoop]: === Iteration 579 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:58:12,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:58:12,371 INFO L82 PathProgramCache]: Analyzing trace with hash 1584832915, now seen corresponding path program 168 times [2021-06-05 03:58:12,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:58:12,372 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572771902] [2021-06-05 03:58:12,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:58:12,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:12,446 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 111 proven. 115 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:58:12,446 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:58:12,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572771902] [2021-06-05 03:58:12,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572771902] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:12,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537967749] [2021-06-05 03:58:12,447 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 571 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 571 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:12,476 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-05 03:58:12,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:58:12,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 03:58:12,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:58:12,589 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 113 proven. 115 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:12,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537967749] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:12,589 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:58:12,589 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 16 [2021-06-05 03:58:12,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542642392] [2021-06-05 03:58:12,590 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 03:58:12,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:58:12,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 03:58:12,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:58:12,590 INFO L87 Difference]: Start difference. First operand 21570 states and 57337 transitions. Second operand has 17 states, 17 states have (on average 4.588235294117647) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:12,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:58:12,857 INFO L93 Difference]: Finished difference Result 28789 states and 71294 transitions. [2021-06-05 03:58:12,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 03:58:12,857 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.588235294117647) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 03:58:12,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:58:12,889 INFO L225 Difference]: With dead ends: 28789 [2021-06-05 03:58:12,889 INFO L226 Difference]: Without dead ends: 28769 [2021-06-05 03:58:12,889 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 112.6ms TimeCoverageRelationStatistics Valid=139, Invalid=241, Unknown=0, NotChecked=0, Total=380 [2021-06-05 03:58:12,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28769 states. [2021-06-05 03:58:13,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28769 to 21641. [2021-06-05 03:58:13,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21641 states, 21640 states have (on average 2.6605822550831792) internal successors, (57575), 21640 states have internal predecessors, (57575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:13,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21641 states to 21641 states and 57575 transitions. [2021-06-05 03:58:13,211 INFO L78 Accepts]: Start accepts. Automaton has 21641 states and 57575 transitions. Word has length 65 [2021-06-05 03:58:13,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:58:13,211 INFO L482 AbstractCegarLoop]: Abstraction has 21641 states and 57575 transitions. [2021-06-05 03:58:13,211 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.588235294117647) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:13,211 INFO L276 IsEmpty]: Start isEmpty. Operand 21641 states and 57575 transitions. [2021-06-05 03:58:13,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 03:58:13,226 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:58:13,226 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:58:13,426 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 571 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1228 [2021-06-05 03:58:13,426 INFO L430 AbstractCegarLoop]: === Iteration 580 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:58:13,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:58:13,426 INFO L82 PathProgramCache]: Analyzing trace with hash -410917560, now seen corresponding path program 353 times [2021-06-05 03:58:13,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:58:13,426 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330927026] [2021-06-05 03:58:13,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:58:13,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:13,524 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 207 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:58:13,524 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:58:13,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330927026] [2021-06-05 03:58:13,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330927026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:13,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818063784] [2021-06-05 03:58:13,524 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 572 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 572 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:13,556 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-06-05 03:58:13,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:58:13,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 03:58:13,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:58:13,642 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 207 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:58:13,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818063784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:13,642 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:58:13,642 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 03:58:13,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137221802] [2021-06-05 03:58:13,642 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:58:13,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:58:13,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:58:13,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:58:13,643 INFO L87 Difference]: Start difference. First operand 21641 states and 57575 transitions. Second operand has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 13 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:14,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:58:14,394 INFO L93 Difference]: Finished difference Result 24593 states and 63329 transitions. [2021-06-05 03:58:14,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 03:58:14,394 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 13 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 03:58:14,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:58:14,423 INFO L225 Difference]: With dead ends: 24593 [2021-06-05 03:58:14,423 INFO L226 Difference]: Without dead ends: 24581 [2021-06-05 03:58:14,423 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 70 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 186.8ms TimeCoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-06-05 03:58:14,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24581 states. [2021-06-05 03:58:14,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24581 to 21673. [2021-06-05 03:58:14,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21673 states, 21672 states have (on average 2.6601605758582503) internal successors, (57651), 21672 states have internal predecessors, (57651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:14,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21673 states to 21673 states and 57651 transitions. [2021-06-05 03:58:14,768 INFO L78 Accepts]: Start accepts. Automaton has 21673 states and 57651 transitions. Word has length 65 [2021-06-05 03:58:14,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:58:14,768 INFO L482 AbstractCegarLoop]: Abstraction has 21673 states and 57651 transitions. [2021-06-05 03:58:14,768 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 13 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:14,768 INFO L276 IsEmpty]: Start isEmpty. Operand 21673 states and 57651 transitions. [2021-06-05 03:58:14,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 03:58:14,782 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:58:14,782 INFO L521 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:58:14,983 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 572 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1231 [2021-06-05 03:58:14,983 INFO L430 AbstractCegarLoop]: === Iteration 581 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:58:14,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:58:14,983 INFO L82 PathProgramCache]: Analyzing trace with hash -1270859487, now seen corresponding path program 169 times [2021-06-05 03:58:14,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:58:14,983 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562908936] [2021-06-05 03:58:14,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:58:14,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:15,056 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 135 proven. 91 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:58:15,056 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:58:15,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562908936] [2021-06-05 03:58:15,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562908936] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:15,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581772576] [2021-06-05 03:58:15,056 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 573 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 573 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:15,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:15,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 03:58:15,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:58:15,177 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 136 proven. 91 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:58:15,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581772576] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:15,177 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:58:15,177 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2021-06-05 03:58:15,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850421] [2021-06-05 03:58:15,177 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:58:15,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:58:15,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:58:15,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=109, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:58:15,178 INFO L87 Difference]: Start difference. First operand 21673 states and 57651 transitions. Second operand has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:15,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:58:15,446 INFO L93 Difference]: Finished difference Result 31661 states and 78137 transitions. [2021-06-05 03:58:15,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 03:58:15,446 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 03:58:15,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:58:15,483 INFO L225 Difference]: With dead ends: 31661 [2021-06-05 03:58:15,483 INFO L226 Difference]: Without dead ends: 31661 [2021-06-05 03:58:15,483 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 83.0ms TimeCoverageRelationStatistics Valid=101, Invalid=139, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:58:15,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31661 states. [2021-06-05 03:58:15,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31661 to 21919. [2021-06-05 03:58:15,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21919 states, 21918 states have (on average 2.6655260516470483) internal successors, (58423), 21918 states have internal predecessors, (58423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:15,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21919 states to 21919 states and 58423 transitions. [2021-06-05 03:58:15,822 INFO L78 Accepts]: Start accepts. Automaton has 21919 states and 58423 transitions. Word has length 65 [2021-06-05 03:58:15,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:58:15,822 INFO L482 AbstractCegarLoop]: Abstraction has 21919 states and 58423 transitions. [2021-06-05 03:58:15,822 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:15,822 INFO L276 IsEmpty]: Start isEmpty. Operand 21919 states and 58423 transitions. [2021-06-05 03:58:15,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 03:58:15,837 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:58:15,837 INFO L521 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:58:16,037 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1232,573 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:16,037 INFO L430 AbstractCegarLoop]: === Iteration 582 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:58:16,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:58:16,037 INFO L82 PathProgramCache]: Analyzing trace with hash 1386535353, now seen corresponding path program 170 times [2021-06-05 03:58:16,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:58:16,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066327171] [2021-06-05 03:58:16,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:58:16,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:16,118 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 129 proven. 98 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:58:16,118 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:58:16,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066327171] [2021-06-05 03:58:16,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066327171] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:16,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376635468] [2021-06-05 03:58:16,118 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 574 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 574 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:16,145 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:58:16,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:58:16,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 03:58:16,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:58:16,238 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 130 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:16,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376635468] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:16,238 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:58:16,238 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 14 [2021-06-05 03:58:16,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104659619] [2021-06-05 03:58:16,238 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 03:58:16,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:58:16,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 03:58:16,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=134, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:58:16,238 INFO L87 Difference]: Start difference. First operand 21919 states and 58423 transitions. Second operand has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:16,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:58:16,520 INFO L93 Difference]: Finished difference Result 29555 states and 73447 transitions. [2021-06-05 03:58:16,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 03:58:16,521 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 03:58:16,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:58:16,556 INFO L225 Difference]: With dead ends: 29555 [2021-06-05 03:58:16,556 INFO L226 Difference]: Without dead ends: 29555 [2021-06-05 03:58:16,557 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 98.8ms TimeCoverageRelationStatistics Valid=121, Invalid=185, Unknown=0, NotChecked=0, Total=306 [2021-06-05 03:58:16,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29555 states. [2021-06-05 03:58:16,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29555 to 21626. [2021-06-05 03:58:16,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21626 states, 21625 states have (on average 2.6610404624277457) internal successors, (57545), 21625 states have internal predecessors, (57545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:16,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21626 states to 21626 states and 57545 transitions. [2021-06-05 03:58:16,881 INFO L78 Accepts]: Start accepts. Automaton has 21626 states and 57545 transitions. Word has length 65 [2021-06-05 03:58:16,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:58:16,882 INFO L482 AbstractCegarLoop]: Abstraction has 21626 states and 57545 transitions. [2021-06-05 03:58:16,882 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:16,882 INFO L276 IsEmpty]: Start isEmpty. Operand 21626 states and 57545 transitions. [2021-06-05 03:58:16,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 03:58:16,896 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:58:16,896 INFO L521 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:58:17,097 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 574 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1233 [2021-06-05 03:58:17,097 INFO L430 AbstractCegarLoop]: === Iteration 583 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:58:17,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:58:17,097 INFO L82 PathProgramCache]: Analyzing trace with hash 1121641549, now seen corresponding path program 354 times [2021-06-05 03:58:17,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:58:17,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746975388] [2021-06-05 03:58:17,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:58:17,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:17,178 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 104 proven. 123 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:58:17,179 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:58:17,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746975388] [2021-06-05 03:58:17,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746975388] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:17,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859774341] [2021-06-05 03:58:17,179 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 575 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 575 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:17,209 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-05 03:58:17,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:58:17,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 03:58:17,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:58:17,294 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 104 proven. 123 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:58:17,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859774341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:17,294 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:58:17,294 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-06-05 03:58:17,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234233723] [2021-06-05 03:58:17,294 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:58:17,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:58:17,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:58:17,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:58:17,294 INFO L87 Difference]: Start difference. First operand 21626 states and 57545 transitions. Second operand has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 13 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:17,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:58:17,529 INFO L93 Difference]: Finished difference Result 24366 states and 62196 transitions. [2021-06-05 03:58:17,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 03:58:17,529 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 13 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 03:58:17,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:58:17,556 INFO L225 Difference]: With dead ends: 24366 [2021-06-05 03:58:17,556 INFO L226 Difference]: Without dead ends: 24348 [2021-06-05 03:58:17,556 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 90.0ms TimeCoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:58:17,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24348 states. [2021-06-05 03:58:17,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24348 to 21626. [2021-06-05 03:58:17,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21626 states, 21625 states have (on average 2.660578034682081) internal successors, (57535), 21625 states have internal predecessors, (57535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:17,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21626 states to 21626 states and 57535 transitions. [2021-06-05 03:58:17,893 INFO L78 Accepts]: Start accepts. Automaton has 21626 states and 57535 transitions. Word has length 65 [2021-06-05 03:58:17,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:58:17,894 INFO L482 AbstractCegarLoop]: Abstraction has 21626 states and 57535 transitions. [2021-06-05 03:58:17,894 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 13 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:17,894 INFO L276 IsEmpty]: Start isEmpty. Operand 21626 states and 57535 transitions. [2021-06-05 03:58:17,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 03:58:17,908 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:58:17,908 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:58:18,108 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1234,575 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:18,108 INFO L430 AbstractCegarLoop]: === Iteration 584 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:58:18,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:58:18,108 INFO L82 PathProgramCache]: Analyzing trace with hash 1172605066, now seen corresponding path program 171 times [2021-06-05 03:58:18,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:58:18,108 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656582034] [2021-06-05 03:58:18,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:58:18,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:18,206 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 10 proven. 213 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:58:18,207 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:58:18,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656582034] [2021-06-05 03:58:18,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656582034] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:18,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942808455] [2021-06-05 03:58:18,207 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 576 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 576 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:18,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-06-05 03:58:18,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:58:18,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 03:58:18,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:58:18,327 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 9 proven. 214 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:58:18,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942808455] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:18,328 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:58:18,328 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 03:58:18,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466639894] [2021-06-05 03:58:18,328 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 03:58:18,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:58:18,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 03:58:18,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:58:18,328 INFO L87 Difference]: Start difference. First operand 21626 states and 57535 transitions. Second operand has 13 states, 13 states have (on average 5.0) internal successors, (65), 12 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:18,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:58:18,916 INFO L93 Difference]: Finished difference Result 24595 states and 63247 transitions. [2021-06-05 03:58:18,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 03:58:18,916 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.0) internal successors, (65), 12 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 03:58:18,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:58:18,944 INFO L225 Difference]: With dead ends: 24595 [2021-06-05 03:58:18,944 INFO L226 Difference]: Without dead ends: 24545 [2021-06-05 03:58:18,945 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 159.7ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:58:18,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24545 states. [2021-06-05 03:58:19,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24545 to 21849. [2021-06-05 03:58:19,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21849 states, 21848 states have (on average 2.659602709630172) internal successors, (58107), 21848 states have internal predecessors, (58107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:19,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21849 states to 21849 states and 58107 transitions. [2021-06-05 03:58:19,257 INFO L78 Accepts]: Start accepts. Automaton has 21849 states and 58107 transitions. Word has length 65 [2021-06-05 03:58:19,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:58:19,257 INFO L482 AbstractCegarLoop]: Abstraction has 21849 states and 58107 transitions. [2021-06-05 03:58:19,257 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.0) internal successors, (65), 12 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:19,257 INFO L276 IsEmpty]: Start isEmpty. Operand 21849 states and 58107 transitions. [2021-06-05 03:58:19,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 03:58:19,271 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:58:19,271 INFO L521 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:58:19,471 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 576 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1238 [2021-06-05 03:58:19,472 INFO L430 AbstractCegarLoop]: === Iteration 585 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:58:19,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:58:19,472 INFO L82 PathProgramCache]: Analyzing trace with hash -381091791, now seen corresponding path program 355 times [2021-06-05 03:58:19,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:58:19,472 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349549553] [2021-06-05 03:58:19,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:58:19,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:19,535 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 89 proven. 134 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 03:58:19,535 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:58:19,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349549553] [2021-06-05 03:58:19,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349549553] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:19,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663208304] [2021-06-05 03:58:19,535 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 577 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 577 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:19,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:19,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 03:58:19,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:58:19,646 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 89 proven. 134 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 03:58:19,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663208304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:19,646 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:58:19,646 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 03:58:19,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162743478] [2021-06-05 03:58:19,646 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 03:58:19,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:58:19,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 03:58:19,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:58:19,646 INFO L87 Difference]: Start difference. First operand 21849 states and 58107 transitions. Second operand has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 11 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:19,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:58:19,844 INFO L93 Difference]: Finished difference Result 25610 states and 64561 transitions. [2021-06-05 03:58:19,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 03:58:19,844 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 11 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 03:58:19,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:58:19,873 INFO L225 Difference]: With dead ends: 25610 [2021-06-05 03:58:19,873 INFO L226 Difference]: Without dead ends: 25607 [2021-06-05 03:58:19,873 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 56.8ms TimeCoverageRelationStatistics Valid=64, Invalid=92, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:58:19,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25607 states. [2021-06-05 03:58:20,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25607 to 21817. [2021-06-05 03:58:20,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21817 states, 21816 states have (on average 2.657957462412908) internal successors, (57986), 21816 states have internal predecessors, (57986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:20,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21817 states to 21817 states and 57986 transitions. [2021-06-05 03:58:20,172 INFO L78 Accepts]: Start accepts. Automaton has 21817 states and 57986 transitions. Word has length 65 [2021-06-05 03:58:20,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:58:20,172 INFO L482 AbstractCegarLoop]: Abstraction has 21817 states and 57986 transitions. [2021-06-05 03:58:20,172 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 11 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:20,173 INFO L276 IsEmpty]: Start isEmpty. Operand 21817 states and 57986 transitions. [2021-06-05 03:58:20,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 03:58:20,186 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:58:20,186 INFO L521 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:58:20,387 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1239,577 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:20,387 INFO L430 AbstractCegarLoop]: === Iteration 586 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:58:20,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:58:20,387 INFO L82 PathProgramCache]: Analyzing trace with hash -174029225, now seen corresponding path program 356 times [2021-06-05 03:58:20,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:58:20,387 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013058226] [2021-06-05 03:58:20,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:58:20,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:20,457 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 85 proven. 138 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 03:58:20,457 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:58:20,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013058226] [2021-06-05 03:58:20,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013058226] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:20,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542201485] [2021-06-05 03:58:20,457 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 578 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 578 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:20,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:58:20,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:58:20,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 03:58:20,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:58:20,567 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 85 proven. 138 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 03:58:20,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [542201485] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:20,567 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:58:20,567 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-06-05 03:58:20,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690285925] [2021-06-05 03:58:20,567 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 03:58:20,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:58:20,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 03:58:20,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:58:20,567 INFO L87 Difference]: Start difference. First operand 21817 states and 57986 transitions. Second operand has 13 states, 13 states have (on average 4.769230769230769) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:20,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:58:20,822 INFO L93 Difference]: Finished difference Result 25614 states and 64489 transitions. [2021-06-05 03:58:20,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 03:58:20,823 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.769230769230769) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 03:58:20,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:58:20,851 INFO L225 Difference]: With dead ends: 25614 [2021-06-05 03:58:20,851 INFO L226 Difference]: Without dead ends: 25596 [2021-06-05 03:58:20,851 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 77.7ms TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:58:20,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25596 states. [2021-06-05 03:58:21,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25596 to 21817. [2021-06-05 03:58:21,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21817 states, 21816 states have (on average 2.6563989732306563) internal successors, (57952), 21816 states have internal predecessors, (57952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:21,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21817 states to 21817 states and 57952 transitions. [2021-06-05 03:58:21,185 INFO L78 Accepts]: Start accepts. Automaton has 21817 states and 57952 transitions. Word has length 65 [2021-06-05 03:58:21,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:58:21,185 INFO L482 AbstractCegarLoop]: Abstraction has 21817 states and 57952 transitions. [2021-06-05 03:58:21,185 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.769230769230769) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:21,185 INFO L276 IsEmpty]: Start isEmpty. Operand 21817 states and 57952 transitions. [2021-06-05 03:58:21,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 03:58:21,199 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:58:21,199 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:58:21,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1241,578 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:21,400 INFO L430 AbstractCegarLoop]: === Iteration 587 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:58:21,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:58:21,400 INFO L82 PathProgramCache]: Analyzing trace with hash -1622029238, now seen corresponding path program 357 times [2021-06-05 03:58:21,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:58:21,400 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204200311] [2021-06-05 03:58:21,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:58:21,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:21,493 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 22 proven. 201 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:58:21,493 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:58:21,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204200311] [2021-06-05 03:58:21,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204200311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:21,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137531070] [2021-06-05 03:58:21,493 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 579 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 579 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:21,524 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-06-05 03:58:21,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:58:21,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 03:58:21,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:58:21,619 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 17 proven. 206 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:58:21,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137531070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:21,620 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:58:21,620 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 03:58:21,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310162112] [2021-06-05 03:58:21,620 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 03:58:21,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:58:21,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 03:58:21,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:58:21,620 INFO L87 Difference]: Start difference. First operand 21817 states and 57952 transitions. Second operand has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 12 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:22,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:58:22,405 INFO L93 Difference]: Finished difference Result 23463 states and 60807 transitions. [2021-06-05 03:58:22,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 03:58:22,406 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 12 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 03:58:22,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:58:22,434 INFO L225 Difference]: With dead ends: 23463 [2021-06-05 03:58:22,434 INFO L226 Difference]: Without dead ends: 23407 [2021-06-05 03:58:22,434 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 161.5ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:58:22,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23407 states. [2021-06-05 03:58:22,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23407 to 21785. [2021-06-05 03:58:22,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21785 states, 21784 states have (on average 2.6542875504957766) internal successors, (57821), 21784 states have internal predecessors, (57821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:22,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21785 states to 21785 states and 57821 transitions. [2021-06-05 03:58:22,727 INFO L78 Accepts]: Start accepts. Automaton has 21785 states and 57821 transitions. Word has length 65 [2021-06-05 03:58:22,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:58:22,727 INFO L482 AbstractCegarLoop]: Abstraction has 21785 states and 57821 transitions. [2021-06-05 03:58:22,727 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 12 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:22,727 INFO L276 IsEmpty]: Start isEmpty. Operand 21785 states and 57821 transitions. [2021-06-05 03:58:22,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 03:58:22,741 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:58:22,741 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:58:22,942 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 579 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1244 [2021-06-05 03:58:22,942 INFO L430 AbstractCegarLoop]: === Iteration 588 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:58:22,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:58:22,942 INFO L82 PathProgramCache]: Analyzing trace with hash 2059401878, now seen corresponding path program 358 times [2021-06-05 03:58:22,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:58:22,942 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171629254] [2021-06-05 03:58:22,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:58:22,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:23,040 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 19 proven. 202 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 03:58:23,040 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:58:23,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171629254] [2021-06-05 03:58:23,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171629254] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:23,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136018245] [2021-06-05 03:58:23,041 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 580 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 580 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:23,067 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:58:23,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:58:23,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 03:58:23,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:58:23,153 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 203 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 03:58:23,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136018245] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:23,154 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:58:23,154 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 03:58:23,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231974749] [2021-06-05 03:58:23,154 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 03:58:23,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:58:23,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 03:58:23,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:58:23,154 INFO L87 Difference]: Start difference. First operand 21785 states and 57821 transitions. Second operand has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:23,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:58:23,776 INFO L93 Difference]: Finished difference Result 24092 states and 62187 transitions. [2021-06-05 03:58:23,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 03:58:23,777 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 03:58:23,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:58:23,802 INFO L225 Difference]: With dead ends: 24092 [2021-06-05 03:58:23,803 INFO L226 Difference]: Without dead ends: 24080 [2021-06-05 03:58:23,803 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 158.9ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:58:23,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24080 states. [2021-06-05 03:58:24,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24080 to 21828. [2021-06-05 03:58:24,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21828 states, 21827 states have (on average 2.6531818390067348) internal successors, (57911), 21827 states have internal predecessors, (57911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:24,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21828 states to 21828 states and 57911 transitions. [2021-06-05 03:58:24,098 INFO L78 Accepts]: Start accepts. Automaton has 21828 states and 57911 transitions. Word has length 65 [2021-06-05 03:58:24,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:58:24,099 INFO L482 AbstractCegarLoop]: Abstraction has 21828 states and 57911 transitions. [2021-06-05 03:58:24,099 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:24,099 INFO L276 IsEmpty]: Start isEmpty. Operand 21828 states and 57911 transitions. [2021-06-05 03:58:24,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 03:58:24,113 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:58:24,113 INFO L521 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:58:24,313 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 580 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1245 [2021-06-05 03:58:24,313 INFO L430 AbstractCegarLoop]: === Iteration 589 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:58:24,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:58:24,313 INFO L82 PathProgramCache]: Analyzing trace with hash 1902102391, now seen corresponding path program 172 times [2021-06-05 03:58:24,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:58:24,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637673347] [2021-06-05 03:58:24,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:58:24,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:24,385 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 130 proven. 96 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:58:24,385 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:58:24,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637673347] [2021-06-05 03:58:24,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637673347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:24,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413691687] [2021-06-05 03:58:24,385 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 581 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 581 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:24,502 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:58:24,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:58:24,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 03:58:24,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:58:24,591 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 132 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:24,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413691687] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:24,592 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:58:24,592 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2021-06-05 03:58:24,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116815104] [2021-06-05 03:58:24,592 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:58:24,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:58:24,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:58:24,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:58:24,592 INFO L87 Difference]: Start difference. First operand 21828 states and 57911 transitions. Second operand has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:24,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:58:24,843 INFO L93 Difference]: Finished difference Result 28795 states and 71587 transitions. [2021-06-05 03:58:24,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 03:58:24,843 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 03:58:24,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:58:24,876 INFO L225 Difference]: With dead ends: 28795 [2021-06-05 03:58:24,876 INFO L226 Difference]: Without dead ends: 28765 [2021-06-05 03:58:24,876 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 86.0ms TimeCoverageRelationStatistics Valid=104, Invalid=168, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:58:24,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28765 states. [2021-06-05 03:58:25,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28765 to 21897. [2021-06-05 03:58:25,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21897 states, 21896 states have (on average 2.6523565948118377) internal successors, (58076), 21896 states have internal predecessors, (58076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:25,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21897 states to 21897 states and 58076 transitions. [2021-06-05 03:58:25,207 INFO L78 Accepts]: Start accepts. Automaton has 21897 states and 58076 transitions. Word has length 65 [2021-06-05 03:58:25,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:58:25,207 INFO L482 AbstractCegarLoop]: Abstraction has 21897 states and 58076 transitions. [2021-06-05 03:58:25,207 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:25,207 INFO L276 IsEmpty]: Start isEmpty. Operand 21897 states and 58076 transitions. [2021-06-05 03:58:25,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 03:58:25,222 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:58:25,222 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:58:25,423 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1246,581 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:25,423 INFO L430 AbstractCegarLoop]: === Iteration 590 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:58:25,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:58:25,423 INFO L82 PathProgramCache]: Analyzing trace with hash -93648084, now seen corresponding path program 359 times [2021-06-05 03:58:25,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:58:25,423 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637839995] [2021-06-05 03:58:25,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:58:25,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:25,519 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 19 proven. 204 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:58:25,519 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:58:25,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637839995] [2021-06-05 03:58:25,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637839995] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:25,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022757736] [2021-06-05 03:58:25,520 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 582 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 582 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:25,552 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-06-05 03:58:25,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:58:25,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 03:58:25,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:58:25,637 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 205 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:58:25,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022757736] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:25,637 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:58:25,637 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 03:58:25,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074907876] [2021-06-05 03:58:25,637 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:58:25,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:58:25,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:58:25,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:58:25,637 INFO L87 Difference]: Start difference. First operand 21897 states and 58076 transitions. Second operand has 14 states, 14 states have (on average 4.642857142857143) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:26,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:58:26,377 INFO L93 Difference]: Finished difference Result 25821 states and 65999 transitions. [2021-06-05 03:58:26,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 03:58:26,379 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.642857142857143) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 03:58:26,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:58:26,411 INFO L225 Difference]: With dead ends: 25821 [2021-06-05 03:58:26,411 INFO L226 Difference]: Without dead ends: 25779 [2021-06-05 03:58:26,411 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 70 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 203.7ms TimeCoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2021-06-05 03:58:26,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25779 states. [2021-06-05 03:58:26,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25779 to 21985. [2021-06-05 03:58:26,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21985 states, 21984 states have (on average 2.652701965065502) internal successors, (58317), 21984 states have internal predecessors, (58317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:26,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21985 states to 21985 states and 58317 transitions. [2021-06-05 03:58:26,737 INFO L78 Accepts]: Start accepts. Automaton has 21985 states and 58317 transitions. Word has length 65 [2021-06-05 03:58:26,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:58:26,737 INFO L482 AbstractCegarLoop]: Abstraction has 21985 states and 58317 transitions. [2021-06-05 03:58:26,737 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.642857142857143) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:26,738 INFO L276 IsEmpty]: Start isEmpty. Operand 21985 states and 58317 transitions. [2021-06-05 03:58:26,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 03:58:26,752 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:58:26,752 INFO L521 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:58:26,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 582 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1249 [2021-06-05 03:58:26,952 INFO L430 AbstractCegarLoop]: === Iteration 591 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:58:26,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:58:26,953 INFO L82 PathProgramCache]: Analyzing trace with hash 1438911025, now seen corresponding path program 360 times [2021-06-05 03:58:26,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:58:26,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902498346] [2021-06-05 03:58:26,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:58:26,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:27,033 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 83 proven. 143 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:58:27,034 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:58:27,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902498346] [2021-06-05 03:58:27,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902498346] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:27,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564942764] [2021-06-05 03:58:27,034 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 583 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 583 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:27,065 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-05 03:58:27,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:58:27,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 03:58:27,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:58:27,150 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 83 proven. 143 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:58:27,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564942764] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:27,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:58:27,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-06-05 03:58:27,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299815610] [2021-06-05 03:58:27,151 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:58:27,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:58:27,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:58:27,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:58:27,151 INFO L87 Difference]: Start difference. First operand 21985 states and 58317 transitions. Second operand has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 13 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:27,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:58:27,414 INFO L93 Difference]: Finished difference Result 25751 states and 64746 transitions. [2021-06-05 03:58:27,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 03:58:27,414 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 13 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 03:58:27,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:58:27,443 INFO L225 Difference]: With dead ends: 25751 [2021-06-05 03:58:27,443 INFO L226 Difference]: Without dead ends: 25727 [2021-06-05 03:58:27,443 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 89.4ms TimeCoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:58:27,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25727 states. [2021-06-05 03:58:27,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25727 to 21464. [2021-06-05 03:58:27,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21464 states, 21463 states have (on average 2.6467409029492615) internal successors, (56807), 21463 states have internal predecessors, (56807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:27,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21464 states to 21464 states and 56807 transitions. [2021-06-05 03:58:27,788 INFO L78 Accepts]: Start accepts. Automaton has 21464 states and 56807 transitions. Word has length 65 [2021-06-05 03:58:27,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:58:27,788 INFO L482 AbstractCegarLoop]: Abstraction has 21464 states and 56807 transitions. [2021-06-05 03:58:27,789 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 13 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:27,789 INFO L276 IsEmpty]: Start isEmpty. Operand 21464 states and 56807 transitions. [2021-06-05 03:58:27,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 03:58:27,803 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:58:27,803 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:58:28,003 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 583 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1250 [2021-06-05 03:58:28,003 INFO L430 AbstractCegarLoop]: === Iteration 592 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:58:28,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:58:28,004 INFO L82 PathProgramCache]: Analyzing trace with hash 61188450, now seen corresponding path program 361 times [2021-06-05 03:58:28,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:58:28,004 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590294988] [2021-06-05 03:58:28,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:58:28,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:28,111 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 207 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:58:28,111 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:58:28,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590294988] [2021-06-05 03:58:28,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590294988] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:28,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194604454] [2021-06-05 03:58:28,111 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 584 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 584 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:28,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:28,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 03:58:28,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:58:28,225 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 207 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:58:28,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194604454] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:28,225 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:58:28,225 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 03:58:28,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774092620] [2021-06-05 03:58:28,225 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 03:58:28,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:58:28,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 03:58:28,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:58:28,225 INFO L87 Difference]: Start difference. First operand 21464 states and 56807 transitions. Second operand has 15 states, 15 states have (on average 4.4) internal successors, (66), 14 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:29,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:58:29,038 INFO L93 Difference]: Finished difference Result 26000 states and 65957 transitions. [2021-06-05 03:58:29,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 03:58:29,039 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.4) internal successors, (66), 14 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 03:58:29,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:58:29,069 INFO L225 Difference]: With dead ends: 26000 [2021-06-05 03:58:29,069 INFO L226 Difference]: Without dead ends: 25946 [2021-06-05 03:58:29,069 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 69 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 221.7ms TimeCoverageRelationStatistics Valid=94, Invalid=662, Unknown=0, NotChecked=0, Total=756 [2021-06-05 03:58:29,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25946 states. [2021-06-05 03:58:29,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25946 to 21403. [2021-06-05 03:58:29,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21403 states, 21402 states have (on average 2.6448462760489675) internal successors, (56605), 21402 states have internal predecessors, (56605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:29,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21403 states to 21403 states and 56605 transitions. [2021-06-05 03:58:29,371 INFO L78 Accepts]: Start accepts. Automaton has 21403 states and 56605 transitions. Word has length 65 [2021-06-05 03:58:29,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:58:29,371 INFO L482 AbstractCegarLoop]: Abstraction has 21403 states and 56605 transitions. [2021-06-05 03:58:29,371 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.4) internal successors, (66), 14 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:29,371 INFO L276 IsEmpty]: Start isEmpty. Operand 21403 states and 56605 transitions. [2021-06-05 03:58:29,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 03:58:29,385 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:58:29,386 INFO L521 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:58:29,586 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 584 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1254 [2021-06-05 03:58:29,586 INFO L430 AbstractCegarLoop]: === Iteration 593 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:58:29,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:58:29,586 INFO L82 PathProgramCache]: Analyzing trace with hash -798753477, now seen corresponding path program 173 times [2021-06-05 03:58:29,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:58:29,586 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597601913] [2021-06-05 03:58:29,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:58:29,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:29,655 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 154 proven. 72 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:58:29,655 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:58:29,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597601913] [2021-06-05 03:58:29,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597601913] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:29,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229773544] [2021-06-05 03:58:29,655 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 585 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 585 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:29,687 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-06-05 03:58:29,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:58:29,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 03:58:29,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:58:29,837 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 156 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:29,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229773544] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:29,838 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:58:29,838 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19] total 21 [2021-06-05 03:58:29,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556251422] [2021-06-05 03:58:29,838 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 03:58:29,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:58:29,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 03:58:29,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=290, Unknown=0, NotChecked=0, Total=462 [2021-06-05 03:58:29,838 INFO L87 Difference]: Start difference. First operand 21403 states and 56605 transitions. Second operand has 22 states, 22 states have (on average 3.9545454545454546) internal successors, (87), 21 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:30,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:58:30,261 INFO L93 Difference]: Finished difference Result 34849 states and 85268 transitions. [2021-06-05 03:58:30,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 03:58:30,261 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.9545454545454546) internal successors, (87), 21 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 03:58:30,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:58:30,300 INFO L225 Difference]: With dead ends: 34849 [2021-06-05 03:58:30,300 INFO L226 Difference]: Without dead ends: 34849 [2021-06-05 03:58:30,301 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 196.2ms TimeCoverageRelationStatistics Valid=303, Invalid=453, Unknown=0, NotChecked=0, Total=756 [2021-06-05 03:58:30,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34849 states. [2021-06-05 03:58:30,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34849 to 21691. [2021-06-05 03:58:30,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21691 states, 21690 states have (on average 2.6503457814661133) internal successors, (57486), 21690 states have internal predecessors, (57486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:30,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21691 states to 21691 states and 57486 transitions. [2021-06-05 03:58:30,654 INFO L78 Accepts]: Start accepts. Automaton has 21691 states and 57486 transitions. Word has length 65 [2021-06-05 03:58:30,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:58:30,654 INFO L482 AbstractCegarLoop]: Abstraction has 21691 states and 57486 transitions. [2021-06-05 03:58:30,654 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.9545454545454546) internal successors, (87), 21 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:30,654 INFO L276 IsEmpty]: Start isEmpty. Operand 21691 states and 57486 transitions. [2021-06-05 03:58:30,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 03:58:30,669 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:58:30,669 INFO L521 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:58:30,869 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 585 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1255 [2021-06-05 03:58:30,869 INFO L430 AbstractCegarLoop]: === Iteration 594 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:58:30,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:58:30,869 INFO L82 PathProgramCache]: Analyzing trace with hash 1858641363, now seen corresponding path program 174 times [2021-06-05 03:58:30,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:58:30,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969336472] [2021-06-05 03:58:30,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:58:30,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:30,948 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 149 proven. 77 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:58:30,948 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:58:30,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969336472] [2021-06-05 03:58:30,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969336472] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:30,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627587388] [2021-06-05 03:58:30,948 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 586 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 586 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:30,980 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-06-05 03:58:30,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:58:30,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 03:58:30,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:58:31,073 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 150 proven. 77 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:58:31,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627587388] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:31,073 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:58:31,074 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 14 [2021-06-05 03:58:31,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883331000] [2021-06-05 03:58:31,074 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 03:58:31,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:58:31,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 03:58:31,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:58:31,074 INFO L87 Difference]: Start difference. First operand 21691 states and 57486 transitions. Second operand has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:31,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:58:31,424 INFO L93 Difference]: Finished difference Result 33025 states and 80919 transitions. [2021-06-05 03:58:31,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 03:58:31,424 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 03:58:31,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:58:31,464 INFO L225 Difference]: With dead ends: 33025 [2021-06-05 03:58:31,464 INFO L226 Difference]: Without dead ends: 33025 [2021-06-05 03:58:31,464 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 110.7ms TimeCoverageRelationStatistics Valid=154, Invalid=226, Unknown=0, NotChecked=0, Total=380 [2021-06-05 03:58:31,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33025 states. [2021-06-05 03:58:31,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33025 to 21674. [2021-06-05 03:58:31,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21674 states, 21673 states have (on average 2.648964148941079) internal successors, (57411), 21673 states have internal predecessors, (57411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:31,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21674 states to 21674 states and 57411 transitions. [2021-06-05 03:58:31,802 INFO L78 Accepts]: Start accepts. Automaton has 21674 states and 57411 transitions. Word has length 65 [2021-06-05 03:58:31,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:58:31,802 INFO L482 AbstractCegarLoop]: Abstraction has 21674 states and 57411 transitions. [2021-06-05 03:58:31,802 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:31,802 INFO L276 IsEmpty]: Start isEmpty. Operand 21674 states and 57411 transitions. [2021-06-05 03:58:31,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 03:58:31,816 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:58:31,816 INFO L521 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:58:32,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 586 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1256 [2021-06-05 03:58:32,016 INFO L430 AbstractCegarLoop]: === Iteration 595 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:58:32,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:58:32,017 INFO L82 PathProgramCache]: Analyzing trace with hash 168646199, now seen corresponding path program 175 times [2021-06-05 03:58:32,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:58:32,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322134220] [2021-06-05 03:58:32,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:58:32,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:32,106 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 130 proven. 97 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:58:32,106 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:58:32,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322134220] [2021-06-05 03:58:32,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322134220] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:32,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882749309] [2021-06-05 03:58:32,106 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 587 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 587 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:32,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:32,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 03:58:32,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:58:32,230 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 131 proven. 97 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:32,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882749309] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:32,231 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:58:32,231 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 15 [2021-06-05 03:58:32,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100119109] [2021-06-05 03:58:32,231 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:58:32,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:58:32,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:58:32,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:58:32,231 INFO L87 Difference]: Start difference. First operand 21674 states and 57411 transitions. Second operand has 16 states, 16 states have (on average 4.3125) internal successors, (69), 15 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:32,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:58:32,550 INFO L93 Difference]: Finished difference Result 29232 states and 72460 transitions. [2021-06-05 03:58:32,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 03:58:32,551 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.3125) internal successors, (69), 15 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 03:58:32,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:58:32,585 INFO L225 Difference]: With dead ends: 29232 [2021-06-05 03:58:32,585 INFO L226 Difference]: Without dead ends: 29232 [2021-06-05 03:58:32,585 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 124.3ms TimeCoverageRelationStatistics Valid=161, Invalid=259, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:58:32,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29232 states. [2021-06-05 03:58:32,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29232 to 21133. [2021-06-05 03:58:32,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21133 states, 21132 states have (on average 2.6413496119629) internal successors, (55817), 21132 states have internal predecessors, (55817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:32,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21133 states to 21133 states and 55817 transitions. [2021-06-05 03:58:32,914 INFO L78 Accepts]: Start accepts. Automaton has 21133 states and 55817 transitions. Word has length 65 [2021-06-05 03:58:32,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:58:32,914 INFO L482 AbstractCegarLoop]: Abstraction has 21133 states and 55817 transitions. [2021-06-05 03:58:32,914 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.3125) internal successors, (69), 15 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:32,914 INFO L276 IsEmpty]: Start isEmpty. Operand 21133 states and 55817 transitions. [2021-06-05 03:58:32,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 03:58:32,929 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:58:32,929 INFO L521 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:58:33,129 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 587 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1257 [2021-06-05 03:58:33,130 INFO L430 AbstractCegarLoop]: === Iteration 596 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:58:33,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:58:33,130 INFO L82 PathProgramCache]: Analyzing trace with hash 447791127, now seen corresponding path program 362 times [2021-06-05 03:58:33,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:58:33,130 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466834329] [2021-06-05 03:58:33,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:58:33,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:33,218 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 88 proven. 139 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:58:33,218 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:58:33,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466834329] [2021-06-05 03:58:33,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466834329] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:33,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850586729] [2021-06-05 03:58:33,218 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 588 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 588 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:33,246 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:58:33,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:58:33,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 03:58:33,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:58:33,332 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 88 proven. 139 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:58:33,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850586729] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:33,332 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:58:33,332 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-06-05 03:58:33,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702584928] [2021-06-05 03:58:33,332 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 03:58:33,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:58:33,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 03:58:33,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:58:33,333 INFO L87 Difference]: Start difference. First operand 21133 states and 55817 transitions. Second operand has 15 states, 15 states have (on average 4.266666666666667) internal successors, (64), 14 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:33,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:58:33,553 INFO L93 Difference]: Finished difference Result 24649 states and 61830 transitions. [2021-06-05 03:58:33,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 03:58:33,553 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.266666666666667) internal successors, (64), 14 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 03:58:33,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:58:33,581 INFO L225 Difference]: With dead ends: 24649 [2021-06-05 03:58:33,581 INFO L226 Difference]: Without dead ends: 24622 [2021-06-05 03:58:33,581 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 105.2ms TimeCoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:58:33,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24622 states. [2021-06-05 03:58:33,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24622 to 21133. [2021-06-05 03:58:33,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21133 states, 21132 states have (on average 2.640781752791974) internal successors, (55805), 21132 states have internal predecessors, (55805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:33,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21133 states to 21133 states and 55805 transitions. [2021-06-05 03:58:33,871 INFO L78 Accepts]: Start accepts. Automaton has 21133 states and 55805 transitions. Word has length 65 [2021-06-05 03:58:33,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:58:33,871 INFO L482 AbstractCegarLoop]: Abstraction has 21133 states and 55805 transitions. [2021-06-05 03:58:33,871 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.266666666666667) internal successors, (64), 14 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:33,871 INFO L276 IsEmpty]: Start isEmpty. Operand 21133 states and 55805 transitions. [2021-06-05 03:58:33,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 03:58:33,886 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:58:33,886 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:58:34,086 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1258,588 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:34,086 INFO L430 AbstractCegarLoop]: === Iteration 597 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:58:34,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:58:34,086 INFO L82 PathProgramCache]: Analyzing trace with hash -275453914, now seen corresponding path program 176 times [2021-06-05 03:58:34,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:58:34,086 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755771843] [2021-06-05 03:58:34,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:58:34,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:34,185 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 10 proven. 213 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:58:34,185 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:58:34,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755771843] [2021-06-05 03:58:34,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755771843] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:34,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306762694] [2021-06-05 03:58:34,185 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 589 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 589 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:34,213 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:58:34,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:58:34,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 03:58:34,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:58:34,300 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 9 proven. 214 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:58:34,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306762694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:34,300 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:58:34,300 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 03:58:34,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168980704] [2021-06-05 03:58:34,300 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 03:58:34,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:58:34,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 03:58:34,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:58:34,301 INFO L87 Difference]: Start difference. First operand 21133 states and 55805 transitions. Second operand has 13 states, 13 states have (on average 5.0) internal successors, (65), 12 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:34,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:58:34,927 INFO L93 Difference]: Finished difference Result 23655 states and 60711 transitions. [2021-06-05 03:58:34,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 03:58:34,927 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.0) internal successors, (65), 12 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 03:58:34,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:58:34,953 INFO L225 Difference]: With dead ends: 23655 [2021-06-05 03:58:34,953 INFO L226 Difference]: Without dead ends: 23612 [2021-06-05 03:58:34,953 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 159.4ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:58:34,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23612 states. [2021-06-05 03:58:35,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23612 to 21337. [2021-06-05 03:58:35,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21337 states, 21336 states have (on average 2.6395763029621295) internal successors, (56318), 21336 states have internal predecessors, (56318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:35,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21337 states to 21337 states and 56318 transitions. [2021-06-05 03:58:35,241 INFO L78 Accepts]: Start accepts. Automaton has 21337 states and 56318 transitions. Word has length 65 [2021-06-05 03:58:35,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:58:35,241 INFO L482 AbstractCegarLoop]: Abstraction has 21337 states and 56318 transitions. [2021-06-05 03:58:35,241 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.0) internal successors, (65), 12 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:35,241 INFO L276 IsEmpty]: Start isEmpty. Operand 21337 states and 56318 transitions. [2021-06-05 03:58:35,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 03:58:35,255 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:58:35,255 INFO L521 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:58:35,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1263,589 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:35,456 INFO L430 AbstractCegarLoop]: === Iteration 598 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:58:35,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:58:35,456 INFO L82 PathProgramCache]: Analyzing trace with hash -1829150771, now seen corresponding path program 363 times [2021-06-05 03:58:35,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:58:35,456 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593949569] [2021-06-05 03:58:35,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:58:35,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:35,517 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 79 proven. 144 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 03:58:35,518 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:58:35,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593949569] [2021-06-05 03:58:35,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593949569] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:35,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818025639] [2021-06-05 03:58:35,518 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 590 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 590 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:35,550 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-06-05 03:58:35,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:58:35,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 03:58:35,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:58:35,633 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 79 proven. 144 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 03:58:35,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818025639] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:35,633 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:58:35,633 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 03:58:35,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565483082] [2021-06-05 03:58:35,633 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 03:58:35,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:58:35,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 03:58:35,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:58:35,634 INFO L87 Difference]: Start difference. First operand 21337 states and 56318 transitions. Second operand has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 11 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:35,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:58:35,819 INFO L93 Difference]: Finished difference Result 25552 states and 63612 transitions. [2021-06-05 03:58:35,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 03:58:35,820 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 11 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 03:58:35,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:58:35,850 INFO L225 Difference]: With dead ends: 25552 [2021-06-05 03:58:35,850 INFO L226 Difference]: Without dead ends: 25549 [2021-06-05 03:58:35,850 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 55.0ms TimeCoverageRelationStatistics Valid=65, Invalid=91, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:58:35,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25549 states. [2021-06-05 03:58:36,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25549 to 21311. [2021-06-05 03:58:36,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21311 states, 21310 states have (on average 2.638198029094322) internal successors, (56220), 21310 states have internal predecessors, (56220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:36,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21311 states to 21311 states and 56220 transitions. [2021-06-05 03:58:36,165 INFO L78 Accepts]: Start accepts. Automaton has 21311 states and 56220 transitions. Word has length 65 [2021-06-05 03:58:36,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:58:36,165 INFO L482 AbstractCegarLoop]: Abstraction has 21311 states and 56220 transitions. [2021-06-05 03:58:36,165 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 11 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:36,165 INFO L276 IsEmpty]: Start isEmpty. Operand 21311 states and 56220 transitions. [2021-06-05 03:58:36,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 03:58:36,181 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:58:36,181 INFO L521 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:58:36,381 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 590 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1264 [2021-06-05 03:58:36,381 INFO L430 AbstractCegarLoop]: === Iteration 599 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:58:36,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:58:36,381 INFO L82 PathProgramCache]: Analyzing trace with hash -1622088205, now seen corresponding path program 364 times [2021-06-05 03:58:36,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:58:36,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529022967] [2021-06-05 03:58:36,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:58:36,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:36,450 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 74 proven. 149 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 03:58:36,450 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:58:36,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529022967] [2021-06-05 03:58:36,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529022967] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:36,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743762763] [2021-06-05 03:58:36,450 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 591 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 591 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:36,477 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:58:36,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:58:36,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 03:58:36,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:58:36,561 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 74 proven. 149 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 03:58:36,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743762763] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:36,561 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:58:36,561 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-06-05 03:58:36,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115558359] [2021-06-05 03:58:36,561 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 03:58:36,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:58:36,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 03:58:36,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:58:36,562 INFO L87 Difference]: Start difference. First operand 21311 states and 56220 transitions. Second operand has 13 states, 13 states have (on average 4.769230769230769) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:36,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:58:36,826 INFO L93 Difference]: Finished difference Result 25562 states and 63563 transitions. [2021-06-05 03:58:36,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 03:58:36,827 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.769230769230769) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 03:58:36,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:58:36,856 INFO L225 Difference]: With dead ends: 25562 [2021-06-05 03:58:36,856 INFO L226 Difference]: Without dead ends: 25544 [2021-06-05 03:58:36,856 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 77.0ms TimeCoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:58:36,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25544 states. [2021-06-05 03:58:37,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25544 to 21311. [2021-06-05 03:58:37,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21311 states, 21310 states have (on average 2.6368840919755985) internal successors, (56192), 21310 states have internal predecessors, (56192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:37,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21311 states to 21311 states and 56192 transitions. [2021-06-05 03:58:37,150 INFO L78 Accepts]: Start accepts. Automaton has 21311 states and 56192 transitions. Word has length 65 [2021-06-05 03:58:37,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:58:37,150 INFO L482 AbstractCegarLoop]: Abstraction has 21311 states and 56192 transitions. [2021-06-05 03:58:37,150 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.769230769230769) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:37,150 INFO L276 IsEmpty]: Start isEmpty. Operand 21311 states and 56192 transitions. [2021-06-05 03:58:37,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 03:58:37,164 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:58:37,164 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:58:37,364 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 591 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1266 [2021-06-05 03:58:37,364 INFO L430 AbstractCegarLoop]: === Iteration 600 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:58:37,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:58:37,365 INFO L82 PathProgramCache]: Analyzing trace with hash 1224879078, now seen corresponding path program 365 times [2021-06-05 03:58:37,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:58:37,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363320259] [2021-06-05 03:58:37,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:58:37,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:37,456 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 22 proven. 201 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:58:37,456 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:58:37,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363320259] [2021-06-05 03:58:37,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363320259] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:37,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510091296] [2021-06-05 03:58:37,456 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 592 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 592 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:37,488 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-06-05 03:58:37,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:58:37,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 03:58:37,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:58:37,584 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 17 proven. 206 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:58:37,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510091296] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:37,585 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:58:37,585 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 03:58:37,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406810521] [2021-06-05 03:58:37,585 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 03:58:37,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:58:37,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 03:58:37,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:58:37,585 INFO L87 Difference]: Start difference. First operand 21311 states and 56192 transitions. Second operand has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 12 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:38,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:58:38,407 INFO L93 Difference]: Finished difference Result 22721 states and 58670 transitions. [2021-06-05 03:58:38,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 03:58:38,407 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 12 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 03:58:38,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:58:38,432 INFO L225 Difference]: With dead ends: 22721 [2021-06-05 03:58:38,432 INFO L226 Difference]: Without dead ends: 22647 [2021-06-05 03:58:38,432 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 159.9ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:58:38,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22647 states. [2021-06-05 03:58:38,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22647 to 21285. [2021-06-05 03:58:38,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21285 states, 21284 states have (on average 2.6344202217628268) internal successors, (56071), 21284 states have internal predecessors, (56071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:38,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21285 states to 21285 states and 56071 transitions. [2021-06-05 03:58:38,706 INFO L78 Accepts]: Start accepts. Automaton has 21285 states and 56071 transitions. Word has length 65 [2021-06-05 03:58:38,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:58:38,707 INFO L482 AbstractCegarLoop]: Abstraction has 21285 states and 56071 transitions. [2021-06-05 03:58:38,707 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 12 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:38,707 INFO L276 IsEmpty]: Start isEmpty. Operand 21285 states and 56071 transitions. [2021-06-05 03:58:38,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 03:58:38,721 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:58:38,721 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:58:38,921 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 592 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1269 [2021-06-05 03:58:38,922 INFO L430 AbstractCegarLoop]: === Iteration 601 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:58:38,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:58:38,922 INFO L82 PathProgramCache]: Analyzing trace with hash 611342898, now seen corresponding path program 366 times [2021-06-05 03:58:38,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:58:38,922 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866486993] [2021-06-05 03:58:38,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:58:38,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:39,019 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 19 proven. 202 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 03:58:39,019 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:58:39,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866486993] [2021-06-05 03:58:39,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866486993] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:39,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153293120] [2021-06-05 03:58:39,019 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 593 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 593 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:39,050 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-06-05 03:58:39,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:58:39,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 03:58:39,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:58:39,135 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 203 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 03:58:39,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153293120] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:39,135 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:58:39,135 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 03:58:39,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502437692] [2021-06-05 03:58:39,135 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 03:58:39,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:58:39,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 03:58:39,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:58:39,135 INFO L87 Difference]: Start difference. First operand 21285 states and 56071 transitions. Second operand has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:39,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:58:39,725 INFO L93 Difference]: Finished difference Result 23377 states and 60094 transitions. [2021-06-05 03:58:39,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 03:58:39,726 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 03:58:39,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:58:39,753 INFO L225 Difference]: With dead ends: 23377 [2021-06-05 03:58:39,753 INFO L226 Difference]: Without dead ends: 23365 [2021-06-05 03:58:39,753 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 156.0ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:58:39,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23365 states. [2021-06-05 03:58:39,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23365 to 21337. [2021-06-05 03:58:40,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21337 states, 21336 states have (on average 2.6334364454443193) internal successors, (56187), 21336 states have internal predecessors, (56187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:40,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21337 states to 21337 states and 56187 transitions. [2021-06-05 03:58:40,034 INFO L78 Accepts]: Start accepts. Automaton has 21337 states and 56187 transitions. Word has length 65 [2021-06-05 03:58:40,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:58:40,035 INFO L482 AbstractCegarLoop]: Abstraction has 21337 states and 56187 transitions. [2021-06-05 03:58:40,035 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:40,035 INFO L276 IsEmpty]: Start isEmpty. Operand 21337 states and 56187 transitions. [2021-06-05 03:58:40,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 03:58:40,049 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:58:40,049 INFO L521 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:58:40,249 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1270,593 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:40,249 INFO L430 AbstractCegarLoop]: === Iteration 602 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:58:40,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:58:40,250 INFO L82 PathProgramCache]: Analyzing trace with hash 454043411, now seen corresponding path program 177 times [2021-06-05 03:58:40,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:58:40,250 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935787110] [2021-06-05 03:58:40,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:58:40,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:40,318 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 143 proven. 83 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:58:40,318 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:58:40,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935787110] [2021-06-05 03:58:40,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935787110] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:40,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694139019] [2021-06-05 03:58:40,318 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 594 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 594 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:40,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-06-05 03:58:40,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:58:40,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 03:58:40,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:58:40,437 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 145 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:40,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694139019] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:40,438 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:58:40,438 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2021-06-05 03:58:40,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555937795] [2021-06-05 03:58:40,438 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:58:40,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:58:40,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:58:40,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:58:40,438 INFO L87 Difference]: Start difference. First operand 21337 states and 56187 transitions. Second operand has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:40,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:58:40,659 INFO L93 Difference]: Finished difference Result 27785 states and 69129 transitions. [2021-06-05 03:58:40,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 03:58:40,659 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 03:58:40,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:58:40,691 INFO L225 Difference]: With dead ends: 27785 [2021-06-05 03:58:40,691 INFO L226 Difference]: Without dead ends: 27755 [2021-06-05 03:58:40,691 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 81.5ms TimeCoverageRelationStatistics Valid=102, Invalid=170, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:58:40,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27755 states. [2021-06-05 03:58:40,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27755 to 21784. [2021-06-05 03:58:40,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21784 states, 21783 states have (on average 2.6391681586558327) internal successors, (57489), 21783 states have internal predecessors, (57489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:41,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21784 states to 21784 states and 57489 transitions. [2021-06-05 03:58:41,001 INFO L78 Accepts]: Start accepts. Automaton has 21784 states and 57489 transitions. Word has length 65 [2021-06-05 03:58:41,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:58:41,001 INFO L482 AbstractCegarLoop]: Abstraction has 21784 states and 57489 transitions. [2021-06-05 03:58:41,001 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:41,001 INFO L276 IsEmpty]: Start isEmpty. Operand 21784 states and 57489 transitions. [2021-06-05 03:58:41,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 03:58:41,105 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:58:41,105 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:58:41,305 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1271,594 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:41,305 INFO L430 AbstractCegarLoop]: === Iteration 603 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:58:41,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:58:41,305 INFO L82 PathProgramCache]: Analyzing trace with hash -1541707064, now seen corresponding path program 367 times [2021-06-05 03:58:41,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:58:41,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305464991] [2021-06-05 03:58:41,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:58:41,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:41,417 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 19 proven. 204 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:58:41,418 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:58:41,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305464991] [2021-06-05 03:58:41,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305464991] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:41,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455186192] [2021-06-05 03:58:41,418 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 595 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 595 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:41,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:41,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 03:58:41,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:58:41,542 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 205 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:58:41,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455186192] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:41,543 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:58:41,543 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 03:58:41,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92762720] [2021-06-05 03:58:41,543 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:58:41,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:58:41,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:58:41,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:58:41,543 INFO L87 Difference]: Start difference. First operand 21784 states and 57489 transitions. Second operand has 14 states, 14 states have (on average 4.642857142857143) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:42,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:58:42,330 INFO L93 Difference]: Finished difference Result 25899 states and 65956 transitions. [2021-06-05 03:58:42,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 03:58:42,330 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.642857142857143) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 03:58:42,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:58:42,360 INFO L225 Difference]: With dead ends: 25899 [2021-06-05 03:58:42,360 INFO L226 Difference]: Without dead ends: 25845 [2021-06-05 03:58:42,361 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 70 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 239.9ms TimeCoverageRelationStatistics Valid=99, Invalid=713, Unknown=0, NotChecked=0, Total=812 [2021-06-05 03:58:42,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25845 states. [2021-06-05 03:58:42,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25845 to 21962. [2021-06-05 03:58:42,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21962 states, 21961 states have (on average 2.6392240790492236) internal successors, (57960), 21961 states have internal predecessors, (57960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:42,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21962 states to 21962 states and 57960 transitions. [2021-06-05 03:58:42,666 INFO L78 Accepts]: Start accepts. Automaton has 21962 states and 57960 transitions. Word has length 65 [2021-06-05 03:58:42,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:58:42,666 INFO L482 AbstractCegarLoop]: Abstraction has 21962 states and 57960 transitions. [2021-06-05 03:58:42,666 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.642857142857143) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:42,666 INFO L276 IsEmpty]: Start isEmpty. Operand 21962 states and 57960 transitions. [2021-06-05 03:58:42,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 03:58:42,680 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:58:42,680 INFO L521 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:58:42,881 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1274,595 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:42,881 INFO L430 AbstractCegarLoop]: === Iteration 604 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:58:42,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:58:42,881 INFO L82 PathProgramCache]: Analyzing trace with hash -9147955, now seen corresponding path program 368 times [2021-06-05 03:58:42,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:58:42,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486456235] [2021-06-05 03:58:42,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:58:42,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:42,958 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 69 proven. 157 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:58:42,959 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:58:42,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486456235] [2021-06-05 03:58:42,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486456235] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:42,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939670761] [2021-06-05 03:58:42,959 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 596 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 596 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:42,985 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:58:42,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:58:42,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 03:58:42,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:58:43,071 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 69 proven. 157 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:58:43,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939670761] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:43,071 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:58:43,071 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-06-05 03:58:43,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097868695] [2021-06-05 03:58:43,071 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:58:43,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:58:43,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:58:43,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:58:43,071 INFO L87 Difference]: Start difference. First operand 21962 states and 57960 transitions. Second operand has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 13 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:43,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:58:43,293 INFO L93 Difference]: Finished difference Result 26218 states and 65296 transitions. [2021-06-05 03:58:43,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 03:58:43,294 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 13 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 03:58:43,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:58:43,322 INFO L225 Difference]: With dead ends: 26218 [2021-06-05 03:58:43,323 INFO L226 Difference]: Without dead ends: 26194 [2021-06-05 03:58:43,323 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 85.8ms TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:58:43,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26194 states. [2021-06-05 03:58:43,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26194 to 21962. [2021-06-05 03:58:43,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21962 states, 21961 states have (on average 2.63844997950913) internal successors, (57943), 21961 states have internal predecessors, (57943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:43,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21962 states to 21962 states and 57943 transitions. [2021-06-05 03:58:43,631 INFO L78 Accepts]: Start accepts. Automaton has 21962 states and 57943 transitions. Word has length 65 [2021-06-05 03:58:43,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:58:43,631 INFO L482 AbstractCegarLoop]: Abstraction has 21962 states and 57943 transitions. [2021-06-05 03:58:43,631 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 13 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:43,631 INFO L276 IsEmpty]: Start isEmpty. Operand 21962 states and 57943 transitions. [2021-06-05 03:58:43,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 03:58:43,646 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:58:43,646 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:58:43,846 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 596 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1275 [2021-06-05 03:58:43,846 INFO L430 AbstractCegarLoop]: === Iteration 605 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:58:43,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:58:43,847 INFO L82 PathProgramCache]: Analyzing trace with hash -1386870530, now seen corresponding path program 369 times [2021-06-05 03:58:43,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:58:43,847 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705419599] [2021-06-05 03:58:43,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:58:43,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:43,953 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 19 proven. 204 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:58:43,953 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:58:43,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705419599] [2021-06-05 03:58:43,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705419599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:43,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921380721] [2021-06-05 03:58:43,953 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 597 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 597 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:43,985 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-06-05 03:58:43,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:58:43,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 03:58:43,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:58:44,069 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 205 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:58:44,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921380721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:44,070 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:58:44,070 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 03:58:44,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764245366] [2021-06-05 03:58:44,070 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 03:58:44,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:58:44,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 03:58:44,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:58:44,070 INFO L87 Difference]: Start difference. First operand 21962 states and 57943 transitions. Second operand has 15 states, 15 states have (on average 4.333333333333333) internal successors, (65), 14 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:45,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:58:45,077 INFO L93 Difference]: Finished difference Result 29175 states and 73161 transitions. [2021-06-05 03:58:45,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 03:58:45,078 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.333333333333333) internal successors, (65), 14 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 03:58:45,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:58:45,105 INFO L225 Difference]: With dead ends: 29175 [2021-06-05 03:58:45,106 INFO L226 Difference]: Without dead ends: 29061 [2021-06-05 03:58:45,106 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 69 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 348.6ms TimeCoverageRelationStatistics Valid=189, Invalid=1451, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 03:58:45,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29061 states. [2021-06-05 03:58:45,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29061 to 22155. [2021-06-05 03:58:45,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22155 states, 22154 states have (on average 2.638665703710391) internal successors, (58457), 22154 states have internal predecessors, (58457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:45,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22155 states to 22155 states and 58457 transitions. [2021-06-05 03:58:45,411 INFO L78 Accepts]: Start accepts. Automaton has 22155 states and 58457 transitions. Word has length 65 [2021-06-05 03:58:45,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:58:45,411 INFO L482 AbstractCegarLoop]: Abstraction has 22155 states and 58457 transitions. [2021-06-05 03:58:45,411 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.333333333333333) internal successors, (65), 14 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:45,411 INFO L276 IsEmpty]: Start isEmpty. Operand 22155 states and 58457 transitions. [2021-06-05 03:58:45,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 03:58:45,426 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:58:45,426 INFO L521 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:58:45,626 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 597 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1279 [2021-06-05 03:58:45,627 INFO L430 AbstractCegarLoop]: === Iteration 606 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:58:45,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:58:45,627 INFO L82 PathProgramCache]: Analyzing trace with hash -1000267853, now seen corresponding path program 370 times [2021-06-05 03:58:45,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:58:45,627 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511732785] [2021-06-05 03:58:45,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:58:45,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:45,712 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 70 proven. 156 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:58:45,712 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:58:45,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511732785] [2021-06-05 03:58:45,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511732785] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:45,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933228754] [2021-06-05 03:58:45,712 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 598 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 598 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:45,740 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:58:45,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:58:45,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 03:58:45,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:58:45,825 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 70 proven. 156 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:58:45,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933228754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:45,825 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:58:45,825 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-06-05 03:58:45,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295530225] [2021-06-05 03:58:45,825 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 03:58:45,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:58:45,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 03:58:45,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:58:45,826 INFO L87 Difference]: Start difference. First operand 22155 states and 58457 transitions. Second operand has 15 states, 15 states have (on average 4.266666666666667) internal successors, (64), 14 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:46,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:58:46,081 INFO L93 Difference]: Finished difference Result 26448 states and 65859 transitions. [2021-06-05 03:58:46,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 03:58:46,081 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.266666666666667) internal successors, (64), 14 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 03:58:46,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:58:46,112 INFO L225 Difference]: With dead ends: 26448 [2021-06-05 03:58:46,112 INFO L226 Difference]: Without dead ends: 26415 [2021-06-05 03:58:46,112 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 101.6ms TimeCoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:58:46,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26415 states. [2021-06-05 03:58:46,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26415 to 21652. [2021-06-05 03:58:46,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21652 states, 21651 states have (on average 2.6335504133758256) internal successors, (57019), 21651 states have internal predecessors, (57019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:46,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21652 states to 21652 states and 57019 transitions. [2021-06-05 03:58:46,417 INFO L78 Accepts]: Start accepts. Automaton has 21652 states and 57019 transitions. Word has length 65 [2021-06-05 03:58:46,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:58:46,417 INFO L482 AbstractCegarLoop]: Abstraction has 21652 states and 57019 transitions. [2021-06-05 03:58:46,417 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.266666666666667) internal successors, (64), 14 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:46,417 INFO L276 IsEmpty]: Start isEmpty. Operand 21652 states and 57019 transitions. [2021-06-05 03:58:46,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 03:58:46,432 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:58:46,432 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:58:46,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1280,598 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:46,632 INFO L430 AbstractCegarLoop]: === Iteration 607 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:58:46,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:58:46,632 INFO L82 PathProgramCache]: Analyzing trace with hash -1446562040, now seen corresponding path program 371 times [2021-06-05 03:58:46,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:58:46,632 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586590317] [2021-06-05 03:58:46,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:58:46,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:46,751 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 207 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:58:46,752 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:58:46,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586590317] [2021-06-05 03:58:46,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586590317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:46,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060775653] [2021-06-05 03:58:46,752 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 599 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 599 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:46,785 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-06-05 03:58:46,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:58:46,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 03:58:46,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:58:46,869 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 207 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:58:46,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060775653] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:46,870 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:58:46,870 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 03:58:46,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850649460] [2021-06-05 03:58:46,870 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:58:46,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:58:46,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:58:46,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:58:46,870 INFO L87 Difference]: Start difference. First operand 21652 states and 57019 transitions. Second operand has 16 states, 16 states have (on average 4.125) internal successors, (66), 15 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:47,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:58:47,711 INFO L93 Difference]: Finished difference Result 27644 states and 69399 transitions. [2021-06-05 03:58:47,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 03:58:47,711 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.125) internal successors, (66), 15 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 03:58:47,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:58:47,743 INFO L225 Difference]: With dead ends: 27644 [2021-06-05 03:58:47,743 INFO L226 Difference]: Without dead ends: 27488 [2021-06-05 03:58:47,744 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 262.7ms TimeCoverageRelationStatistics Valid=119, Invalid=811, Unknown=0, NotChecked=0, Total=930 [2021-06-05 03:58:47,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27488 states. [2021-06-05 03:58:47,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27488 to 21271. [2021-06-05 03:58:48,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21271 states, 21270 states have (on average 2.630747531734838) internal successors, (55956), 21270 states have internal predecessors, (55956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:48,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21271 states to 21271 states and 55956 transitions. [2021-06-05 03:58:48,054 INFO L78 Accepts]: Start accepts. Automaton has 21271 states and 55956 transitions. Word has length 65 [2021-06-05 03:58:48,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:58:48,054 INFO L482 AbstractCegarLoop]: Abstraction has 21271 states and 55956 transitions. [2021-06-05 03:58:48,054 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.125) internal successors, (66), 15 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:48,054 INFO L276 IsEmpty]: Start isEmpty. Operand 21271 states and 55956 transitions. [2021-06-05 03:58:48,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 03:58:48,069 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:58:48,069 INFO L521 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:58:48,270 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1285,599 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:48,270 INFO L430 AbstractCegarLoop]: === Iteration 608 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:58:48,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:58:48,270 INFO L82 PathProgramCache]: Analyzing trace with hash 1988463329, now seen corresponding path program 178 times [2021-06-05 03:58:48,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:58:48,270 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000219077] [2021-06-05 03:58:48,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:58:48,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:48,424 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 167 proven. 59 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:58:48,424 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:58:48,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000219077] [2021-06-05 03:58:48,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000219077] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:48,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966376862] [2021-06-05 03:58:48,424 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 600 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 600 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:48,452 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:58:48,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:58:48,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 03:58:48,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:58:48,545 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 168 proven. 59 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:58:48,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966376862] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:48,545 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:58:48,545 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2021-06-05 03:58:48,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767832899] [2021-06-05 03:58:48,546 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:58:48,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:58:48,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:58:48,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=107, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:58:48,546 INFO L87 Difference]: Start difference. First operand 21271 states and 55956 transitions. Second operand has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:48,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:58:48,813 INFO L93 Difference]: Finished difference Result 33905 states and 83190 transitions. [2021-06-05 03:58:48,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 03:58:48,814 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 03:58:48,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:58:48,854 INFO L225 Difference]: With dead ends: 33905 [2021-06-05 03:58:48,854 INFO L226 Difference]: Without dead ends: 33905 [2021-06-05 03:58:48,855 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 177.0ms TimeCoverageRelationStatistics Valid=131, Invalid=175, Unknown=0, NotChecked=0, Total=306 [2021-06-05 03:58:48,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33905 states. [2021-06-05 03:58:49,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33905 to 21594. [2021-06-05 03:58:49,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21594 states, 21593 states have (on average 2.637567730282962) internal successors, (56953), 21593 states have internal predecessors, (56953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:49,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21594 states to 21594 states and 56953 transitions. [2021-06-05 03:58:49,217 INFO L78 Accepts]: Start accepts. Automaton has 21594 states and 56953 transitions. Word has length 65 [2021-06-05 03:58:49,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:58:49,217 INFO L482 AbstractCegarLoop]: Abstraction has 21594 states and 56953 transitions. [2021-06-05 03:58:49,217 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:49,218 INFO L276 IsEmpty]: Start isEmpty. Operand 21594 states and 56953 transitions. [2021-06-05 03:58:49,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 03:58:49,232 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:58:49,232 INFO L521 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:58:49,432 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 600 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1286 [2021-06-05 03:58:49,432 INFO L430 AbstractCegarLoop]: === Iteration 609 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:58:49,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:58:49,432 INFO L82 PathProgramCache]: Analyzing trace with hash 350890873, now seen corresponding path program 179 times [2021-06-05 03:58:49,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:58:49,432 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133005129] [2021-06-05 03:58:49,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:58:49,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:49,516 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 163 proven. 63 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:58:49,516 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:58:49,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133005129] [2021-06-05 03:58:49,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133005129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:49,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302661393] [2021-06-05 03:58:49,516 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 601 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 601 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:49,554 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-06-05 03:58:49,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:58:49,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 03:58:49,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:58:49,733 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 165 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:49,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302661393] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:49,733 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:58:49,734 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 20] total 23 [2021-06-05 03:58:49,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177119803] [2021-06-05 03:58:49,734 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 03:58:49,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:58:49,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 03:58:49,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=367, Unknown=0, NotChecked=0, Total=552 [2021-06-05 03:58:49,734 INFO L87 Difference]: Start difference. First operand 21594 states and 56953 transitions. Second operand has 24 states, 24 states have (on average 3.75) internal successors, (90), 23 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:50,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:58:50,294 INFO L93 Difference]: Finished difference Result 37416 states and 91139 transitions. [2021-06-05 03:58:50,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 03:58:50,295 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.75) internal successors, (90), 23 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 03:58:50,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:58:50,337 INFO L225 Difference]: With dead ends: 37416 [2021-06-05 03:58:50,337 INFO L226 Difference]: Without dead ends: 37416 [2021-06-05 03:58:50,337 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 311.3ms TimeCoverageRelationStatistics Valid=476, Invalid=784, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 03:58:50,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37416 states. [2021-06-05 03:58:50,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37416 to 21628. [2021-06-05 03:58:50,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21628 states, 21627 states have (on average 2.6370277893374023) internal successors, (57031), 21627 states have internal predecessors, (57031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:50,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21628 states to 21628 states and 57031 transitions. [2021-06-05 03:58:50,710 INFO L78 Accepts]: Start accepts. Automaton has 21628 states and 57031 transitions. Word has length 65 [2021-06-05 03:58:50,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:58:50,710 INFO L482 AbstractCegarLoop]: Abstraction has 21628 states and 57031 transitions. [2021-06-05 03:58:50,710 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 3.75) internal successors, (90), 23 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:50,710 INFO L276 IsEmpty]: Start isEmpty. Operand 21628 states and 57031 transitions. [2021-06-05 03:58:50,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 03:58:50,724 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:58:50,724 INFO L521 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:58:50,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 601 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1287 [2021-06-05 03:58:50,925 INFO L430 AbstractCegarLoop]: === Iteration 610 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:58:50,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:58:50,925 INFO L82 PathProgramCache]: Analyzing trace with hash -1339104291, now seen corresponding path program 180 times [2021-06-05 03:58:50,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:58:50,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883972201] [2021-06-05 03:58:50,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:58:50,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:51,013 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 147 proven. 79 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:58:51,013 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:58:51,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883972201] [2021-06-05 03:58:51,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883972201] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:51,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603980287] [2021-06-05 03:58:51,013 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 602 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 602 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:51,047 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-06-05 03:58:51,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:58:51,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 03:58:51,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:58:51,140 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 148 proven. 79 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:58:51,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603980287] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:51,140 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:58:51,141 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 15 [2021-06-05 03:58:51,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792564343] [2021-06-05 03:58:51,141 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:58:51,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:58:51,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:58:51,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:58:51,141 INFO L87 Difference]: Start difference. First operand 21628 states and 57031 transitions. Second operand has 16 states, 16 states have (on average 4.3125) internal successors, (69), 15 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:51,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:58:51,504 INFO L93 Difference]: Finished difference Result 33319 states and 81655 transitions. [2021-06-05 03:58:51,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 03:58:51,504 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.3125) internal successors, (69), 15 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 03:58:51,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:58:51,543 INFO L225 Difference]: With dead ends: 33319 [2021-06-05 03:58:51,543 INFO L226 Difference]: Without dead ends: 33319 [2021-06-05 03:58:51,543 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 144.7ms TimeCoverageRelationStatistics Valid=217, Invalid=335, Unknown=0, NotChecked=0, Total=552 [2021-06-05 03:58:51,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33319 states. [2021-06-05 03:58:51,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33319 to 21577. [2021-06-05 03:58:51,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21577 states, 21576 states have (on average 2.6354746014089727) internal successors, (56863), 21576 states have internal predecessors, (56863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:51,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21577 states to 21577 states and 56863 transitions. [2021-06-05 03:58:51,927 INFO L78 Accepts]: Start accepts. Automaton has 21577 states and 56863 transitions. Word has length 65 [2021-06-05 03:58:51,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:58:51,927 INFO L482 AbstractCegarLoop]: Abstraction has 21577 states and 56863 transitions. [2021-06-05 03:58:51,927 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.3125) internal successors, (69), 15 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:51,927 INFO L276 IsEmpty]: Start isEmpty. Operand 21577 states and 56863 transitions. [2021-06-05 03:58:51,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 03:58:51,941 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:58:51,941 INFO L521 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:58:52,141 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1288,602 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:52,141 INFO L430 AbstractCegarLoop]: === Iteration 611 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:58:52,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:58:52,141 INFO L82 PathProgramCache]: Analyzing trace with hash 1916575993, now seen corresponding path program 181 times [2021-06-05 03:58:52,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:58:52,142 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420772551] [2021-06-05 03:58:52,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:58:52,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:52,240 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 131 proven. 96 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:58:52,240 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:58:52,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420772551] [2021-06-05 03:58:52,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420772551] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:52,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857742781] [2021-06-05 03:58:52,240 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 603 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 603 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:52,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:52,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 03:58:52,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:58:52,362 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 132 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:52,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857742781] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:52,363 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:58:52,363 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 16 [2021-06-05 03:58:52,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764394648] [2021-06-05 03:58:52,363 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 03:58:52,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:58:52,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 03:58:52,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:58:52,363 INFO L87 Difference]: Start difference. First operand 21577 states and 56863 transitions. Second operand has 17 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 16 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:52,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:58:52,690 INFO L93 Difference]: Finished difference Result 28453 states and 70741 transitions. [2021-06-05 03:58:52,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 03:58:52,691 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 16 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 03:58:52,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:58:52,723 INFO L225 Difference]: With dead ends: 28453 [2021-06-05 03:58:52,723 INFO L226 Difference]: Without dead ends: 28453 [2021-06-05 03:58:52,724 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 151.1ms TimeCoverageRelationStatistics Valid=206, Invalid=346, Unknown=0, NotChecked=0, Total=552 [2021-06-05 03:58:52,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28453 states. [2021-06-05 03:58:52,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28453 to 21132. [2021-06-05 03:58:53,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21132 states, 21131 states have (on average 2.630921395106715) internal successors, (55594), 21131 states have internal predecessors, (55594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:53,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21132 states to 21132 states and 55594 transitions. [2021-06-05 03:58:53,038 INFO L78 Accepts]: Start accepts. Automaton has 21132 states and 55594 transitions. Word has length 65 [2021-06-05 03:58:53,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:58:53,038 INFO L482 AbstractCegarLoop]: Abstraction has 21132 states and 55594 transitions. [2021-06-05 03:58:53,038 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 16 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:53,038 INFO L276 IsEmpty]: Start isEmpty. Operand 21132 states and 55594 transitions. [2021-06-05 03:58:53,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 03:58:53,052 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:58:53,052 INFO L521 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:58:53,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 603 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1289 [2021-06-05 03:58:53,253 INFO L430 AbstractCegarLoop]: === Iteration 612 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:58:53,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:58:53,253 INFO L82 PathProgramCache]: Analyzing trace with hash 447010829, now seen corresponding path program 372 times [2021-06-05 03:58:53,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:58:53,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222616984] [2021-06-05 03:58:53,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:58:53,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:53,362 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 78 proven. 149 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:58:53,362 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:58:53,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222616984] [2021-06-05 03:58:53,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222616984] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:53,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233779110] [2021-06-05 03:58:53,362 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 604 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 604 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:53,393 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-05 03:58:53,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:58:53,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 03:58:53,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:58:53,478 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 78 proven. 149 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:58:53,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233779110] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:53,478 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:58:53,478 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-06-05 03:58:53,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997831599] [2021-06-05 03:58:53,478 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:58:53,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:58:53,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:58:53,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:58:53,479 INFO L87 Difference]: Start difference. First operand 21132 states and 55594 transitions. Second operand has 16 states, 16 states have (on average 4.0) internal successors, (64), 15 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:53,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:58:53,731 INFO L93 Difference]: Finished difference Result 25089 states and 62416 transitions. [2021-06-05 03:58:53,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 03:58:53,732 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.0) internal successors, (64), 15 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 03:58:53,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:58:53,762 INFO L225 Difference]: With dead ends: 25089 [2021-06-05 03:58:53,762 INFO L226 Difference]: Without dead ends: 25053 [2021-06-05 03:58:53,762 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 121.7ms TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:58:53,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25053 states. [2021-06-05 03:58:54,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25053 to 21132. [2021-06-05 03:58:54,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21132 states, 21131 states have (on average 2.6304954805735647) internal successors, (55585), 21131 states have internal predecessors, (55585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:54,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21132 states to 21132 states and 55585 transitions. [2021-06-05 03:58:54,064 INFO L78 Accepts]: Start accepts. Automaton has 21132 states and 55585 transitions. Word has length 65 [2021-06-05 03:58:54,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:58:54,064 INFO L482 AbstractCegarLoop]: Abstraction has 21132 states and 55585 transitions. [2021-06-05 03:58:54,064 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.0) internal successors, (64), 15 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:54,064 INFO L276 IsEmpty]: Start isEmpty. Operand 21132 states and 55585 transitions. [2021-06-05 03:58:54,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 03:58:54,079 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:58:54,079 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:58:54,279 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1290,604 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:54,279 INFO L430 AbstractCegarLoop]: === Iteration 613 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:58:54,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:58:54,279 INFO L82 PathProgramCache]: Analyzing trace with hash -749006070, now seen corresponding path program 182 times [2021-06-05 03:58:54,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:58:54,280 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037912271] [2021-06-05 03:58:54,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:58:54,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:54,377 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 10 proven. 213 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:58:54,377 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:58:54,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037912271] [2021-06-05 03:58:54,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037912271] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:54,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864660166] [2021-06-05 03:58:54,377 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 605 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 605 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:54,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:58:54,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:58:54,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 03:58:54,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:58:54,510 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 9 proven. 214 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:58:54,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864660166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:54,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:58:54,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 03:58:54,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347547287] [2021-06-05 03:58:54,511 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 03:58:54,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:58:54,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 03:58:54,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:58:54,511 INFO L87 Difference]: Start difference. First operand 21132 states and 55585 transitions. Second operand has 13 states, 13 states have (on average 5.0) internal successors, (65), 12 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:55,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:58:55,192 INFO L93 Difference]: Finished difference Result 23500 states and 60212 transitions. [2021-06-05 03:58:55,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 03:58:55,192 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.0) internal successors, (65), 12 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 03:58:55,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:58:55,216 INFO L225 Difference]: With dead ends: 23500 [2021-06-05 03:58:55,217 INFO L226 Difference]: Without dead ends: 23462 [2021-06-05 03:58:55,217 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 157.4ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:58:55,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23462 states. [2021-06-05 03:58:55,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23462 to 21360. [2021-06-05 03:58:55,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21360 states, 21359 states have (on average 2.6287747553724423) internal successors, (56148), 21359 states have internal predecessors, (56148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:55,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21360 states to 21360 states and 56148 transitions. [2021-06-05 03:58:55,496 INFO L78 Accepts]: Start accepts. Automaton has 21360 states and 56148 transitions. Word has length 65 [2021-06-05 03:58:55,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:58:55,496 INFO L482 AbstractCegarLoop]: Abstraction has 21360 states and 56148 transitions. [2021-06-05 03:58:55,496 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.0) internal successors, (65), 12 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:55,496 INFO L276 IsEmpty]: Start isEmpty. Operand 21360 states and 56148 transitions. [2021-06-05 03:58:55,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 03:58:55,511 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:58:55,511 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:58:55,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1296,605 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:55,712 INFO L430 AbstractCegarLoop]: === Iteration 614 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:58:55,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:58:55,712 INFO L82 PathProgramCache]: Analyzing trace with hash 751326922, now seen corresponding path program 373 times [2021-06-05 03:58:55,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:58:55,712 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247408232] [2021-06-05 03:58:55,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:58:55,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:55,802 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 22 proven. 201 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:58:55,802 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:58:55,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247408232] [2021-06-05 03:58:55,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247408232] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:55,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565520358] [2021-06-05 03:58:55,802 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 606 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 606 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:55,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:55,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 03:58:55,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:58:55,927 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 17 proven. 206 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:58:55,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565520358] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:55,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:58:55,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 03:58:55,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192994914] [2021-06-05 03:58:55,928 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 03:58:55,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:58:55,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 03:58:55,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:58:55,928 INFO L87 Difference]: Start difference. First operand 21360 states and 56148 transitions. Second operand has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 12 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:56,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:58:56,723 INFO L93 Difference]: Finished difference Result 22708 states and 58520 transitions. [2021-06-05 03:58:56,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 03:58:56,724 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 12 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 03:58:56,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:58:56,748 INFO L225 Difference]: With dead ends: 22708 [2021-06-05 03:58:56,748 INFO L226 Difference]: Without dead ends: 22616 [2021-06-05 03:58:56,748 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 158.0ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:58:56,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22616 states. [2021-06-05 03:58:56,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22616 to 21349. [2021-06-05 03:58:56,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21349 states, 21348 states have (on average 2.6255386921491475) internal successors, (56050), 21348 states have internal predecessors, (56050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:57,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21349 states to 21349 states and 56050 transitions. [2021-06-05 03:58:57,029 INFO L78 Accepts]: Start accepts. Automaton has 21349 states and 56050 transitions. Word has length 65 [2021-06-05 03:58:57,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:58:57,029 INFO L482 AbstractCegarLoop]: Abstraction has 21349 states and 56050 transitions. [2021-06-05 03:58:57,029 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 12 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:57,029 INFO L276 IsEmpty]: Start isEmpty. Operand 21349 states and 56050 transitions. [2021-06-05 03:58:57,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 03:58:57,044 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:58:57,044 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:58:57,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 606 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1297 [2021-06-05 03:58:57,245 INFO L430 AbstractCegarLoop]: === Iteration 615 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:58:57,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:58:57,245 INFO L82 PathProgramCache]: Analyzing trace with hash 137790742, now seen corresponding path program 374 times [2021-06-05 03:58:57,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:58:57,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194022676] [2021-06-05 03:58:57,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:58:57,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:57,342 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 19 proven. 202 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 03:58:57,342 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:58:57,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194022676] [2021-06-05 03:58:57,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194022676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:57,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546323820] [2021-06-05 03:58:57,343 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 607 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 607 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:57,371 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:58:57,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:58:57,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 03:58:57,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:58:57,457 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 203 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 03:58:57,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546323820] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:57,457 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:58:57,457 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 03:58:57,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004951226] [2021-06-05 03:58:57,457 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 03:58:57,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:58:57,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 03:58:57,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:58:57,458 INFO L87 Difference]: Start difference. First operand 21349 states and 56050 transitions. Second operand has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:58,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:58:58,072 INFO L93 Difference]: Finished difference Result 23448 states and 60119 transitions. [2021-06-05 03:58:58,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 03:58:58,073 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 03:58:58,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:58:58,097 INFO L225 Difference]: With dead ends: 23448 [2021-06-05 03:58:58,097 INFO L226 Difference]: Without dead ends: 23436 [2021-06-05 03:58:58,098 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 158.2ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:58:58,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23436 states. [2021-06-05 03:58:58,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23436 to 21445. [2021-06-05 03:58:58,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21445 states, 21444 states have (on average 2.624743518000373) internal successors, (56285), 21444 states have internal predecessors, (56285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:58,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21445 states to 21445 states and 56285 transitions. [2021-06-05 03:58:58,491 INFO L78 Accepts]: Start accepts. Automaton has 21445 states and 56285 transitions. Word has length 65 [2021-06-05 03:58:58,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:58:58,491 INFO L482 AbstractCegarLoop]: Abstraction has 21445 states and 56285 transitions. [2021-06-05 03:58:58,491 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:58,491 INFO L276 IsEmpty]: Start isEmpty. Operand 21445 states and 56285 transitions. [2021-06-05 03:58:58,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 03:58:58,504 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:58:58,504 INFO L521 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:58:58,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 607 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1298 [2021-06-05 03:58:58,704 INFO L430 AbstractCegarLoop]: === Iteration 616 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:58:58,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:58:58,705 INFO L82 PathProgramCache]: Analyzing trace with hash -1510566761, now seen corresponding path program 375 times [2021-06-05 03:58:58,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:58:58,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256385411] [2021-06-05 03:58:58,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:58:58,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:58,772 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 64 proven. 161 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:58:58,772 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:58:58,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256385411] [2021-06-05 03:58:58,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256385411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:58,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603578193] [2021-06-05 03:58:58,772 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 608 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 608 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:58,805 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-06-05 03:58:58,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:58:58,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 03:58:58,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:58:58,889 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 64 proven. 161 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:58:58,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603578193] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:58,889 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:58:58,890 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-06-05 03:58:58,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974753412] [2021-06-05 03:58:58,890 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 03:58:58,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:58:58,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 03:58:58,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:58:58,890 INFO L87 Difference]: Start difference. First operand 21445 states and 56285 transitions. Second operand has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:59,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:58:59,109 INFO L93 Difference]: Finished difference Result 26049 states and 64269 transitions. [2021-06-05 03:58:59,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 03:58:59,110 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 03:58:59,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:58:59,139 INFO L225 Difference]: With dead ends: 26049 [2021-06-05 03:58:59,139 INFO L226 Difference]: Without dead ends: 26031 [2021-06-05 03:58:59,139 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 75.8ms TimeCoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:58:59,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26031 states. [2021-06-05 03:58:59,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26031 to 21412. [2021-06-05 03:58:59,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21412 states, 21411 states have (on average 2.622623884918967) internal successors, (56153), 21411 states have internal predecessors, (56153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:59,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21412 states to 21412 states and 56153 transitions. [2021-06-05 03:58:59,435 INFO L78 Accepts]: Start accepts. Automaton has 21412 states and 56153 transitions. Word has length 65 [2021-06-05 03:58:59,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:58:59,435 INFO L482 AbstractCegarLoop]: Abstraction has 21412 states and 56153 transitions. [2021-06-05 03:58:59,435 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:59,435 INFO L276 IsEmpty]: Start isEmpty. Operand 21412 states and 56153 transitions. [2021-06-05 03:58:59,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 03:58:59,449 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:58:59,449 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:58:59,650 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 608 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1299 [2021-06-05 03:58:59,650 INFO L430 AbstractCegarLoop]: === Iteration 617 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:58:59,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:58:59,650 INFO L82 PathProgramCache]: Analyzing trace with hash -2015259220, now seen corresponding path program 376 times [2021-06-05 03:58:59,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:58:59,650 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737252286] [2021-06-05 03:58:59,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:58:59,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:59,748 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 19 proven. 204 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:58:59,748 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:58:59,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737252286] [2021-06-05 03:58:59,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737252286] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:59,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776657024] [2021-06-05 03:58:59,748 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 609 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 609 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:59,777 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:58:59,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:58:59,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 03:58:59,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:58:59,863 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 205 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:58:59,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776657024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:59,863 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:58:59,864 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 03:58:59,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571858534] [2021-06-05 03:58:59,864 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:58:59,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:58:59,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:58:59,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:58:59,864 INFO L87 Difference]: Start difference. First operand 21412 states and 56153 transitions. Second operand has 14 states, 14 states have (on average 4.642857142857143) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:00,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:00,676 INFO L93 Difference]: Finished difference Result 25666 states and 64906 transitions. [2021-06-05 03:59:00,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 03:59:00,676 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.642857142857143) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 03:59:00,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:00,705 INFO L225 Difference]: With dead ends: 25666 [2021-06-05 03:59:00,705 INFO L226 Difference]: Without dead ends: 25612 [2021-06-05 03:59:00,705 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 70 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 241.2ms TimeCoverageRelationStatistics Valid=111, Invalid=819, Unknown=0, NotChecked=0, Total=930 [2021-06-05 03:59:00,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25612 states. [2021-06-05 03:59:00,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25612 to 21675. [2021-06-05 03:59:00,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21675 states, 21674 states have (on average 2.6232813509273782) internal successors, (56857), 21674 states have internal predecessors, (56857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:00,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21675 states to 21675 states and 56857 transitions. [2021-06-05 03:59:00,996 INFO L78 Accepts]: Start accepts. Automaton has 21675 states and 56857 transitions. Word has length 65 [2021-06-05 03:59:00,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:00,996 INFO L482 AbstractCegarLoop]: Abstraction has 21675 states and 56857 transitions. [2021-06-05 03:59:00,996 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.642857142857143) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:00,996 INFO L276 IsEmpty]: Start isEmpty. Operand 21675 states and 56857 transitions. [2021-06-05 03:59:01,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 03:59:01,010 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:01,011 INFO L521 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:01,211 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 609 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1302 [2021-06-05 03:59:01,211 INFO L430 AbstractCegarLoop]: === Iteration 618 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:01,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:01,211 INFO L82 PathProgramCache]: Analyzing trace with hash -482700111, now seen corresponding path program 377 times [2021-06-05 03:59:01,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:01,211 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105241026] [2021-06-05 03:59:01,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:01,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:01,287 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 61 proven. 165 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:59:01,288 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:01,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105241026] [2021-06-05 03:59:01,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105241026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:01,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708931243] [2021-06-05 03:59:01,288 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 610 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 610 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:01,320 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-06-05 03:59:01,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:59:01,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 03:59:01,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:01,433 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 62 proven. 165 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:59:01,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708931243] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:01,433 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:01,433 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 18 [2021-06-05 03:59:01,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112928497] [2021-06-05 03:59:01,433 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:59:01,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:01,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:59:01,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:59:01,433 INFO L87 Difference]: Start difference. First operand 21675 states and 56857 transitions. Second operand has 19 states, 19 states have (on average 4.7894736842105265) internal successors, (91), 18 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:01,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:01,786 INFO L93 Difference]: Finished difference Result 26526 states and 65340 transitions. [2021-06-05 03:59:01,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 03:59:01,787 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.7894736842105265) internal successors, (91), 18 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 03:59:01,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:01,816 INFO L225 Difference]: With dead ends: 26526 [2021-06-05 03:59:01,816 INFO L226 Difference]: Without dead ends: 26502 [2021-06-05 03:59:01,817 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 117.9ms TimeCoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2021-06-05 03:59:01,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26502 states. [2021-06-05 03:59:02,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26502 to 21675. [2021-06-05 03:59:02,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21675 states, 21674 states have (on average 2.6224508627849037) internal successors, (56839), 21674 states have internal predecessors, (56839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:02,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21675 states to 21675 states and 56839 transitions. [2021-06-05 03:59:02,158 INFO L78 Accepts]: Start accepts. Automaton has 21675 states and 56839 transitions. Word has length 65 [2021-06-05 03:59:02,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:02,158 INFO L482 AbstractCegarLoop]: Abstraction has 21675 states and 56839 transitions. [2021-06-05 03:59:02,158 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.7894736842105265) internal successors, (91), 18 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:02,158 INFO L276 IsEmpty]: Start isEmpty. Operand 21675 states and 56839 transitions. [2021-06-05 03:59:02,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 03:59:02,175 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:02,175 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:02,375 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1303,610 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:02,375 INFO L430 AbstractCegarLoop]: === Iteration 619 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:02,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:02,376 INFO L82 PathProgramCache]: Analyzing trace with hash -1860422686, now seen corresponding path program 378 times [2021-06-05 03:59:02,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:02,376 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612621186] [2021-06-05 03:59:02,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:02,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:02,483 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 19 proven. 204 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:59:02,483 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:02,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612621186] [2021-06-05 03:59:02,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612621186] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:02,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72735656] [2021-06-05 03:59:02,483 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 611 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 611 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:02,517 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-06-05 03:59:02,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:59:02,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 03:59:02,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:02,603 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 205 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:59:02,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72735656] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:02,603 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:02,603 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 03:59:02,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710978634] [2021-06-05 03:59:02,603 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 03:59:02,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:02,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 03:59:02,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:59:02,603 INFO L87 Difference]: Start difference. First operand 21675 states and 56839 transitions. Second operand has 15 states, 15 states have (on average 4.333333333333333) internal successors, (65), 14 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:03,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:03,683 INFO L93 Difference]: Finished difference Result 30486 states and 75594 transitions. [2021-06-05 03:59:03,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 03:59:03,683 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.333333333333333) internal successors, (65), 14 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 03:59:03,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:03,717 INFO L225 Difference]: With dead ends: 30486 [2021-06-05 03:59:03,717 INFO L226 Difference]: Without dead ends: 30306 [2021-06-05 03:59:03,717 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 69 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 411.9ms TimeCoverageRelationStatistics Valid=237, Invalid=1925, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 03:59:03,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30306 states. [2021-06-05 03:59:04,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30306 to 22166. [2021-06-05 03:59:04,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22166 states, 22165 states have (on average 2.6220618091585832) internal successors, (58118), 22165 states have internal predecessors, (58118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:04,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22166 states to 22166 states and 58118 transitions. [2021-06-05 03:59:04,056 INFO L78 Accepts]: Start accepts. Automaton has 22166 states and 58118 transitions. Word has length 65 [2021-06-05 03:59:04,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:04,056 INFO L482 AbstractCegarLoop]: Abstraction has 22166 states and 58118 transitions. [2021-06-05 03:59:04,056 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.333333333333333) internal successors, (65), 14 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:04,056 INFO L276 IsEmpty]: Start isEmpty. Operand 22166 states and 58118 transitions. [2021-06-05 03:59:04,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 03:59:04,070 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:04,070 INFO L521 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:04,271 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1307,611 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:04,271 INFO L430 AbstractCegarLoop]: === Iteration 620 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:04,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:04,271 INFO L82 PathProgramCache]: Analyzing trace with hash -1473820009, now seen corresponding path program 379 times [2021-06-05 03:59:04,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:04,271 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915228408] [2021-06-05 03:59:04,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:04,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:04,356 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 59 proven. 167 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:59:04,357 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:04,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915228408] [2021-06-05 03:59:04,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915228408] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:04,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500821296] [2021-06-05 03:59:04,357 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 612 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 612 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:04,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:04,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 03:59:04,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:04,470 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 59 proven. 167 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:59:04,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500821296] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:04,470 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:04,470 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-06-05 03:59:04,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549357908] [2021-06-05 03:59:04,470 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 03:59:04,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:04,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 03:59:04,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:59:04,471 INFO L87 Difference]: Start difference. First operand 22166 states and 58118 transitions. Second operand has 15 states, 15 states have (on average 4.266666666666667) internal successors, (64), 14 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:04,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:04,727 INFO L93 Difference]: Finished difference Result 26943 states and 66422 transitions. [2021-06-05 03:59:04,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 03:59:04,728 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.266666666666667) internal successors, (64), 14 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 03:59:04,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:04,758 INFO L225 Difference]: With dead ends: 26943 [2021-06-05 03:59:04,758 INFO L226 Difference]: Without dead ends: 26910 [2021-06-05 03:59:04,758 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 102.6ms TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:59:04,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26910 states. [2021-06-05 03:59:05,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26910 to 22166. [2021-06-05 03:59:05,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22166 states, 22165 states have (on average 2.6216557635912476) internal successors, (58109), 22165 states have internal predecessors, (58109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:05,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22166 states to 22166 states and 58109 transitions. [2021-06-05 03:59:05,071 INFO L78 Accepts]: Start accepts. Automaton has 22166 states and 58109 transitions. Word has length 65 [2021-06-05 03:59:05,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:05,071 INFO L482 AbstractCegarLoop]: Abstraction has 22166 states and 58109 transitions. [2021-06-05 03:59:05,071 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.266666666666667) internal successors, (64), 14 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:05,072 INFO L276 IsEmpty]: Start isEmpty. Operand 22166 states and 58109 transitions. [2021-06-05 03:59:05,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 03:59:05,086 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:05,086 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:05,287 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 612 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1308 [2021-06-05 03:59:05,287 INFO L430 AbstractCegarLoop]: === Iteration 621 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:05,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:05,287 INFO L82 PathProgramCache]: Analyzing trace with hash -1920114196, now seen corresponding path program 380 times [2021-06-05 03:59:05,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:05,287 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882206113] [2021-06-05 03:59:05,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:05,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:05,407 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 19 proven. 204 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:59:05,407 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:05,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882206113] [2021-06-05 03:59:05,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882206113] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:05,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179305712] [2021-06-05 03:59:05,408 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 613 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 613 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:05,436 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:59:05,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:59:05,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 03:59:05,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:05,612 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 205 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:59:05,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179305712] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:05,612 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:05,612 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 03:59:05,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741085460] [2021-06-05 03:59:05,612 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:59:05,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:05,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:59:05,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:59:05,613 INFO L87 Difference]: Start difference. First operand 22166 states and 58109 transitions. Second operand has 16 states, 16 states have (on average 4.0625) internal successors, (65), 15 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:07,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:07,085 INFO L93 Difference]: Finished difference Result 36934 states and 90171 transitions. [2021-06-05 03:59:07,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-06-05 03:59:07,085 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.0625) internal successors, (65), 15 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 03:59:07,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:07,127 INFO L225 Difference]: With dead ends: 36934 [2021-06-05 03:59:07,127 INFO L226 Difference]: Without dead ends: 36658 [2021-06-05 03:59:07,128 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1534 ImplicationChecksByTransitivity, 712.8ms TimeCoverageRelationStatistics Valid=507, Invalid=4463, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 03:59:07,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36658 states. [2021-06-05 03:59:07,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36658 to 22558. [2021-06-05 03:59:07,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22558 states, 22557 states have (on average 2.621492219710068) internal successors, (59133), 22557 states have internal predecessors, (59133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:07,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22558 states to 22558 states and 59133 transitions. [2021-06-05 03:59:07,505 INFO L78 Accepts]: Start accepts. Automaton has 22558 states and 59133 transitions. Word has length 65 [2021-06-05 03:59:07,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:07,505 INFO L482 AbstractCegarLoop]: Abstraction has 22558 states and 59133 transitions. [2021-06-05 03:59:07,505 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.0625) internal successors, (65), 15 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:07,505 INFO L276 IsEmpty]: Start isEmpty. Operand 22558 states and 59133 transitions. [2021-06-05 03:59:07,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 03:59:07,520 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:07,520 INFO L521 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:07,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 613 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1313 [2021-06-05 03:59:07,720 INFO L430 AbstractCegarLoop]: === Iteration 622 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:07,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:07,721 INFO L82 PathProgramCache]: Analyzing trace with hash -26541327, now seen corresponding path program 381 times [2021-06-05 03:59:07,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:07,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111848665] [2021-06-05 03:59:07,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:07,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:07,814 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 63 proven. 163 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:59:07,815 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:07,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111848665] [2021-06-05 03:59:07,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111848665] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:07,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400603192] [2021-06-05 03:59:07,815 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 614 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 614 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:07,847 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-05 03:59:07,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:59:07,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 03:59:07,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:07,932 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 63 proven. 163 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:59:07,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400603192] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:07,932 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:07,932 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-06-05 03:59:07,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000506002] [2021-06-05 03:59:07,932 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:59:07,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:07,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:59:07,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:59:07,933 INFO L87 Difference]: Start difference. First operand 22558 states and 59133 transitions. Second operand has 16 states, 16 states have (on average 4.0) internal successors, (64), 15 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:08,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:08,210 INFO L93 Difference]: Finished difference Result 27397 states and 67556 transitions. [2021-06-05 03:59:08,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 03:59:08,210 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.0) internal successors, (64), 15 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 03:59:08,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:08,240 INFO L225 Difference]: With dead ends: 27397 [2021-06-05 03:59:08,240 INFO L226 Difference]: Without dead ends: 27355 [2021-06-05 03:59:08,241 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 120.7ms TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:59:08,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27355 states. [2021-06-05 03:59:08,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27355 to 22069. [2021-06-05 03:59:08,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22069 states, 22068 states have (on average 2.616594163494653) internal successors, (57743), 22068 states have internal predecessors, (57743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:08,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22069 states to 22069 states and 57743 transitions. [2021-06-05 03:59:08,545 INFO L78 Accepts]: Start accepts. Automaton has 22069 states and 57743 transitions. Word has length 65 [2021-06-05 03:59:08,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:08,545 INFO L482 AbstractCegarLoop]: Abstraction has 22069 states and 57743 transitions. [2021-06-05 03:59:08,545 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.0) internal successors, (64), 15 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:08,545 INFO L276 IsEmpty]: Start isEmpty. Operand 22069 states and 57743 transitions. [2021-06-05 03:59:08,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 03:59:08,559 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:08,559 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:08,759 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1314,614 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:08,760 INFO L430 AbstractCegarLoop]: === Iteration 623 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:08,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:08,760 INFO L82 PathProgramCache]: Analyzing trace with hash -2073428062, now seen corresponding path program 382 times [2021-06-05 03:59:08,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:08,760 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527212576] [2021-06-05 03:59:08,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:08,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:08,890 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 207 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:59:08,891 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:08,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527212576] [2021-06-05 03:59:08,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527212576] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:08,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243689746] [2021-06-05 03:59:08,891 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 615 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 615 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:08,919 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:59:08,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:59:08,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 03:59:08,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:09,005 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 207 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:59:09,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243689746] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:09,005 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:09,005 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-06-05 03:59:09,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487323522] [2021-06-05 03:59:09,005 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 03:59:09,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:09,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 03:59:09,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:59:09,006 INFO L87 Difference]: Start difference. First operand 22069 states and 57743 transitions. Second operand has 17 states, 17 states have (on average 3.8823529411764706) internal successors, (66), 16 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:10,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:10,012 INFO L93 Difference]: Finished difference Result 30333 states and 75005 transitions. [2021-06-05 03:59:10,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 03:59:10,013 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.8823529411764706) internal successors, (66), 16 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 03:59:10,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:10,048 INFO L225 Difference]: With dead ends: 30333 [2021-06-05 03:59:10,048 INFO L226 Difference]: Without dead ends: 29955 [2021-06-05 03:59:10,049 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 371.3ms TimeCoverageRelationStatistics Valid=150, Invalid=972, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 03:59:10,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29955 states. [2021-06-05 03:59:10,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29955 to 20830. [2021-06-05 03:59:10,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20830 states, 20829 states have (on average 2.6126074223438476) internal successors, (54418), 20829 states have internal predecessors, (54418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:10,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20830 states to 20830 states and 54418 transitions. [2021-06-05 03:59:10,435 INFO L78 Accepts]: Start accepts. Automaton has 20830 states and 54418 transitions. Word has length 65 [2021-06-05 03:59:10,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:10,435 INFO L482 AbstractCegarLoop]: Abstraction has 20830 states and 54418 transitions. [2021-06-05 03:59:10,435 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.8823529411764706) internal successors, (66), 16 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:10,435 INFO L276 IsEmpty]: Start isEmpty. Operand 20830 states and 54418 transitions. [2021-06-05 03:59:10,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 03:59:10,449 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:10,450 INFO L521 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:10,650 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 615 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1320 [2021-06-05 03:59:10,650 INFO L430 AbstractCegarLoop]: === Iteration 624 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:10,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:10,650 INFO L82 PathProgramCache]: Analyzing trace with hash 1983477717, now seen corresponding path program 183 times [2021-06-05 03:59:10,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:10,650 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890373638] [2021-06-05 03:59:10,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:10,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:10,717 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 174 proven. 53 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:59:10,717 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:10,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890373638] [2021-06-05 03:59:10,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890373638] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:10,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086001220] [2021-06-05 03:59:10,717 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 616 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 616 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:10,752 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-06-05 03:59:10,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:59:10,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 03:59:10,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:10,839 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 175 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:10,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086001220] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:10,839 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:10,839 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2021-06-05 03:59:10,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175496793] [2021-06-05 03:59:10,840 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:59:10,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:10,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:59:10,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:59:10,840 INFO L87 Difference]: Start difference. First operand 20830 states and 54418 transitions. Second operand has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:11,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:11,084 INFO L93 Difference]: Finished difference Result 26854 states and 66816 transitions. [2021-06-05 03:59:11,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 03:59:11,084 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 03:59:11,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:11,114 INFO L225 Difference]: With dead ends: 26854 [2021-06-05 03:59:11,114 INFO L226 Difference]: Without dead ends: 26832 [2021-06-05 03:59:11,115 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 71.8ms TimeCoverageRelationStatistics Valid=98, Invalid=142, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:59:11,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26832 states. [2021-06-05 03:59:11,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26832 to 21370. [2021-06-05 03:59:11,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21370 states, 21369 states have (on average 2.616406944639431) internal successors, (55910), 21369 states have internal predecessors, (55910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:11,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21370 states to 21370 states and 55910 transitions. [2021-06-05 03:59:11,412 INFO L78 Accepts]: Start accepts. Automaton has 21370 states and 55910 transitions. Word has length 65 [2021-06-05 03:59:11,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:11,412 INFO L482 AbstractCegarLoop]: Abstraction has 21370 states and 55910 transitions. [2021-06-05 03:59:11,412 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:11,413 INFO L276 IsEmpty]: Start isEmpty. Operand 21370 states and 55910 transitions. [2021-06-05 03:59:11,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 03:59:11,427 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:11,427 INFO L521 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:11,627 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 616 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1321 [2021-06-05 03:59:11,627 INFO L430 AbstractCegarLoop]: === Iteration 625 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:11,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:11,627 INFO L82 PathProgramCache]: Analyzing trace with hash 1361597307, now seen corresponding path program 184 times [2021-06-05 03:59:11,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:11,627 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119407599] [2021-06-05 03:59:11,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:11,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:11,696 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 174 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:59:11,696 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:11,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119407599] [2021-06-05 03:59:11,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119407599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:11,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569654133] [2021-06-05 03:59:11,696 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 617 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 617 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:11,723 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:59:11,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:59:11,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 03:59:11,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:11,815 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 175 proven. 52 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:59:11,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569654133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:11,815 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:11,815 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2021-06-05 03:59:11,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948647595] [2021-06-05 03:59:11,815 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:59:11,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:11,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:59:11,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:59:11,816 INFO L87 Difference]: Start difference. First operand 21370 states and 55910 transitions. Second operand has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:12,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:12,142 INFO L93 Difference]: Finished difference Result 33593 states and 82285 transitions. [2021-06-05 03:59:12,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 03:59:12,143 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 03:59:12,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:12,182 INFO L225 Difference]: With dead ends: 33593 [2021-06-05 03:59:12,183 INFO L226 Difference]: Without dead ends: 33593 [2021-06-05 03:59:12,183 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 98.2ms TimeCoverageRelationStatistics Valid=146, Invalid=196, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:59:12,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33593 states. [2021-06-05 03:59:12,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33593 to 21389. [2021-06-05 03:59:12,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21389 states, 21388 states have (on average 2.6167477089956983) internal successors, (55967), 21388 states have internal predecessors, (55967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:12,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21389 states to 21389 states and 55967 transitions. [2021-06-05 03:59:12,534 INFO L78 Accepts]: Start accepts. Automaton has 21389 states and 55967 transitions. Word has length 65 [2021-06-05 03:59:12,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:12,534 INFO L482 AbstractCegarLoop]: Abstraction has 21389 states and 55967 transitions. [2021-06-05 03:59:12,534 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:12,534 INFO L276 IsEmpty]: Start isEmpty. Operand 21389 states and 55967 transitions. [2021-06-05 03:59:12,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 03:59:12,549 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:12,549 INFO L521 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:12,749 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 617 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1323 [2021-06-05 03:59:12,749 INFO L430 AbstractCegarLoop]: === Iteration 626 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:12,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:12,749 INFO L82 PathProgramCache]: Analyzing trace with hash -275975149, now seen corresponding path program 185 times [2021-06-05 03:59:12,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:12,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055042074] [2021-06-05 03:59:12,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:12,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:12,827 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 171 proven. 55 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:59:12,828 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:12,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055042074] [2021-06-05 03:59:12,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055042074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:12,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786396882] [2021-06-05 03:59:12,828 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 618 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 618 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:12,864 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-06-05 03:59:12,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:59:12,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 03:59:12,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:13,047 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 173 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:13,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786396882] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:13,048 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:13,048 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21] total 24 [2021-06-05 03:59:13,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354897005] [2021-06-05 03:59:13,048 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 03:59:13,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:13,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 03:59:13,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=394, Unknown=0, NotChecked=0, Total=600 [2021-06-05 03:59:13,048 INFO L87 Difference]: Start difference. First operand 21389 states and 55967 transitions. Second operand has 25 states, 25 states have (on average 3.72) internal successors, (93), 24 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:13,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:13,694 INFO L93 Difference]: Finished difference Result 38717 states and 94084 transitions. [2021-06-05 03:59:13,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 03:59:13,694 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.72) internal successors, (93), 24 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 03:59:13,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:13,737 INFO L225 Difference]: With dead ends: 38717 [2021-06-05 03:59:13,737 INFO L226 Difference]: Without dead ends: 38717 [2021-06-05 03:59:13,737 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 372.5ms TimeCoverageRelationStatistics Valid=617, Invalid=1023, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 03:59:13,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38717 states. [2021-06-05 03:59:14,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38717 to 21452. [2021-06-05 03:59:14,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21452 states, 21451 states have (on average 2.6186191785930726) internal successors, (56172), 21451 states have internal predecessors, (56172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:14,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21452 states to 21452 states and 56172 transitions. [2021-06-05 03:59:14,094 INFO L78 Accepts]: Start accepts. Automaton has 21452 states and 56172 transitions. Word has length 65 [2021-06-05 03:59:14,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:14,094 INFO L482 AbstractCegarLoop]: Abstraction has 21452 states and 56172 transitions. [2021-06-05 03:59:14,094 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 3.72) internal successors, (93), 24 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:14,094 INFO L276 IsEmpty]: Start isEmpty. Operand 21452 states and 56172 transitions. [2021-06-05 03:59:14,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 03:59:14,108 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:14,108 INFO L521 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:14,309 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1324,618 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:14,309 INFO L430 AbstractCegarLoop]: === Iteration 627 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:14,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:14,309 INFO L82 PathProgramCache]: Analyzing trace with hash -1965970313, now seen corresponding path program 186 times [2021-06-05 03:59:14,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:14,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940668107] [2021-06-05 03:59:14,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:14,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:14,399 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 158 proven. 68 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:59:14,399 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:14,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940668107] [2021-06-05 03:59:14,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940668107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:14,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215851758] [2021-06-05 03:59:14,400 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 619 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 619 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:14,435 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-06-05 03:59:14,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:59:14,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 03:59:14,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:14,532 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 159 proven. 68 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:59:14,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215851758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:14,533 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:14,533 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 15 [2021-06-05 03:59:14,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745458132] [2021-06-05 03:59:14,533 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:59:14,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:14,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:59:14,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:59:14,533 INFO L87 Difference]: Start difference. First operand 21452 states and 56172 transitions. Second operand has 16 states, 16 states have (on average 4.3125) internal successors, (69), 15 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:14,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:14,903 INFO L93 Difference]: Finished difference Result 36438 states and 88848 transitions. [2021-06-05 03:59:14,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 03:59:14,904 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.3125) internal successors, (69), 15 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 03:59:14,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:14,944 INFO L225 Difference]: With dead ends: 36438 [2021-06-05 03:59:14,944 INFO L226 Difference]: Without dead ends: 36438 [2021-06-05 03:59:14,945 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 173.3ms TimeCoverageRelationStatistics Valid=276, Invalid=426, Unknown=0, NotChecked=0, Total=702 [2021-06-05 03:59:14,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36438 states. [2021-06-05 03:59:15,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36438 to 21482. [2021-06-05 03:59:15,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21482 states, 21481 states have (on average 2.6190587030398955) internal successors, (56260), 21481 states have internal predecessors, (56260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:15,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21482 states to 21482 states and 56260 transitions. [2021-06-05 03:59:15,296 INFO L78 Accepts]: Start accepts. Automaton has 21482 states and 56260 transitions. Word has length 65 [2021-06-05 03:59:15,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:15,296 INFO L482 AbstractCegarLoop]: Abstraction has 21482 states and 56260 transitions. [2021-06-05 03:59:15,296 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.3125) internal successors, (69), 15 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:15,296 INFO L276 IsEmpty]: Start isEmpty. Operand 21482 states and 56260 transitions. [2021-06-05 03:59:15,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 03:59:15,310 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:15,310 INFO L521 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:15,511 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 619 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1325 [2021-06-05 03:59:15,511 INFO L430 AbstractCegarLoop]: === Iteration 628 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:15,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:15,511 INFO L82 PathProgramCache]: Analyzing trace with hash 1289709971, now seen corresponding path program 187 times [2021-06-05 03:59:15,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:15,511 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7414809] [2021-06-05 03:59:15,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:15,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:15,610 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 145 proven. 81 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:59:15,611 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:15,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7414809] [2021-06-05 03:59:15,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7414809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:15,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678064306] [2021-06-05 03:59:15,611 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 620 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 620 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:15,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:15,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 03:59:15,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:15,733 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 146 proven. 81 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:59:15,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678064306] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:15,733 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:15,733 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 16 [2021-06-05 03:59:15,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720543461] [2021-06-05 03:59:15,734 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 03:59:15,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:15,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 03:59:15,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:59:15,734 INFO L87 Difference]: Start difference. First operand 21482 states and 56260 transitions. Second operand has 17 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 16 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:16,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:16,157 INFO L93 Difference]: Finished difference Result 32841 states and 80457 transitions. [2021-06-05 03:59:16,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 03:59:16,157 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 16 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 03:59:16,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:16,195 INFO L225 Difference]: With dead ends: 32841 [2021-06-05 03:59:16,195 INFO L226 Difference]: Without dead ends: 32841 [2021-06-05 03:59:16,195 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 185.6ms TimeCoverageRelationStatistics Valid=290, Invalid=466, Unknown=0, NotChecked=0, Total=756 [2021-06-05 03:59:16,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32841 states. [2021-06-05 03:59:16,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32841 to 21485. [2021-06-05 03:59:16,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21485 states, 21484 states have (on average 2.618460249487991) internal successors, (56255), 21484 states have internal predecessors, (56255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:16,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21485 states to 21485 states and 56255 transitions. [2021-06-05 03:59:16,542 INFO L78 Accepts]: Start accepts. Automaton has 21485 states and 56255 transitions. Word has length 65 [2021-06-05 03:59:16,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:16,542 INFO L482 AbstractCegarLoop]: Abstraction has 21485 states and 56255 transitions. [2021-06-05 03:59:16,542 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 16 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:16,542 INFO L276 IsEmpty]: Start isEmpty. Operand 21485 states and 56255 transitions. [2021-06-05 03:59:16,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 03:59:16,556 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:16,556 INFO L521 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:16,757 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1326,620 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:16,757 INFO L430 AbstractCegarLoop]: === Iteration 629 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:16,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:16,757 INFO L82 PathProgramCache]: Analyzing trace with hash -1985394953, now seen corresponding path program 188 times [2021-06-05 03:59:16,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:16,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611907717] [2021-06-05 03:59:16,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:16,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:16,869 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 132 proven. 95 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:59:16,869 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:16,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611907717] [2021-06-05 03:59:16,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611907717] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:16,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525308506] [2021-06-05 03:59:16,869 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 621 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 621 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:16,898 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:59:16,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:59:16,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 03:59:16,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:16,994 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 133 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:16,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525308506] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:16,994 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:16,994 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 17 [2021-06-05 03:59:16,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463430448] [2021-06-05 03:59:16,994 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 03:59:16,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:16,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 03:59:16,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2021-06-05 03:59:16,994 INFO L87 Difference]: Start difference. First operand 21485 states and 56255 transitions. Second operand has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 17 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:17,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:17,385 INFO L93 Difference]: Finished difference Result 27627 states and 68779 transitions. [2021-06-05 03:59:17,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 03:59:17,385 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 17 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 03:59:17,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:17,417 INFO L225 Difference]: With dead ends: 27627 [2021-06-05 03:59:17,417 INFO L226 Difference]: Without dead ends: 27627 [2021-06-05 03:59:17,417 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 185.1ms TimeCoverageRelationStatistics Valid=256, Invalid=446, Unknown=0, NotChecked=0, Total=702 [2021-06-05 03:59:17,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27627 states. [2021-06-05 03:59:17,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27627 to 20986. [2021-06-05 03:59:17,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20986 states, 20985 states have (on average 2.6141053133190373) internal successors, (54857), 20985 states have internal predecessors, (54857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:17,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20986 states to 20986 states and 54857 transitions. [2021-06-05 03:59:17,749 INFO L78 Accepts]: Start accepts. Automaton has 20986 states and 54857 transitions. Word has length 65 [2021-06-05 03:59:17,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:17,749 INFO L482 AbstractCegarLoop]: Abstraction has 20986 states and 54857 transitions. [2021-06-05 03:59:17,749 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 17 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:17,749 INFO L276 IsEmpty]: Start isEmpty. Operand 20986 states and 54857 transitions. [2021-06-05 03:59:17,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 03:59:17,763 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:17,763 INFO L521 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:17,963 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1327,621 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:17,963 INFO L430 AbstractCegarLoop]: === Iteration 630 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:17,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:17,964 INFO L82 PathProgramCache]: Analyzing trace with hash -1324010409, now seen corresponding path program 383 times [2021-06-05 03:59:17,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:17,964 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679246822] [2021-06-05 03:59:17,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:17,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:18,082 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 74 proven. 153 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:59:18,082 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:18,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679246822] [2021-06-05 03:59:18,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679246822] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:18,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617639931] [2021-06-05 03:59:18,083 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 622 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 622 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:18,114 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-05 03:59:18,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:59:18,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 03:59:18,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:18,233 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 75 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:18,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617639931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:18,234 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:18,234 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 21 [2021-06-05 03:59:18,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055433963] [2021-06-05 03:59:18,234 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 03:59:18,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:18,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 03:59:18,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=345, Unknown=0, NotChecked=0, Total=462 [2021-06-05 03:59:18,234 INFO L87 Difference]: Start difference. First operand 20986 states and 54857 transitions. Second operand has 22 states, 22 states have (on average 4.136363636363637) internal successors, (91), 21 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:18,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:18,636 INFO L93 Difference]: Finished difference Result 25486 states and 62722 transitions. [2021-06-05 03:59:18,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 03:59:18,637 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.136363636363637) internal successors, (91), 21 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 03:59:18,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:18,666 INFO L225 Difference]: With dead ends: 25486 [2021-06-05 03:59:18,666 INFO L226 Difference]: Without dead ends: 25441 [2021-06-05 03:59:18,666 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 193.7ms TimeCoverageRelationStatistics Valid=188, Invalid=568, Unknown=0, NotChecked=0, Total=756 [2021-06-05 03:59:18,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25441 states. [2021-06-05 03:59:18,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25441 to 20986. [2021-06-05 03:59:18,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20986 states, 20985 states have (on average 2.613676435549202) internal successors, (54848), 20985 states have internal predecessors, (54848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:18,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20986 states to 20986 states and 54848 transitions. [2021-06-05 03:59:18,957 INFO L78 Accepts]: Start accepts. Automaton has 20986 states and 54848 transitions. Word has length 65 [2021-06-05 03:59:18,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:18,957 INFO L482 AbstractCegarLoop]: Abstraction has 20986 states and 54848 transitions. [2021-06-05 03:59:18,957 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.136363636363637) internal successors, (91), 21 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:18,957 INFO L276 IsEmpty]: Start isEmpty. Operand 20986 states and 54848 transitions. [2021-06-05 03:59:18,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 03:59:18,972 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:18,972 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:19,173 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1328,622 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:19,173 INFO L430 AbstractCegarLoop]: === Iteration 631 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:19,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:19,173 INFO L82 PathProgramCache]: Analyzing trace with hash 626281894, now seen corresponding path program 189 times [2021-06-05 03:59:19,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:19,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164262516] [2021-06-05 03:59:19,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:19,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:19,271 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 10 proven. 213 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:59:19,271 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:19,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164262516] [2021-06-05 03:59:19,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164262516] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:19,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293645394] [2021-06-05 03:59:19,271 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 623 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 623 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:19,308 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2021-06-05 03:59:19,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:59:19,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 03:59:19,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:19,395 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 9 proven. 214 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:59:19,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293645394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:19,396 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:19,396 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 03:59:19,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591997974] [2021-06-05 03:59:19,396 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 03:59:19,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:19,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 03:59:19,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:59:19,396 INFO L87 Difference]: Start difference. First operand 20986 states and 54848 transitions. Second operand has 13 states, 13 states have (on average 5.0) internal successors, (65), 12 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:20,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:20,029 INFO L93 Difference]: Finished difference Result 23249 states and 59286 transitions. [2021-06-05 03:59:20,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 03:59:20,029 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.0) internal successors, (65), 12 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 03:59:20,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:20,053 INFO L225 Difference]: With dead ends: 23249 [2021-06-05 03:59:20,053 INFO L226 Difference]: Without dead ends: 23218 [2021-06-05 03:59:20,053 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 157.6ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:59:20,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23218 states. [2021-06-05 03:59:20,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23218 to 21247. [2021-06-05 03:59:20,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21247 states, 21246 states have (on average 2.6115974771721735) internal successors, (55486), 21246 states have internal predecessors, (55486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:20,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21247 states to 21247 states and 55486 transitions. [2021-06-05 03:59:20,317 INFO L78 Accepts]: Start accepts. Automaton has 21247 states and 55486 transitions. Word has length 65 [2021-06-05 03:59:20,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:20,317 INFO L482 AbstractCegarLoop]: Abstraction has 21247 states and 55486 transitions. [2021-06-05 03:59:20,317 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.0) internal successors, (65), 12 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:20,317 INFO L276 IsEmpty]: Start isEmpty. Operand 21247 states and 55486 transitions. [2021-06-05 03:59:20,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 03:59:20,331 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:20,331 INFO L521 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:20,531 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 623 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1335 [2021-06-05 03:59:20,531 INFO L430 AbstractCegarLoop]: === Iteration 632 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:20,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:20,532 INFO L82 PathProgramCache]: Analyzing trace with hash -927414963, now seen corresponding path program 384 times [2021-06-05 03:59:20,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:20,532 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181116397] [2021-06-05 03:59:20,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:20,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:20,593 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 77 proven. 146 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 03:59:20,594 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:20,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181116397] [2021-06-05 03:59:20,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181116397] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:20,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37862235] [2021-06-05 03:59:20,594 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 624 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 624 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:20,627 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-06-05 03:59:20,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:59:20,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 03:59:20,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:20,711 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 77 proven. 146 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 03:59:20,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37862235] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:20,711 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:20,711 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 03:59:20,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366457470] [2021-06-05 03:59:20,711 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 03:59:20,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:20,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 03:59:20,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:59:20,711 INFO L87 Difference]: Start difference. First operand 21247 states and 55486 transitions. Second operand has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 11 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:20,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:20,893 INFO L93 Difference]: Finished difference Result 26072 states and 63936 transitions. [2021-06-05 03:59:20,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 03:59:20,893 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 11 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 03:59:20,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:20,921 INFO L225 Difference]: With dead ends: 26072 [2021-06-05 03:59:20,921 INFO L226 Difference]: Without dead ends: 26069 [2021-06-05 03:59:20,922 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 55.5ms TimeCoverageRelationStatistics Valid=67, Invalid=89, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:59:20,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26069 states. [2021-06-05 03:59:21,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26069 to 21233. [2021-06-05 03:59:21,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21233 states, 21232 states have (on average 2.610634890730972) internal successors, (55429), 21232 states have internal predecessors, (55429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:21,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21233 states to 21233 states and 55429 transitions. [2021-06-05 03:59:21,219 INFO L78 Accepts]: Start accepts. Automaton has 21233 states and 55429 transitions. Word has length 65 [2021-06-05 03:59:21,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:21,219 INFO L482 AbstractCegarLoop]: Abstraction has 21233 states and 55429 transitions. [2021-06-05 03:59:21,219 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 11 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:21,219 INFO L276 IsEmpty]: Start isEmpty. Operand 21233 states and 55429 transitions. [2021-06-05 03:59:21,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 03:59:21,320 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:21,320 INFO L521 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:21,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 624 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1336 [2021-06-05 03:59:21,520 INFO L430 AbstractCegarLoop]: === Iteration 633 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:21,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:21,521 INFO L82 PathProgramCache]: Analyzing trace with hash -720352397, now seen corresponding path program 385 times [2021-06-05 03:59:21,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:21,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981229191] [2021-06-05 03:59:21,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:21,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:21,589 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 70 proven. 153 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 03:59:21,589 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:21,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981229191] [2021-06-05 03:59:21,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981229191] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:21,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999316427] [2021-06-05 03:59:21,589 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 625 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 625 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:21,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:21,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 03:59:21,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:21,701 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 70 proven. 153 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 03:59:21,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999316427] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:21,702 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:21,702 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-06-05 03:59:21,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135319289] [2021-06-05 03:59:21,702 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 03:59:21,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:21,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 03:59:21,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:59:21,702 INFO L87 Difference]: Start difference. First operand 21233 states and 55429 transitions. Second operand has 13 states, 13 states have (on average 4.769230769230769) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:21,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:21,906 INFO L93 Difference]: Finished difference Result 26094 states and 63928 transitions. [2021-06-05 03:59:21,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 03:59:21,906 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.769230769230769) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 03:59:21,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:21,934 INFO L225 Difference]: With dead ends: 26094 [2021-06-05 03:59:21,934 INFO L226 Difference]: Without dead ends: 26076 [2021-06-05 03:59:21,934 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 76.4ms TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:59:21,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26076 states. [2021-06-05 03:59:22,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26076 to 21233. [2021-06-05 03:59:22,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21233 states, 21232 states have (on average 2.609410324039186) internal successors, (55403), 21232 states have internal predecessors, (55403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:22,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21233 states to 21233 states and 55403 transitions. [2021-06-05 03:59:22,235 INFO L78 Accepts]: Start accepts. Automaton has 21233 states and 55403 transitions. Word has length 65 [2021-06-05 03:59:22,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:22,235 INFO L482 AbstractCegarLoop]: Abstraction has 21233 states and 55403 transitions. [2021-06-05 03:59:22,235 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.769230769230769) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:22,235 INFO L276 IsEmpty]: Start isEmpty. Operand 21233 states and 55403 transitions. [2021-06-05 03:59:22,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 03:59:22,250 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:22,251 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:22,451 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1338,625 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:22,451 INFO L430 AbstractCegarLoop]: === Iteration 634 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:22,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:22,451 INFO L82 PathProgramCache]: Analyzing trace with hash 2126614886, now seen corresponding path program 386 times [2021-06-05 03:59:22,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:22,451 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378885183] [2021-06-05 03:59:22,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:22,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:22,541 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 22 proven. 201 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:59:22,541 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:22,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378885183] [2021-06-05 03:59:22,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378885183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:22,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105412807] [2021-06-05 03:59:22,541 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 626 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 626 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:22,569 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:59:22,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:59:22,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 03:59:22,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:22,664 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 17 proven. 206 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:59:22,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105412807] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:22,664 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:22,664 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 03:59:22,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059629221] [2021-06-05 03:59:22,664 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 03:59:22,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:22,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 03:59:22,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:59:22,664 INFO L87 Difference]: Start difference. First operand 21233 states and 55403 transitions. Second operand has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 12 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:23,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:23,508 INFO L93 Difference]: Finished difference Result 22551 states and 57719 transitions. [2021-06-05 03:59:23,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 03:59:23,508 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 12 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 03:59:23,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:23,532 INFO L225 Difference]: With dead ends: 22551 [2021-06-05 03:59:23,532 INFO L226 Difference]: Without dead ends: 22441 [2021-06-05 03:59:23,533 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 158.1ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:59:23,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22441 states. [2021-06-05 03:59:23,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22441 to 21246. [2021-06-05 03:59:23,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21246 states, 21245 states have (on average 2.604801129677571) internal successors, (55339), 21245 states have internal predecessors, (55339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:23,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21246 states to 21246 states and 55339 transitions. [2021-06-05 03:59:23,801 INFO L78 Accepts]: Start accepts. Automaton has 21246 states and 55339 transitions. Word has length 65 [2021-06-05 03:59:23,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:23,801 INFO L482 AbstractCegarLoop]: Abstraction has 21246 states and 55339 transitions. [2021-06-05 03:59:23,802 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 12 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:23,802 INFO L276 IsEmpty]: Start isEmpty. Operand 21246 states and 55339 transitions. [2021-06-05 03:59:23,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 03:59:23,816 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:23,816 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:24,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 626 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1341 [2021-06-05 03:59:24,016 INFO L430 AbstractCegarLoop]: === Iteration 635 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:24,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:24,016 INFO L82 PathProgramCache]: Analyzing trace with hash 1513078706, now seen corresponding path program 387 times [2021-06-05 03:59:24,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:24,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086649315] [2021-06-05 03:59:24,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:24,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:24,113 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 19 proven. 202 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 03:59:24,113 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:24,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086649315] [2021-06-05 03:59:24,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086649315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:24,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230997590] [2021-06-05 03:59:24,114 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 627 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 627 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:24,148 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2021-06-05 03:59:24,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:59:24,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 03:59:24,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:24,232 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 203 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 03:59:24,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230997590] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:24,233 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:24,233 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 03:59:24,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314189500] [2021-06-05 03:59:24,233 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 03:59:24,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:24,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 03:59:24,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:59:24,233 INFO L87 Difference]: Start difference. First operand 21246 states and 55339 transitions. Second operand has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:24,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:24,857 INFO L93 Difference]: Finished difference Result 23355 states and 59455 transitions. [2021-06-05 03:59:24,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 03:59:24,857 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 03:59:24,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:24,882 INFO L225 Difference]: With dead ends: 23355 [2021-06-05 03:59:24,882 INFO L226 Difference]: Without dead ends: 23343 [2021-06-05 03:59:24,883 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 157.3ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:59:24,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23343 states. [2021-06-05 03:59:25,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23343 to 21366. [2021-06-05 03:59:25,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21366 states, 21365 states have (on average 2.604165691551603) internal successors, (55638), 21365 states have internal predecessors, (55638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:25,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21366 states to 21366 states and 55638 transitions. [2021-06-05 03:59:25,169 INFO L78 Accepts]: Start accepts. Automaton has 21366 states and 55638 transitions. Word has length 65 [2021-06-05 03:59:25,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:25,169 INFO L482 AbstractCegarLoop]: Abstraction has 21366 states and 55638 transitions. [2021-06-05 03:59:25,169 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:25,169 INFO L276 IsEmpty]: Start isEmpty. Operand 21366 states and 55638 transitions. [2021-06-05 03:59:25,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 03:59:25,184 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:25,184 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:25,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 627 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1342 [2021-06-05 03:59:25,384 INFO L430 AbstractCegarLoop]: === Iteration 636 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:25,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:25,385 INFO L82 PathProgramCache]: Analyzing trace with hash -639971256, now seen corresponding path program 388 times [2021-06-05 03:59:25,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:25,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289333188] [2021-06-05 03:59:25,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:25,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:25,489 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 19 proven. 204 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:59:25,489 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:25,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289333188] [2021-06-05 03:59:25,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289333188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:25,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977135676] [2021-06-05 03:59:25,489 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 628 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 628 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:25,519 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:59:25,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:59:25,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 03:59:25,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:25,606 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 205 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:59:25,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977135676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:25,606 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:25,606 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 03:59:25,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067922005] [2021-06-05 03:59:25,606 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:59:25,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:25,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:59:25,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:59:25,607 INFO L87 Difference]: Start difference. First operand 21366 states and 55638 transitions. Second operand has 14 states, 14 states have (on average 4.642857142857143) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:26,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:26,482 INFO L93 Difference]: Finished difference Result 25787 states and 64793 transitions. [2021-06-05 03:59:26,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 03:59:26,482 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.642857142857143) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 03:59:26,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:26,512 INFO L225 Difference]: With dead ends: 25787 [2021-06-05 03:59:26,512 INFO L226 Difference]: Without dead ends: 25733 [2021-06-05 03:59:26,512 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 70 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 266.0ms TimeCoverageRelationStatistics Valid=123, Invalid=933, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 03:59:26,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25733 states. [2021-06-05 03:59:26,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25733 to 21713. [2021-06-05 03:59:26,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21713 states, 21712 states have (on average 2.6057479734708915) internal successors, (56576), 21712 states have internal predecessors, (56576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:26,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21713 states to 21713 states and 56576 transitions. [2021-06-05 03:59:26,821 INFO L78 Accepts]: Start accepts. Automaton has 21713 states and 56576 transitions. Word has length 65 [2021-06-05 03:59:26,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:26,821 INFO L482 AbstractCegarLoop]: Abstraction has 21713 states and 56576 transitions. [2021-06-05 03:59:26,821 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.642857142857143) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:26,821 INFO L276 IsEmpty]: Start isEmpty. Operand 21713 states and 56576 transitions. [2021-06-05 03:59:26,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 03:59:26,836 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:26,837 INFO L521 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:27,037 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 628 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1343 [2021-06-05 03:59:27,037 INFO L430 AbstractCegarLoop]: === Iteration 637 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:27,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:27,037 INFO L82 PathProgramCache]: Analyzing trace with hash 892587853, now seen corresponding path program 389 times [2021-06-05 03:59:27,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:27,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280339416] [2021-06-05 03:59:27,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:27,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:27,114 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 59 proven. 167 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:59:27,114 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:27,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280339416] [2021-06-05 03:59:27,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280339416] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:27,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009120139] [2021-06-05 03:59:27,114 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 629 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 629 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:27,146 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-06-05 03:59:27,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:59:27,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 03:59:27,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:27,270 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 59 proven. 167 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:59:27,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009120139] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:27,271 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:27,271 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 17 [2021-06-05 03:59:27,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055507162] [2021-06-05 03:59:27,271 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 03:59:27,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:27,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 03:59:27,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-06-05 03:59:27,271 INFO L87 Difference]: Start difference. First operand 21713 states and 56576 transitions. Second operand has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 17 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:27,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:27,619 INFO L93 Difference]: Finished difference Result 26779 states and 65477 transitions. [2021-06-05 03:59:27,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 03:59:27,619 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 17 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 03:59:27,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:27,649 INFO L225 Difference]: With dead ends: 26779 [2021-06-05 03:59:27,649 INFO L226 Difference]: Without dead ends: 26755 [2021-06-05 03:59:27,649 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 111.5ms TimeCoverageRelationStatistics Valid=123, Invalid=297, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:59:27,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26755 states. [2021-06-05 03:59:27,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26755 to 21713. [2021-06-05 03:59:27,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21713 states, 21712 states have (on average 2.604918938835667) internal successors, (56558), 21712 states have internal predecessors, (56558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:27,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21713 states to 21713 states and 56558 transitions. [2021-06-05 03:59:27,947 INFO L78 Accepts]: Start accepts. Automaton has 21713 states and 56558 transitions. Word has length 65 [2021-06-05 03:59:27,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:27,947 INFO L482 AbstractCegarLoop]: Abstraction has 21713 states and 56558 transitions. [2021-06-05 03:59:27,947 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 17 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:27,947 INFO L276 IsEmpty]: Start isEmpty. Operand 21713 states and 56558 transitions. [2021-06-05 03:59:27,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 03:59:27,962 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:27,962 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:28,162 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1344,629 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:28,162 INFO L430 AbstractCegarLoop]: === Iteration 638 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:28,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:28,162 INFO L82 PathProgramCache]: Analyzing trace with hash -485134722, now seen corresponding path program 390 times [2021-06-05 03:59:28,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:28,162 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074213684] [2021-06-05 03:59:28,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:28,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:28,270 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 19 proven. 204 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:59:28,270 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:28,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074213684] [2021-06-05 03:59:28,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074213684] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:28,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615151730] [2021-06-05 03:59:28,270 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 630 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 630 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:28,305 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2021-06-05 03:59:28,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:59:28,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 03:59:28,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:28,390 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 205 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:59:28,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615151730] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:28,390 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:28,390 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 03:59:28,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150241059] [2021-06-05 03:59:28,391 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 03:59:28,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:28,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 03:59:28,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:59:28,391 INFO L87 Difference]: Start difference. First operand 21713 states and 56558 transitions. Second operand has 15 states, 15 states have (on average 4.333333333333333) internal successors, (65), 14 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:29,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:29,585 INFO L93 Difference]: Finished difference Result 30965 states and 76348 transitions. [2021-06-05 03:59:29,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 03:59:29,585 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.333333333333333) internal successors, (65), 14 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 03:59:29,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:29,620 INFO L225 Difference]: With dead ends: 30965 [2021-06-05 03:59:29,620 INFO L226 Difference]: Without dead ends: 30797 [2021-06-05 03:59:29,620 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 69 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 472.5ms TimeCoverageRelationStatistics Valid=285, Invalid=2471, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 03:59:29,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30797 states. [2021-06-05 03:59:29,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30797 to 22408. [2021-06-05 03:59:29,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22408 states, 22407 states have (on average 2.60543580131209) internal successors, (58380), 22407 states have internal predecessors, (58380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:29,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22408 states to 22408 states and 58380 transitions. [2021-06-05 03:59:29,953 INFO L78 Accepts]: Start accepts. Automaton has 22408 states and 58380 transitions. Word has length 65 [2021-06-05 03:59:29,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:29,953 INFO L482 AbstractCegarLoop]: Abstraction has 22408 states and 58380 transitions. [2021-06-05 03:59:29,953 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.333333333333333) internal successors, (65), 14 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:29,953 INFO L276 IsEmpty]: Start isEmpty. Operand 22408 states and 58380 transitions. [2021-06-05 03:59:29,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 03:59:29,968 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:29,968 INFO L521 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:30,168 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1348,630 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:30,168 INFO L430 AbstractCegarLoop]: === Iteration 639 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:30,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:30,168 INFO L82 PathProgramCache]: Analyzing trace with hash -98532045, now seen corresponding path program 391 times [2021-06-05 03:59:30,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:30,168 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70454650] [2021-06-05 03:59:30,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:30,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:30,340 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 54 proven. 172 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:59:30,340 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:30,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70454650] [2021-06-05 03:59:30,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70454650] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:30,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030854609] [2021-06-05 03:59:30,340 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 631 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 631 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:30,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:30,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 03:59:30,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:30,452 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 54 proven. 172 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:59:30,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030854609] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:30,452 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:30,452 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-06-05 03:59:30,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723776794] [2021-06-05 03:59:30,452 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 03:59:30,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:30,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 03:59:30,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:59:30,453 INFO L87 Difference]: Start difference. First operand 22408 states and 58380 transitions. Second operand has 15 states, 15 states have (on average 4.266666666666667) internal successors, (64), 14 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:30,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:30,711 INFO L93 Difference]: Finished difference Result 27475 states and 67252 transitions. [2021-06-05 03:59:30,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 03:59:30,711 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.266666666666667) internal successors, (64), 14 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 03:59:30,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:30,741 INFO L225 Difference]: With dead ends: 27475 [2021-06-05 03:59:30,741 INFO L226 Difference]: Without dead ends: 27442 [2021-06-05 03:59:30,742 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 188.2ms TimeCoverageRelationStatistics Valid=114, Invalid=228, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:59:30,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27442 states. [2021-06-05 03:59:30,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27442 to 22408. [2021-06-05 03:59:31,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22408 states, 22407 states have (on average 2.605034141116615) internal successors, (58371), 22407 states have internal predecessors, (58371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:31,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22408 states to 22408 states and 58371 transitions. [2021-06-05 03:59:31,054 INFO L78 Accepts]: Start accepts. Automaton has 22408 states and 58371 transitions. Word has length 65 [2021-06-05 03:59:31,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:31,054 INFO L482 AbstractCegarLoop]: Abstraction has 22408 states and 58371 transitions. [2021-06-05 03:59:31,054 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.266666666666667) internal successors, (64), 14 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:31,054 INFO L276 IsEmpty]: Start isEmpty. Operand 22408 states and 58371 transitions. [2021-06-05 03:59:31,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 03:59:31,068 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:31,068 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:31,268 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 631 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1349 [2021-06-05 03:59:31,268 INFO L430 AbstractCegarLoop]: === Iteration 640 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:31,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:31,269 INFO L82 PathProgramCache]: Analyzing trace with hash -544826232, now seen corresponding path program 392 times [2021-06-05 03:59:31,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:31,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860696218] [2021-06-05 03:59:31,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:31,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:31,391 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 19 proven. 204 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:59:31,391 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:31,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860696218] [2021-06-05 03:59:31,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860696218] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:31,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713619703] [2021-06-05 03:59:31,392 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 632 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 632 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:31,420 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:59:31,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:59:31,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 03:59:31,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:31,505 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 205 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:59:31,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713619703] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:31,506 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:31,506 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 03:59:31,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376698928] [2021-06-05 03:59:31,506 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:59:31,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:31,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:59:31,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:59:31,507 INFO L87 Difference]: Start difference. First operand 22408 states and 58371 transitions. Second operand has 16 states, 16 states have (on average 4.0625) internal successors, (65), 15 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:33,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:33,255 INFO L93 Difference]: Finished difference Result 41984 states and 101118 transitions. [2021-06-05 03:59:33,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-06-05 03:59:33,256 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.0625) internal successors, (65), 15 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 03:59:33,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:33,304 INFO L225 Difference]: With dead ends: 41984 [2021-06-05 03:59:33,305 INFO L226 Difference]: Without dead ends: 41462 [2021-06-05 03:59:33,305 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2412 ImplicationChecksByTransitivity, 888.4ms TimeCoverageRelationStatistics Valid=663, Invalid=6477, Unknown=0, NotChecked=0, Total=7140 [2021-06-05 03:59:33,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41462 states. [2021-06-05 03:59:33,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41462 to 23564. [2021-06-05 03:59:33,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23564 states, 23563 states have (on average 2.604252429656665) internal successors, (61364), 23563 states have internal predecessors, (61364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:33,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23564 states to 23564 states and 61364 transitions. [2021-06-05 03:59:33,726 INFO L78 Accepts]: Start accepts. Automaton has 23564 states and 61364 transitions. Word has length 65 [2021-06-05 03:59:33,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:33,726 INFO L482 AbstractCegarLoop]: Abstraction has 23564 states and 61364 transitions. [2021-06-05 03:59:33,726 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.0625) internal successors, (65), 15 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:33,727 INFO L276 IsEmpty]: Start isEmpty. Operand 23564 states and 61364 transitions. [2021-06-05 03:59:33,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 03:59:33,741 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:33,741 INFO L521 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:33,941 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 632 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1354 [2021-06-05 03:59:33,941 INFO L430 AbstractCegarLoop]: === Iteration 641 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:33,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:33,942 INFO L82 PathProgramCache]: Analyzing trace with hash 1348746637, now seen corresponding path program 393 times [2021-06-05 03:59:33,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:33,942 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63183914] [2021-06-05 03:59:33,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:33,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:34,038 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 55 proven. 171 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:59:34,038 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:34,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63183914] [2021-06-05 03:59:34,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63183914] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:34,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799133612] [2021-06-05 03:59:34,038 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 633 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 633 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:34,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-06-05 03:59:34,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:59:34,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 03:59:34,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:34,158 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 55 proven. 171 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:59:34,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799133612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:34,158 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:34,158 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-06-05 03:59:34,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557277760] [2021-06-05 03:59:34,158 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:59:34,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:34,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:59:34,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:59:34,158 INFO L87 Difference]: Start difference. First operand 23564 states and 61364 transitions. Second operand has 16 states, 16 states have (on average 4.0) internal successors, (64), 15 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:34,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:34,420 INFO L93 Difference]: Finished difference Result 28863 states and 70675 transitions. [2021-06-05 03:59:34,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 03:59:34,420 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.0) internal successors, (64), 15 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 03:59:34,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:34,453 INFO L225 Difference]: With dead ends: 28863 [2021-06-05 03:59:34,454 INFO L226 Difference]: Without dead ends: 28821 [2021-06-05 03:59:34,454 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 122.3ms TimeCoverageRelationStatistics Valid=134, Invalid=286, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:59:34,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28821 states. [2021-06-05 03:59:34,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28821 to 23564. [2021-06-05 03:59:34,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23564 states, 23563 states have (on average 2.6038704748970845) internal successors, (61355), 23563 states have internal predecessors, (61355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:34,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23564 states to 23564 states and 61355 transitions. [2021-06-05 03:59:34,831 INFO L78 Accepts]: Start accepts. Automaton has 23564 states and 61355 transitions. Word has length 65 [2021-06-05 03:59:34,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:34,831 INFO L482 AbstractCegarLoop]: Abstraction has 23564 states and 61355 transitions. [2021-06-05 03:59:34,831 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.0) internal successors, (64), 15 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:34,831 INFO L276 IsEmpty]: Start isEmpty. Operand 23564 states and 61355 transitions. [2021-06-05 03:59:34,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 03:59:34,846 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:34,846 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:35,046 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 633 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1355 [2021-06-05 03:59:35,047 INFO L430 AbstractCegarLoop]: === Iteration 642 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:35,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:35,047 INFO L82 PathProgramCache]: Analyzing trace with hash -698140098, now seen corresponding path program 394 times [2021-06-05 03:59:35,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:35,047 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059173270] [2021-06-05 03:59:35,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:35,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:35,185 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 19 proven. 204 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:59:35,185 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:35,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059173270] [2021-06-05 03:59:35,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059173270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:35,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690669927] [2021-06-05 03:59:35,186 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 634 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 634 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:35,214 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:59:35,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:59:35,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 03:59:35,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:35,300 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 205 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:59:35,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690669927] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:35,300 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:35,300 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-06-05 03:59:35,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314917303] [2021-06-05 03:59:35,300 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 03:59:35,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:35,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 03:59:35,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:59:35,301 INFO L87 Difference]: Start difference. First operand 23564 states and 61355 transitions. Second operand has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 16 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:37,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:37,811 INFO L93 Difference]: Finished difference Result 53425 states and 127611 transitions. [2021-06-05 03:59:37,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2021-06-05 03:59:37,812 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 16 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 03:59:37,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:37,879 INFO L225 Difference]: With dead ends: 53425 [2021-06-05 03:59:37,879 INFO L226 Difference]: Without dead ends: 52807 [2021-06-05 03:59:37,880 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6795 ImplicationChecksByTransitivity, 1607.9ms TimeCoverageRelationStatistics Valid=1473, Invalid=16083, Unknown=0, NotChecked=0, Total=17556 [2021-06-05 03:59:37,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52807 states. [2021-06-05 03:59:38,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52807 to 24483. [2021-06-05 03:59:38,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24483 states, 24482 states have (on average 2.6029327669308064) internal successors, (63725), 24482 states have internal predecessors, (63725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:38,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24483 states to 24483 states and 63725 transitions. [2021-06-05 03:59:38,366 INFO L78 Accepts]: Start accepts. Automaton has 24483 states and 63725 transitions. Word has length 65 [2021-06-05 03:59:38,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:38,367 INFO L482 AbstractCegarLoop]: Abstraction has 24483 states and 63725 transitions. [2021-06-05 03:59:38,367 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 16 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:38,367 INFO L276 IsEmpty]: Start isEmpty. Operand 24483 states and 63725 transitions. [2021-06-05 03:59:38,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 03:59:38,382 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:38,382 INFO L521 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:38,582 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1361,634 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:38,582 INFO L430 AbstractCegarLoop]: === Iteration 643 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:38,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:38,583 INFO L82 PathProgramCache]: Analyzing trace with hash 51277555, now seen corresponding path program 395 times [2021-06-05 03:59:38,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:38,583 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564359964] [2021-06-05 03:59:38,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:38,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:38,689 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 62 proven. 164 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:59:38,689 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:38,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564359964] [2021-06-05 03:59:38,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564359964] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:38,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778249600] [2021-06-05 03:59:38,690 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 635 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 635 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:38,720 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-05 03:59:38,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:59:38,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 03:59:38,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:38,838 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 62 proven. 164 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:59:38,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778249600] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:38,839 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:38,839 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 20 [2021-06-05 03:59:38,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038447544] [2021-06-05 03:59:38,839 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 03:59:38,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:38,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 03:59:38,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:59:38,839 INFO L87 Difference]: Start difference. First operand 24483 states and 63725 transitions. Second operand has 21 states, 21 states have (on average 4.190476190476191) internal successors, (88), 20 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:39,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:39,207 INFO L93 Difference]: Finished difference Result 30034 states and 73553 transitions. [2021-06-05 03:59:39,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 03:59:39,207 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.190476190476191) internal successors, (88), 20 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 03:59:39,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:39,242 INFO L225 Difference]: With dead ends: 30034 [2021-06-05 03:59:39,243 INFO L226 Difference]: Without dead ends: 29983 [2021-06-05 03:59:39,243 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 176.5ms TimeCoverageRelationStatistics Valid=183, Invalid=519, Unknown=0, NotChecked=0, Total=702 [2021-06-05 03:59:39,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29983 states. [2021-06-05 03:59:39,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29983 to 24023. [2021-06-05 03:59:39,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24023 states, 24022 states have (on average 2.59903421863292) internal successors, (62434), 24022 states have internal predecessors, (62434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:39,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24023 states to 24023 states and 62434 transitions. [2021-06-05 03:59:39,609 INFO L78 Accepts]: Start accepts. Automaton has 24023 states and 62434 transitions. Word has length 65 [2021-06-05 03:59:39,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:39,610 INFO L482 AbstractCegarLoop]: Abstraction has 24023 states and 62434 transitions. [2021-06-05 03:59:39,610 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 4.190476190476191) internal successors, (88), 20 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:39,610 INFO L276 IsEmpty]: Start isEmpty. Operand 24023 states and 62434 transitions. [2021-06-05 03:59:39,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 03:59:39,625 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:39,625 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:39,825 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1362,635 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:39,825 INFO L430 AbstractCegarLoop]: === Iteration 644 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:39,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:39,826 INFO L82 PathProgramCache]: Analyzing trace with hash 1773680840, now seen corresponding path program 396 times [2021-06-05 03:59:39,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:39,826 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526575508] [2021-06-05 03:59:39,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:39,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:39,977 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 207 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:59:39,977 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:39,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526575508] [2021-06-05 03:59:39,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526575508] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:39,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146942318] [2021-06-05 03:59:39,978 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 636 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 636 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:40,013 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-06-05 03:59:40,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:59:40,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 03:59:40,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:40,097 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 207 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:59:40,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146942318] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:40,098 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:40,098 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2021-06-05 03:59:40,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640422501] [2021-06-05 03:59:40,098 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 03:59:40,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:40,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 03:59:40,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2021-06-05 03:59:40,098 INFO L87 Difference]: Start difference. First operand 24023 states and 62434 transitions. Second operand has 18 states, 18 states have (on average 3.6666666666666665) internal successors, (66), 17 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:41,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:41,105 INFO L93 Difference]: Finished difference Result 34769 states and 84689 transitions. [2021-06-05 03:59:41,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 03:59:41,105 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.6666666666666665) internal successors, (66), 17 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 03:59:41,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:41,144 INFO L225 Difference]: With dead ends: 34769 [2021-06-05 03:59:41,144 INFO L226 Difference]: Without dead ends: 33929 [2021-06-05 03:59:41,144 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 66 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 377.2ms TimeCoverageRelationStatistics Valid=187, Invalid=1145, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 03:59:41,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33929 states. [2021-06-05 03:59:41,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33929 to 20717. [2021-06-05 03:59:41,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20717 states, 20716 states have (on average 2.5939370534852286) internal successors, (53736), 20716 states have internal predecessors, (53736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:41,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20717 states to 20717 states and 53736 transitions. [2021-06-05 03:59:41,456 INFO L78 Accepts]: Start accepts. Automaton has 20717 states and 53736 transitions. Word has length 65 [2021-06-05 03:59:41,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:41,456 INFO L482 AbstractCegarLoop]: Abstraction has 20717 states and 53736 transitions. [2021-06-05 03:59:41,456 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.6666666666666665) internal successors, (66), 17 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:41,456 INFO L276 IsEmpty]: Start isEmpty. Operand 20717 states and 53736 transitions. [2021-06-05 03:59:41,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 03:59:41,470 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:41,470 INFO L521 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:41,670 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 636 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1369 [2021-06-05 03:59:41,670 INFO L430 AbstractCegarLoop]: === Iteration 645 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:41,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:41,671 INFO L82 PathProgramCache]: Analyzing trace with hash 1535619323, now seen corresponding path program 190 times [2021-06-05 03:59:41,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:41,671 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524300106] [2021-06-05 03:59:41,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:41,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:41,739 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 175 proven. 52 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:59:41,740 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:41,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524300106] [2021-06-05 03:59:41,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524300106] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:41,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023742920] [2021-06-05 03:59:41,740 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 637 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 637 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:41,767 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:59:41,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:59:41,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 03:59:41,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:41,853 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 176 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:41,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023742920] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:41,853 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:41,853 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2021-06-05 03:59:41,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27386765] [2021-06-05 03:59:41,854 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:59:41,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:41,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:59:41,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=105, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:59:41,854 INFO L87 Difference]: Start difference. First operand 20717 states and 53736 transitions. Second operand has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:42,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:42,100 INFO L93 Difference]: Finished difference Result 25901 states and 64415 transitions. [2021-06-05 03:59:42,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 03:59:42,100 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 03:59:42,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:42,130 INFO L225 Difference]: With dead ends: 25901 [2021-06-05 03:59:42,130 INFO L226 Difference]: Without dead ends: 25881 [2021-06-05 03:59:42,131 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 73.9ms TimeCoverageRelationStatistics Valid=97, Invalid=143, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:59:42,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25881 states. [2021-06-05 03:59:42,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25881 to 21398. [2021-06-05 03:59:42,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21398 states, 21397 states have (on average 2.5984951161377765) internal successors, (55600), 21397 states have internal predecessors, (55600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:42,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21398 states to 21398 states and 55600 transitions. [2021-06-05 03:59:42,454 INFO L78 Accepts]: Start accepts. Automaton has 21398 states and 55600 transitions. Word has length 65 [2021-06-05 03:59:42,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:42,454 INFO L482 AbstractCegarLoop]: Abstraction has 21398 states and 55600 transitions. [2021-06-05 03:59:42,454 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:42,454 INFO L276 IsEmpty]: Start isEmpty. Operand 21398 states and 55600 transitions. [2021-06-05 03:59:42,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 03:59:42,468 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:42,468 INFO L521 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:42,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1370,637 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:42,668 INFO L430 AbstractCegarLoop]: === Iteration 646 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:42,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:42,668 INFO L82 PathProgramCache]: Analyzing trace with hash 913738913, now seen corresponding path program 191 times [2021-06-05 03:59:42,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:42,668 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128810135] [2021-06-05 03:59:42,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:42,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:42,738 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 175 proven. 51 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:59:42,738 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:42,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128810135] [2021-06-05 03:59:42,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128810135] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:42,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870035351] [2021-06-05 03:59:42,738 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 638 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 638 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:42,774 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2021-06-05 03:59:42,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:59:42,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 03:59:42,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:42,964 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 177 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:42,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870035351] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:42,964 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:42,964 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 22] total 24 [2021-06-05 03:59:42,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069265506] [2021-06-05 03:59:42,964 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 03:59:42,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:42,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 03:59:42,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=365, Unknown=0, NotChecked=0, Total=600 [2021-06-05 03:59:42,965 INFO L87 Difference]: Start difference. First operand 21398 states and 55600 transitions. Second operand has 25 states, 25 states have (on average 3.84) internal successors, (96), 24 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:43,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:43,678 INFO L93 Difference]: Finished difference Result 34523 states and 84310 transitions. [2021-06-05 03:59:43,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 03:59:43,679 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.84) internal successors, (96), 24 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 03:59:43,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:43,709 INFO L225 Difference]: With dead ends: 34523 [2021-06-05 03:59:43,710 INFO L226 Difference]: Without dead ends: 34523 [2021-06-05 03:59:43,710 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 346.6ms TimeCoverageRelationStatistics Valid=591, Invalid=891, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 03:59:43,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34523 states. [2021-06-05 03:59:43,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34523 to 21413. [2021-06-05 03:59:44,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21413 states, 21412 states have (on average 2.5987763870726694) internal successors, (55645), 21412 states have internal predecessors, (55645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:44,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21413 states to 21413 states and 55645 transitions. [2021-06-05 03:59:44,043 INFO L78 Accepts]: Start accepts. Automaton has 21413 states and 55645 transitions. Word has length 65 [2021-06-05 03:59:44,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:44,043 INFO L482 AbstractCegarLoop]: Abstraction has 21413 states and 55645 transitions. [2021-06-05 03:59:44,043 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 3.84) internal successors, (96), 24 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:44,043 INFO L276 IsEmpty]: Start isEmpty. Operand 21413 states and 55645 transitions. [2021-06-05 03:59:44,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 03:59:44,058 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:44,058 INFO L521 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:44,258 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1372,638 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:44,258 INFO L430 AbstractCegarLoop]: === Iteration 647 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:44,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:44,258 INFO L82 PathProgramCache]: Analyzing trace with hash -723833543, now seen corresponding path program 192 times [2021-06-05 03:59:44,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:44,258 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574432434] [2021-06-05 03:59:44,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:44,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:44,337 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 173 proven. 53 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:59:44,338 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:44,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574432434] [2021-06-05 03:59:44,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574432434] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:44,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632071876] [2021-06-05 03:59:44,338 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 639 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 639 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:44,372 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2021-06-05 03:59:44,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:59:44,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 03:59:44,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:44,464 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 174 proven. 53 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:59:44,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632071876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:44,464 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:44,464 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 14 [2021-06-05 03:59:44,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133614247] [2021-06-05 03:59:44,464 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 03:59:44,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:44,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 03:59:44,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=130, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:59:44,465 INFO L87 Difference]: Start difference. First operand 21413 states and 55645 transitions. Second operand has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:44,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:44,852 INFO L93 Difference]: Finished difference Result 36708 states and 89413 transitions. [2021-06-05 03:59:44,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 03:59:44,852 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 03:59:44,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:44,892 INFO L225 Difference]: With dead ends: 36708 [2021-06-05 03:59:44,892 INFO L226 Difference]: Without dead ends: 36708 [2021-06-05 03:59:44,892 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 157.3ms TimeCoverageRelationStatistics Valid=259, Invalid=391, Unknown=0, NotChecked=0, Total=650 [2021-06-05 03:59:44,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36708 states. [2021-06-05 03:59:45,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36708 to 21464. [2021-06-05 03:59:45,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21464 states, 21463 states have (on average 2.600288869216792) internal successors, (55810), 21463 states have internal predecessors, (55810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:45,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21464 states to 21464 states and 55810 transitions. [2021-06-05 03:59:45,250 INFO L78 Accepts]: Start accepts. Automaton has 21464 states and 55810 transitions. Word has length 65 [2021-06-05 03:59:45,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:45,250 INFO L482 AbstractCegarLoop]: Abstraction has 21464 states and 55810 transitions. [2021-06-05 03:59:45,250 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:45,251 INFO L276 IsEmpty]: Start isEmpty. Operand 21464 states and 55810 transitions. [2021-06-05 03:59:45,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 03:59:45,266 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:45,266 INFO L521 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:45,466 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1373,639 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:45,466 INFO L430 AbstractCegarLoop]: === Iteration 648 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:45,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:45,467 INFO L82 PathProgramCache]: Analyzing trace with hash 1881138589, now seen corresponding path program 193 times [2021-06-05 03:59:45,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:45,467 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418616741] [2021-06-05 03:59:45,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:45,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:45,554 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 163 proven. 63 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:59:45,554 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:45,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418616741] [2021-06-05 03:59:45,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418616741] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:45,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599811238] [2021-06-05 03:59:45,555 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 640 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 640 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:45,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:45,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 03:59:45,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:45,674 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 164 proven. 63 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:59:45,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599811238] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:45,675 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:45,675 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 15 [2021-06-05 03:59:45,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595842243] [2021-06-05 03:59:45,675 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:59:45,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:45,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:59:45,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:59:45,675 INFO L87 Difference]: Start difference. First operand 21464 states and 55810 transitions. Second operand has 16 states, 16 states have (on average 4.3125) internal successors, (69), 15 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:46,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:46,096 INFO L93 Difference]: Finished difference Result 37797 states and 91974 transitions. [2021-06-05 03:59:46,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 03:59:46,097 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.3125) internal successors, (69), 15 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 03:59:46,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:46,138 INFO L225 Difference]: With dead ends: 37797 [2021-06-05 03:59:46,138 INFO L226 Difference]: Without dead ends: 37797 [2021-06-05 03:59:46,138 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 195.8ms TimeCoverageRelationStatistics Valid=338, Invalid=532, Unknown=0, NotChecked=0, Total=870 [2021-06-05 03:59:46,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37797 states. [2021-06-05 03:59:46,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37797 to 21524. [2021-06-05 03:59:46,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21524 states, 21523 states have (on average 2.601960693211913) internal successors, (56002), 21523 states have internal predecessors, (56002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:46,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21524 states to 21524 states and 56002 transitions. [2021-06-05 03:59:46,498 INFO L78 Accepts]: Start accepts. Automaton has 21524 states and 56002 transitions. Word has length 65 [2021-06-05 03:59:46,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:46,498 INFO L482 AbstractCegarLoop]: Abstraction has 21524 states and 56002 transitions. [2021-06-05 03:59:46,498 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.3125) internal successors, (69), 15 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:46,498 INFO L276 IsEmpty]: Start isEmpty. Operand 21524 states and 56002 transitions. [2021-06-05 03:59:46,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 03:59:46,512 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:46,512 INFO L521 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:46,713 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 640 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1374 [2021-06-05 03:59:46,713 INFO L430 AbstractCegarLoop]: === Iteration 649 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:46,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:46,713 INFO L82 PathProgramCache]: Analyzing trace with hash 841851577, now seen corresponding path program 194 times [2021-06-05 03:59:46,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:46,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929434067] [2021-06-05 03:59:46,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:46,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:46,814 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 153 proven. 73 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:59:46,814 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:46,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929434067] [2021-06-05 03:59:46,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929434067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:46,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362327474] [2021-06-05 03:59:46,814 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 641 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 641 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:46,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:59:46,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:59:46,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 03:59:46,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:46,936 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 154 proven. 73 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:59:46,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362327474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:46,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:46,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 16 [2021-06-05 03:59:46,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075048444] [2021-06-05 03:59:46,936 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 03:59:46,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:46,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 03:59:46,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:59:46,936 INFO L87 Difference]: Start difference. First operand 21524 states and 56002 transitions. Second operand has 17 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 16 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:47,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:47,397 INFO L93 Difference]: Finished difference Result 36105 states and 88048 transitions. [2021-06-05 03:59:47,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 03:59:47,397 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 16 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 03:59:47,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:47,437 INFO L225 Difference]: With dead ends: 36105 [2021-06-05 03:59:47,437 INFO L226 Difference]: Without dead ends: 36105 [2021-06-05 03:59:47,438 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 224.0ms TimeCoverageRelationStatistics Valid=381, Invalid=611, Unknown=0, NotChecked=0, Total=992 [2021-06-05 03:59:47,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36105 states. [2021-06-05 03:59:47,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36105 to 21553. [2021-06-05 03:59:47,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21553 states, 21552 states have (on average 2.6023106904231628) internal successors, (56085), 21552 states have internal predecessors, (56085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:47,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21553 states to 21553 states and 56085 transitions. [2021-06-05 03:59:47,811 INFO L78 Accepts]: Start accepts. Automaton has 21553 states and 56085 transitions. Word has length 65 [2021-06-05 03:59:47,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:47,811 INFO L482 AbstractCegarLoop]: Abstraction has 21553 states and 56085 transitions. [2021-06-05 03:59:47,811 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 16 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:47,811 INFO L276 IsEmpty]: Start isEmpty. Operand 21553 states and 56085 transitions. [2021-06-05 03:59:47,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 03:59:47,825 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:47,825 INFO L521 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:48,025 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 641 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1375 [2021-06-05 03:59:48,026 INFO L430 AbstractCegarLoop]: === Iteration 650 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:48,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:48,026 INFO L82 PathProgramCache]: Analyzing trace with hash 1861713949, now seen corresponding path program 195 times [2021-06-05 03:59:48,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:48,026 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974185645] [2021-06-05 03:59:48,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:48,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:48,137 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 143 proven. 83 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:59:48,137 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:48,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974185645] [2021-06-05 03:59:48,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974185645] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:48,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543516960] [2021-06-05 03:59:48,138 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 642 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 642 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:48,172 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2021-06-05 03:59:48,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:59:48,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 03:59:48,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:48,327 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 184 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:59:48,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543516960] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:48,327 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:48,327 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 22 [2021-06-05 03:59:48,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227517898] [2021-06-05 03:59:48,327 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 03:59:48,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:48,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 03:59:48,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=336, Unknown=0, NotChecked=0, Total=506 [2021-06-05 03:59:48,328 INFO L87 Difference]: Start difference. First operand 21553 states and 56085 transitions. Second operand has 23 states, 23 states have (on average 3.5217391304347827) internal successors, (81), 22 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:48,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:48,763 INFO L93 Difference]: Finished difference Result 25993 states and 64689 transitions. [2021-06-05 03:59:48,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 03:59:48,763 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.5217391304347827) internal successors, (81), 22 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 03:59:48,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:48,793 INFO L225 Difference]: With dead ends: 25993 [2021-06-05 03:59:48,794 INFO L226 Difference]: Without dead ends: 25993 [2021-06-05 03:59:48,794 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 228.1ms TimeCoverageRelationStatistics Valid=288, Invalid=524, Unknown=0, NotChecked=0, Total=812 [2021-06-05 03:59:48,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25993 states. [2021-06-05 03:59:49,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25993 to 20708. [2021-06-05 03:59:49,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20708 states, 20707 states have (on average 2.595257642343169) internal successors, (53740), 20707 states have internal predecessors, (53740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:49,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20708 states to 20708 states and 53740 transitions. [2021-06-05 03:59:49,084 INFO L78 Accepts]: Start accepts. Automaton has 20708 states and 53740 transitions. Word has length 65 [2021-06-05 03:59:49,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:49,084 INFO L482 AbstractCegarLoop]: Abstraction has 20708 states and 53740 transitions. [2021-06-05 03:59:49,084 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 3.5217391304347827) internal successors, (81), 22 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:49,084 INFO L276 IsEmpty]: Start isEmpty. Operand 20708 states and 53740 transitions. [2021-06-05 03:59:49,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 03:59:49,098 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:49,098 INFO L521 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:49,298 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 642 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1376 [2021-06-05 03:59:49,298 INFO L430 AbstractCegarLoop]: === Iteration 651 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:49,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:49,298 INFO L82 PathProgramCache]: Analyzing trace with hash 1855519693, now seen corresponding path program 397 times [2021-06-05 03:59:49,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:49,298 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407039911] [2021-06-05 03:59:49,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:49,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:49,417 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 76 proven. 151 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:59:49,418 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:49,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407039911] [2021-06-05 03:59:49,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407039911] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:49,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362689442] [2021-06-05 03:59:49,418 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 643 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 643 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:49,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:49,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 03:59:49,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:49,533 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 76 proven. 151 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:59:49,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362689442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:49,533 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:49,533 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2021-06-05 03:59:49,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584542349] [2021-06-05 03:59:49,533 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 03:59:49,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:49,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 03:59:49,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2021-06-05 03:59:49,534 INFO L87 Difference]: Start difference. First operand 20708 states and 53740 transitions. Second operand has 18 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 17 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:49,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:49,815 INFO L93 Difference]: Finished difference Result 25213 states and 61593 transitions. [2021-06-05 03:59:49,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 03:59:49,815 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 17 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 03:59:49,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:49,841 INFO L225 Difference]: With dead ends: 25213 [2021-06-05 03:59:49,842 INFO L226 Difference]: Without dead ends: 25159 [2021-06-05 03:59:49,842 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 165.8ms TimeCoverageRelationStatistics Valid=180, Invalid=420, Unknown=0, NotChecked=0, Total=600 [2021-06-05 03:59:49,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25159 states. [2021-06-05 03:59:50,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25159 to 20708. [2021-06-05 03:59:50,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20708 states, 20707 states have (on average 2.594823006712706) internal successors, (53731), 20707 states have internal predecessors, (53731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:50,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20708 states to 20708 states and 53731 transitions. [2021-06-05 03:59:50,117 INFO L78 Accepts]: Start accepts. Automaton has 20708 states and 53731 transitions. Word has length 65 [2021-06-05 03:59:50,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:50,117 INFO L482 AbstractCegarLoop]: Abstraction has 20708 states and 53731 transitions. [2021-06-05 03:59:50,117 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 17 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:50,117 INFO L276 IsEmpty]: Start isEmpty. Operand 20708 states and 53731 transitions. [2021-06-05 03:59:50,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 03:59:50,130 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:50,130 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:50,331 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 643 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1379 [2021-06-05 03:59:50,331 INFO L430 AbstractCegarLoop]: === Iteration 652 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:50,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:50,331 INFO L82 PathProgramCache]: Analyzing trace with hash 2136980874, now seen corresponding path program 196 times [2021-06-05 03:59:50,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:50,331 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259945082] [2021-06-05 03:59:50,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:50,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:50,429 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 10 proven. 213 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:59:50,430 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:50,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259945082] [2021-06-05 03:59:50,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259945082] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:50,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861475942] [2021-06-05 03:59:50,430 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 644 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 644 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:50,457 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:59:50,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:59:50,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 03:59:50,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:50,545 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 9 proven. 214 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:59:50,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861475942] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:50,545 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:50,545 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 03:59:50,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668718296] [2021-06-05 03:59:50,546 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 03:59:50,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:50,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 03:59:50,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:59:50,546 INFO L87 Difference]: Start difference. First operand 20708 states and 53731 transitions. Second operand has 13 states, 13 states have (on average 5.0) internal successors, (65), 12 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:51,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:51,157 INFO L93 Difference]: Finished difference Result 22901 states and 58040 transitions. [2021-06-05 03:59:51,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 03:59:51,157 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.0) internal successors, (65), 12 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 03:59:51,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:51,182 INFO L225 Difference]: With dead ends: 22901 [2021-06-05 03:59:51,182 INFO L226 Difference]: Without dead ends: 22879 [2021-06-05 03:59:51,182 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 160.0ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:59:51,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22879 states. [2021-06-05 03:59:51,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22879 to 21011. [2021-06-05 03:59:51,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21011 states, 21010 states have (on average 2.5923845787720134) internal successors, (54466), 21010 states have internal predecessors, (54466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:51,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21011 states to 21011 states and 54466 transitions. [2021-06-05 03:59:51,497 INFO L78 Accepts]: Start accepts. Automaton has 21011 states and 54466 transitions. Word has length 65 [2021-06-05 03:59:51,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:51,497 INFO L482 AbstractCegarLoop]: Abstraction has 21011 states and 54466 transitions. [2021-06-05 03:59:51,497 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.0) internal successors, (65), 12 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:51,497 INFO L276 IsEmpty]: Start isEmpty. Operand 21011 states and 54466 transitions. [2021-06-05 03:59:51,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 03:59:51,511 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:51,511 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:51,711 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 644 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1387 [2021-06-05 03:59:51,711 INFO L430 AbstractCegarLoop]: === Iteration 653 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:51,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:51,711 INFO L82 PathProgramCache]: Analyzing trace with hash -657653430, now seen corresponding path program 398 times [2021-06-05 03:59:51,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:51,712 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147139009] [2021-06-05 03:59:51,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:51,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:51,801 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 22 proven. 201 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:59:51,802 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:51,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147139009] [2021-06-05 03:59:51,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147139009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:51,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824422598] [2021-06-05 03:59:51,802 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 645 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 645 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:51,830 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:59:51,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:59:51,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 03:59:51,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:51,924 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 17 proven. 206 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:59:51,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824422598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:51,925 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:51,925 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 03:59:51,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948160135] [2021-06-05 03:59:51,925 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 03:59:51,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:51,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 03:59:51,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:59:51,925 INFO L87 Difference]: Start difference. First operand 21011 states and 54466 transitions. Second operand has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 12 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:52,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:52,775 INFO L93 Difference]: Finished difference Result 22325 states and 56767 transitions. [2021-06-05 03:59:52,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 03:59:52,775 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 12 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 03:59:52,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:52,799 INFO L225 Difference]: With dead ends: 22325 [2021-06-05 03:59:52,799 INFO L226 Difference]: Without dead ends: 22197 [2021-06-05 03:59:52,799 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 158.9ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:59:52,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22197 states. [2021-06-05 03:59:53,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22197 to 21057. [2021-06-05 03:59:53,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21057 states, 21056 states have (on average 2.585723784194529) internal successors, (54445), 21056 states have internal predecessors, (54445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:53,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21057 states to 21057 states and 54445 transitions. [2021-06-05 03:59:53,065 INFO L78 Accepts]: Start accepts. Automaton has 21057 states and 54445 transitions. Word has length 65 [2021-06-05 03:59:53,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:53,065 INFO L482 AbstractCegarLoop]: Abstraction has 21057 states and 54445 transitions. [2021-06-05 03:59:53,065 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 12 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:53,066 INFO L276 IsEmpty]: Start isEmpty. Operand 21057 states and 54445 transitions. [2021-06-05 03:59:53,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 03:59:53,079 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:53,080 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:53,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 645 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1388 [2021-06-05 03:59:53,280 INFO L430 AbstractCegarLoop]: === Iteration 654 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:53,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:53,280 INFO L82 PathProgramCache]: Analyzing trace with hash -1271189610, now seen corresponding path program 399 times [2021-06-05 03:59:53,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:53,280 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169415013] [2021-06-05 03:59:53,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:53,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:53,376 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 19 proven. 202 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 03:59:53,376 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:53,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169415013] [2021-06-05 03:59:53,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169415013] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:53,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361625291] [2021-06-05 03:59:53,377 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 646 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 646 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:53,410 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2021-06-05 03:59:53,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:59:53,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 03:59:53,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:53,494 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 203 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 03:59:53,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361625291] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:53,495 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:53,495 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 03:59:53,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339361655] [2021-06-05 03:59:53,495 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 03:59:53,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:53,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 03:59:53,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:59:53,495 INFO L87 Difference]: Start difference. First operand 21057 states and 54445 transitions. Second operand has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:54,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:54,094 INFO L93 Difference]: Finished difference Result 23159 states and 58564 transitions. [2021-06-05 03:59:54,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 03:59:54,094 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 03:59:54,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:54,119 INFO L225 Difference]: With dead ends: 23159 [2021-06-05 03:59:54,119 INFO L226 Difference]: Without dead ends: 23147 [2021-06-05 03:59:54,119 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 155.6ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:59:54,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23147 states. [2021-06-05 03:59:54,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23147 to 21201. [2021-06-05 03:59:54,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21201 states, 21200 states have (on average 2.5853301886792455) internal successors, (54809), 21200 states have internal predecessors, (54809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:54,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21201 states to 21201 states and 54809 transitions. [2021-06-05 03:59:54,396 INFO L78 Accepts]: Start accepts. Automaton has 21201 states and 54809 transitions. Word has length 65 [2021-06-05 03:59:54,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:54,396 INFO L482 AbstractCegarLoop]: Abstraction has 21201 states and 54809 transitions. [2021-06-05 03:59:54,396 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:54,396 INFO L276 IsEmpty]: Start isEmpty. Operand 21201 states and 54809 transitions. [2021-06-05 03:59:54,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 03:59:54,410 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:54,410 INFO L521 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:54,610 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 646 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1389 [2021-06-05 03:59:54,611 INFO L430 AbstractCegarLoop]: === Iteration 655 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:54,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:54,611 INFO L82 PathProgramCache]: Analyzing trace with hash -1428489097, now seen corresponding path program 197 times [2021-06-05 03:59:54,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:54,611 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912219162] [2021-06-05 03:59:54,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:54,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:54,682 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 146 proven. 80 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:59:54,683 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:54,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912219162] [2021-06-05 03:59:54,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912219162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:54,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63311859] [2021-06-05 03:59:54,683 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 647 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 647 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:54,720 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2021-06-05 03:59:54,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:59:54,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 03:59:54,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:54,855 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 147 proven. 80 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:59:54,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63311859] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:54,855 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:54,855 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 18] total 21 [2021-06-05 03:59:54,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462016234] [2021-06-05 03:59:54,855 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 03:59:54,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:54,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 03:59:54,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=303, Unknown=0, NotChecked=0, Total=462 [2021-06-05 03:59:54,855 INFO L87 Difference]: Start difference. First operand 21201 states and 54809 transitions. Second operand has 22 states, 22 states have (on average 4.545454545454546) internal successors, (100), 21 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:55,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:55,261 INFO L93 Difference]: Finished difference Result 25604 states and 63733 transitions. [2021-06-05 03:59:55,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 03:59:55,261 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.545454545454546) internal successors, (100), 21 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 03:59:55,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:55,289 INFO L225 Difference]: With dead ends: 25604 [2021-06-05 03:59:55,290 INFO L226 Difference]: Without dead ends: 25574 [2021-06-05 03:59:55,290 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 136.1ms TimeCoverageRelationStatistics Valid=194, Invalid=406, Unknown=0, NotChecked=0, Total=600 [2021-06-05 03:59:55,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25574 states. [2021-06-05 03:59:55,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25574 to 21847. [2021-06-05 03:59:55,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21847 states, 21846 states have (on average 2.5884830174860385) internal successors, (56548), 21846 states have internal predecessors, (56548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:55,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21847 states to 21847 states and 56548 transitions. [2021-06-05 03:59:55,684 INFO L78 Accepts]: Start accepts. Automaton has 21847 states and 56548 transitions. Word has length 65 [2021-06-05 03:59:55,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:55,684 INFO L482 AbstractCegarLoop]: Abstraction has 21847 states and 56548 transitions. [2021-06-05 03:59:55,684 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.545454545454546) internal successors, (100), 21 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:55,684 INFO L276 IsEmpty]: Start isEmpty. Operand 21847 states and 56548 transitions. [2021-06-05 03:59:55,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 03:59:55,697 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:55,697 INFO L521 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:55,897 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1390,647 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:55,897 INFO L430 AbstractCegarLoop]: === Iteration 656 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:55,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:55,898 INFO L82 PathProgramCache]: Analyzing trace with hash 1375420183, now seen corresponding path program 400 times [2021-06-05 03:59:55,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:55,898 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084279178] [2021-06-05 03:59:55,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:55,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:55,969 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 68 proven. 157 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:59:55,969 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:55,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084279178] [2021-06-05 03:59:55,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084279178] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:55,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876194056] [2021-06-05 03:59:55,969 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 648 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 648 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:55,996 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:59:55,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:59:55,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 03:59:55,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:56,081 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 68 proven. 157 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:59:56,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876194056] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:56,081 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:56,081 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-06-05 03:59:56,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046780255] [2021-06-05 03:59:56,081 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 03:59:56,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:56,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 03:59:56,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:59:56,081 INFO L87 Difference]: Start difference. First operand 21847 states and 56548 transitions. Second operand has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:56,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:56,289 INFO L93 Difference]: Finished difference Result 26845 states and 65318 transitions. [2021-06-05 03:59:56,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 03:59:56,289 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 03:59:56,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:56,319 INFO L225 Difference]: With dead ends: 26845 [2021-06-05 03:59:56,319 INFO L226 Difference]: Without dead ends: 26827 [2021-06-05 03:59:56,319 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 79.4ms TimeCoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:59:56,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26827 states. [2021-06-05 03:59:56,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26827 to 21826. [2021-06-05 03:59:56,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21826 states, 21825 states have (on average 2.586758304696449) internal successors, (56456), 21825 states have internal predecessors, (56456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:56,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21826 states to 21826 states and 56456 transitions. [2021-06-05 03:59:56,631 INFO L78 Accepts]: Start accepts. Automaton has 21826 states and 56456 transitions. Word has length 65 [2021-06-05 03:59:56,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:56,631 INFO L482 AbstractCegarLoop]: Abstraction has 21826 states and 56456 transitions. [2021-06-05 03:59:56,631 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:56,631 INFO L276 IsEmpty]: Start isEmpty. Operand 21826 states and 56456 transitions. [2021-06-05 03:59:56,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 03:59:56,646 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:56,646 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:56,846 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1393,648 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:56,846 INFO L430 AbstractCegarLoop]: === Iteration 657 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:56,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:56,846 INFO L82 PathProgramCache]: Analyzing trace with hash 870727724, now seen corresponding path program 401 times [2021-06-05 03:59:56,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:56,847 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755659788] [2021-06-05 03:59:56,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:56,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:56,943 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 19 proven. 204 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:59:56,944 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:56,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755659788] [2021-06-05 03:59:56,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755659788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:56,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113351495] [2021-06-05 03:59:56,944 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 649 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 649 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:56,977 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2021-06-05 03:59:56,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:59:56,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 03:59:56,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:57,063 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 205 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:59:57,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113351495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:57,063 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:57,063 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 03:59:57,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064834887] [2021-06-05 03:59:57,063 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:59:57,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:57,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:59:57,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:59:57,064 INFO L87 Difference]: Start difference. First operand 21826 states and 56456 transitions. Second operand has 14 states, 14 states have (on average 4.642857142857143) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:57,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:57,936 INFO L93 Difference]: Finished difference Result 26191 states and 65578 transitions. [2021-06-05 03:59:57,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 03:59:57,937 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.642857142857143) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 03:59:57,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:57,967 INFO L225 Difference]: With dead ends: 26191 [2021-06-05 03:59:57,967 INFO L226 Difference]: Without dead ends: 26137 [2021-06-05 03:59:57,967 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 70 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 278.1ms TimeCoverageRelationStatistics Valid=135, Invalid=1055, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 03:59:57,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26137 states. [2021-06-05 03:59:58,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26137 to 22289. [2021-06-05 03:59:58,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22289 states, 22288 states have (on average 2.589465183058148) internal successors, (57714), 22288 states have internal predecessors, (57714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:58,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22289 states to 22289 states and 57714 transitions. [2021-06-05 03:59:58,279 INFO L78 Accepts]: Start accepts. Automaton has 22289 states and 57714 transitions. Word has length 65 [2021-06-05 03:59:58,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:58,279 INFO L482 AbstractCegarLoop]: Abstraction has 22289 states and 57714 transitions. [2021-06-05 03:59:58,279 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.642857142857143) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:58,279 INFO L276 IsEmpty]: Start isEmpty. Operand 22289 states and 57714 transitions. [2021-06-05 03:59:58,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 03:59:58,293 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:58,293 INFO L521 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:58,494 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 649 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1396 [2021-06-05 03:59:58,494 INFO L430 AbstractCegarLoop]: === Iteration 658 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:58,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:58,494 INFO L82 PathProgramCache]: Analyzing trace with hash -1891680463, now seen corresponding path program 402 times [2021-06-05 03:59:58,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:58,494 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34898248] [2021-06-05 03:59:58,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:58,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:58,573 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 63 proven. 163 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:59:58,574 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:58,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34898248] [2021-06-05 03:59:58,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34898248] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:58,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443108668] [2021-06-05 03:59:58,574 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 650 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 650 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:58,608 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-06-05 03:59:58,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:59:58,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 03:59:58,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:58,693 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 63 proven. 163 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:59:58,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443108668] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:58,693 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:58,693 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-06-05 03:59:58,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91809714] [2021-06-05 03:59:58,693 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:59:58,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:58,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:59:58,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:59:58,694 INFO L87 Difference]: Start difference. First operand 22289 states and 57714 transitions. Second operand has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 13 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:58,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:58,926 INFO L93 Difference]: Finished difference Result 27384 states and 66666 transitions. [2021-06-05 03:59:58,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 03:59:58,926 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 13 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 03:59:58,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:58,957 INFO L225 Difference]: With dead ends: 27384 [2021-06-05 03:59:58,957 INFO L226 Difference]: Without dead ends: 27360 [2021-06-05 03:59:58,957 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 88.2ms TimeCoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:59:58,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27360 states. [2021-06-05 03:59:59,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27360 to 22289. [2021-06-05 03:59:59,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22289 states, 22288 states have (on average 2.588702440775305) internal successors, (57697), 22288 states have internal predecessors, (57697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:59,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22289 states to 22289 states and 57697 transitions. [2021-06-05 03:59:59,279 INFO L78 Accepts]: Start accepts. Automaton has 22289 states and 57697 transitions. Word has length 65 [2021-06-05 03:59:59,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:59,279 INFO L482 AbstractCegarLoop]: Abstraction has 22289 states and 57697 transitions. [2021-06-05 03:59:59,279 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 13 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:59,279 INFO L276 IsEmpty]: Start isEmpty. Operand 22289 states and 57697 transitions. [2021-06-05 03:59:59,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 03:59:59,293 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:59,293 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:59,493 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 650 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1397 [2021-06-05 03:59:59,494 INFO L430 AbstractCegarLoop]: === Iteration 659 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:59,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:59,494 INFO L82 PathProgramCache]: Analyzing trace with hash 1025564258, now seen corresponding path program 403 times [2021-06-05 03:59:59,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:59,494 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165204348] [2021-06-05 03:59:59,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:59,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:59,602 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 19 proven. 204 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:59:59,602 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:59,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165204348] [2021-06-05 03:59:59,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165204348] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:59,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275512512] [2021-06-05 03:59:59,602 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 651 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 651 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:59,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:59,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 03:59:59,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:59,717 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 205 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 03:59:59,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275512512] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:59,717 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:59,717 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 03:59:59,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426692552] [2021-06-05 03:59:59,717 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 03:59:59,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:59,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 03:59:59,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:59:59,717 INFO L87 Difference]: Start difference. First operand 22289 states and 57697 transitions. Second operand has 15 states, 15 states have (on average 4.333333333333333) internal successors, (65), 14 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:01,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:00:01,097 INFO L93 Difference]: Finished difference Result 31771 states and 78106 transitions. [2021-06-05 04:00:01,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 04:00:01,097 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.333333333333333) internal successors, (65), 14 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 04:00:01,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:00:01,133 INFO L225 Difference]: With dead ends: 31771 [2021-06-05 04:00:01,133 INFO L226 Difference]: Without dead ends: 31603 [2021-06-05 04:00:01,133 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 69 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 989 ImplicationChecksByTransitivity, 576.8ms TimeCoverageRelationStatistics Valid=333, Invalid=3089, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 04:00:01,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31603 states. [2021-06-05 04:00:01,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31603 to 23236. [2021-06-05 04:00:01,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23236 states, 23235 states have (on average 2.5904884871960405) internal successors, (60190), 23235 states have internal predecessors, (60190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:01,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23236 states to 23236 states and 60190 transitions. [2021-06-05 04:00:01,488 INFO L78 Accepts]: Start accepts. Automaton has 23236 states and 60190 transitions. Word has length 65 [2021-06-05 04:00:01,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:00:01,488 INFO L482 AbstractCegarLoop]: Abstraction has 23236 states and 60190 transitions. [2021-06-05 04:00:01,488 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.333333333333333) internal successors, (65), 14 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:01,488 INFO L276 IsEmpty]: Start isEmpty. Operand 23236 states and 60190 transitions. [2021-06-05 04:00:01,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 04:00:01,505 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:00:01,506 INFO L521 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:00:01,706 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 651 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1401 [2021-06-05 04:00:01,706 INFO L430 AbstractCegarLoop]: === Iteration 660 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:00:01,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:00:01,706 INFO L82 PathProgramCache]: Analyzing trace with hash 1412166935, now seen corresponding path program 404 times [2021-06-05 04:00:01,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:00:01,706 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049154958] [2021-06-05 04:00:01,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:00:01,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:00:01,798 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 55 proven. 171 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:00:01,798 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:00:01,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049154958] [2021-06-05 04:00:01,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049154958] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:01,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334908481] [2021-06-05 04:00:01,798 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 652 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 652 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:00:01,827 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:00:01,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:00:01,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:00:01,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:00:01,918 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 55 proven. 171 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:00:01,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1334908481] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:01,918 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:00:01,918 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-06-05 04:00:01,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179149753] [2021-06-05 04:00:01,918 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:00:01,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:00:01,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:00:01,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:00:01,919 INFO L87 Difference]: Start difference. First operand 23236 states and 60190 transitions. Second operand has 15 states, 15 states have (on average 4.266666666666667) internal successors, (64), 14 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:02,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:00:02,168 INFO L93 Difference]: Finished difference Result 28515 states and 69490 transitions. [2021-06-05 04:00:02,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:00:02,168 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.266666666666667) internal successors, (64), 14 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 04:00:02,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:00:02,201 INFO L225 Difference]: With dead ends: 28515 [2021-06-05 04:00:02,201 INFO L226 Difference]: Without dead ends: 28482 [2021-06-05 04:00:02,201 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 109.3ms TimeCoverageRelationStatistics Valid=118, Invalid=224, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:00:02,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28482 states. [2021-06-05 04:00:02,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28482 to 23236. [2021-06-05 04:00:02,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23236 states, 23235 states have (on average 2.590101140520766) internal successors, (60181), 23235 states have internal predecessors, (60181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:02,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23236 states to 23236 states and 60181 transitions. [2021-06-05 04:00:02,535 INFO L78 Accepts]: Start accepts. Automaton has 23236 states and 60181 transitions. Word has length 65 [2021-06-05 04:00:02,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:00:02,535 INFO L482 AbstractCegarLoop]: Abstraction has 23236 states and 60181 transitions. [2021-06-05 04:00:02,535 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.266666666666667) internal successors, (64), 14 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:02,535 INFO L276 IsEmpty]: Start isEmpty. Operand 23236 states and 60181 transitions. [2021-06-05 04:00:02,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 04:00:02,550 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:00:02,550 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:00:02,750 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 652 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1402 [2021-06-05 04:00:02,750 INFO L430 AbstractCegarLoop]: === Iteration 661 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:00:02,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:00:02,750 INFO L82 PathProgramCache]: Analyzing trace with hash 965872748, now seen corresponding path program 405 times [2021-06-05 04:00:02,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:00:02,750 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188252579] [2021-06-05 04:00:02,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:00:02,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:00:02,869 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 19 proven. 204 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:00:02,869 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:00:02,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188252579] [2021-06-05 04:00:02,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188252579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:02,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409507520] [2021-06-05 04:00:02,869 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 653 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 653 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:00:02,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2021-06-05 04:00:02,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:00:02,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:00:02,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:00:02,988 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 205 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:00:02,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409507520] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:02,988 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:00:02,989 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 04:00:02,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602227853] [2021-06-05 04:00:02,989 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:00:02,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:00:02,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:00:02,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:00:02,989 INFO L87 Difference]: Start difference. First operand 23236 states and 60181 transitions. Second operand has 16 states, 16 states have (on average 4.0625) internal successors, (65), 15 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:05,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:00:05,115 INFO L93 Difference]: Finished difference Result 43429 states and 104578 transitions. [2021-06-05 04:00:05,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-06-05 04:00:05,115 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.0625) internal successors, (65), 15 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 04:00:05,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:00:05,162 INFO L225 Difference]: With dead ends: 43429 [2021-06-05 04:00:05,162 INFO L226 Difference]: Without dead ends: 42973 [2021-06-05 04:00:05,163 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3483 ImplicationChecksByTransitivity, 1081.1ms TimeCoverageRelationStatistics Valid=819, Invalid=8883, Unknown=0, NotChecked=0, Total=9702 [2021-06-05 04:00:05,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42973 states. [2021-06-05 04:00:05,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42973 to 24902. [2021-06-05 04:00:05,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24902 states, 24901 states have (on average 2.590699168708084) internal successors, (64511), 24901 states have internal predecessors, (64511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:05,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24902 states to 24902 states and 64511 transitions. [2021-06-05 04:00:05,606 INFO L78 Accepts]: Start accepts. Automaton has 24902 states and 64511 transitions. Word has length 65 [2021-06-05 04:00:05,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:00:05,606 INFO L482 AbstractCegarLoop]: Abstraction has 24902 states and 64511 transitions. [2021-06-05 04:00:05,606 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.0625) internal successors, (65), 15 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:05,606 INFO L276 IsEmpty]: Start isEmpty. Operand 24902 states and 64511 transitions. [2021-06-05 04:00:05,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 04:00:05,622 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:00:05,622 INFO L521 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:00:05,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1407,653 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:00:05,824 INFO L430 AbstractCegarLoop]: === Iteration 662 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:00:05,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:00:05,824 INFO L82 PathProgramCache]: Analyzing trace with hash -1435521679, now seen corresponding path program 406 times [2021-06-05 04:00:05,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:00:05,824 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114866449] [2021-06-05 04:00:05,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:00:05,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:00:05,922 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 53 proven. 173 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:00:05,922 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:00:05,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114866449] [2021-06-05 04:00:05,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114866449] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:05,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157519743] [2021-06-05 04:00:05,922 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 654 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 654 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:00:05,950 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:00:05,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:00:05,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:00:05,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:00:06,039 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 53 proven. 173 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:00:06,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157519743] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:06,039 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:00:06,039 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-06-05 04:00:06,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608724148] [2021-06-05 04:00:06,040 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:00:06,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:00:06,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:00:06,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:00:06,040 INFO L87 Difference]: Start difference. First operand 24902 states and 64511 transitions. Second operand has 16 states, 16 states have (on average 4.0) internal successors, (64), 15 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:06,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:00:06,360 INFO L93 Difference]: Finished difference Result 30490 states and 74400 transitions. [2021-06-05 04:00:06,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:00:06,361 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.0) internal successors, (64), 15 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 04:00:06,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:00:06,396 INFO L225 Difference]: With dead ends: 30490 [2021-06-05 04:00:06,396 INFO L226 Difference]: Without dead ends: 30448 [2021-06-05 04:00:06,396 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 125.6ms TimeCoverageRelationStatistics Valid=139, Invalid=281, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:00:06,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30448 states. [2021-06-05 04:00:06,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30448 to 24902. [2021-06-05 04:00:06,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24902 states, 24901 states have (on average 2.5903377374402634) internal successors, (64502), 24901 states have internal predecessors, (64502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:06,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24902 states to 24902 states and 64502 transitions. [2021-06-05 04:00:06,771 INFO L78 Accepts]: Start accepts. Automaton has 24902 states and 64502 transitions. Word has length 65 [2021-06-05 04:00:06,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:00:06,772 INFO L482 AbstractCegarLoop]: Abstraction has 24902 states and 64502 transitions. [2021-06-05 04:00:06,772 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.0) internal successors, (64), 15 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:06,772 INFO L276 IsEmpty]: Start isEmpty. Operand 24902 states and 64502 transitions. [2021-06-05 04:00:06,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 04:00:06,787 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:00:06,787 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:00:06,987 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1408,654 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:00:06,987 INFO L430 AbstractCegarLoop]: === Iteration 663 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:00:06,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:00:06,987 INFO L82 PathProgramCache]: Analyzing trace with hash 812558882, now seen corresponding path program 407 times [2021-06-05 04:00:06,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:00:06,988 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554093655] [2021-06-05 04:00:06,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:00:06,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:00:07,118 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 19 proven. 204 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:00:07,118 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:00:07,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554093655] [2021-06-05 04:00:07,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554093655] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:07,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738512893] [2021-06-05 04:00:07,118 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 655 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 655 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:00:07,153 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2021-06-05 04:00:07,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:00:07,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:00:07,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:00:07,240 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 205 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:00:07,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738512893] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:07,241 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:00:07,241 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-06-05 04:00:07,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861102243] [2021-06-05 04:00:07,241 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:00:07,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:00:07,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:00:07,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:00:07,241 INFO L87 Difference]: Start difference. First operand 24902 states and 64502 transitions. Second operand has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 16 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:10,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:00:10,448 INFO L93 Difference]: Finished difference Result 69310 states and 163134 transitions. [2021-06-05 04:00:10,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 163 states. [2021-06-05 04:00:10,449 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 16 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 04:00:10,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:00:10,532 INFO L225 Difference]: With dead ends: 69310 [2021-06-05 04:00:10,532 INFO L226 Difference]: Without dead ends: 67924 [2021-06-05 04:00:10,534 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10744 ImplicationChecksByTransitivity, 2133.5ms TimeCoverageRelationStatistics Valid=1953, Invalid=24453, Unknown=0, NotChecked=0, Total=26406 [2021-06-05 04:00:10,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67924 states. [2021-06-05 04:00:11,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67924 to 27517. [2021-06-05 04:00:11,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27517 states, 27516 states have (on average 2.5895842418956243) internal successors, (71255), 27516 states have internal predecessors, (71255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:11,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27517 states to 27517 states and 71255 transitions. [2021-06-05 04:00:11,165 INFO L78 Accepts]: Start accepts. Automaton has 27517 states and 71255 transitions. Word has length 65 [2021-06-05 04:00:11,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:00:11,165 INFO L482 AbstractCegarLoop]: Abstraction has 27517 states and 71255 transitions. [2021-06-05 04:00:11,165 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 16 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:11,165 INFO L276 IsEmpty]: Start isEmpty. Operand 27517 states and 71255 transitions. [2021-06-05 04:00:11,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 04:00:11,180 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:00:11,180 INFO L521 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:00:11,380 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1414,655 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:00:11,380 INFO L430 AbstractCegarLoop]: === Iteration 664 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:00:11,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:00:11,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1561976535, now seen corresponding path program 408 times [2021-06-05 04:00:11,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:00:11,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128665877] [2021-06-05 04:00:11,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:00:11,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:00:11,491 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 57 proven. 169 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:00:11,491 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:00:11,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128665877] [2021-06-05 04:00:11,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128665877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:11,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51425490] [2021-06-05 04:00:11,491 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 656 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 656 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:00:11,523 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-06-05 04:00:11,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:00:11,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:00:11,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:00:11,611 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 57 proven. 169 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:00:11,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51425490] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:11,611 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:00:11,611 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2021-06-05 04:00:11,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053105296] [2021-06-05 04:00:11,611 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:00:11,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:00:11,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:00:11,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:00:11,612 INFO L87 Difference]: Start difference. First operand 27517 states and 71255 transitions. Second operand has 17 states, 17 states have (on average 3.764705882352941) internal successors, (64), 16 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:11,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:00:11,908 INFO L93 Difference]: Finished difference Result 33599 states and 82086 transitions. [2021-06-05 04:00:11,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:00:11,909 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.764705882352941) internal successors, (64), 16 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 04:00:11,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:00:11,948 INFO L225 Difference]: With dead ends: 33599 [2021-06-05 04:00:11,948 INFO L226 Difference]: Without dead ends: 33548 [2021-06-05 04:00:11,949 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 146.7ms TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:00:11,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33548 states. [2021-06-05 04:00:12,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33548 to 27517. [2021-06-05 04:00:12,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27517 states, 27516 states have (on average 2.5892571594708533) internal successors, (71246), 27516 states have internal predecessors, (71246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:12,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27517 states to 27517 states and 71246 transitions. [2021-06-05 04:00:12,388 INFO L78 Accepts]: Start accepts. Automaton has 27517 states and 71246 transitions. Word has length 65 [2021-06-05 04:00:12,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:00:12,388 INFO L482 AbstractCegarLoop]: Abstraction has 27517 states and 71246 transitions. [2021-06-05 04:00:12,388 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.764705882352941) internal successors, (64), 16 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:12,388 INFO L276 IsEmpty]: Start isEmpty. Operand 27517 states and 71246 transitions. [2021-06-05 04:00:12,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 04:00:12,404 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:00:12,404 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:00:12,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 656 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1415 [2021-06-05 04:00:12,604 INFO L430 AbstractCegarLoop]: === Iteration 665 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:00:12,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:00:12,605 INFO L82 PathProgramCache]: Analyzing trace with hash -1010587476, now seen corresponding path program 409 times [2021-06-05 04:00:12,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:00:12,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039042132] [2021-06-05 04:00:12,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:00:12,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:00:12,745 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 19 proven. 204 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:00:12,745 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:00:12,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039042132] [2021-06-05 04:00:12,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039042132] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:12,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426455602] [2021-06-05 04:00:12,745 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 657 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 657 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:00:12,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:00:12,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:00:12,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:00:12,857 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 205 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:00:12,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426455602] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:12,857 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:00:12,858 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2021-06-05 04:00:12,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964779066] [2021-06-05 04:00:12,858 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:00:12,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:00:12,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:00:12,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:00:12,858 INFO L87 Difference]: Start difference. First operand 27517 states and 71246 transitions. Second operand has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:18,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:00:18,174 INFO L93 Difference]: Finished difference Result 88601 states and 209190 transitions. [2021-06-05 04:00:18,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 259 states. [2021-06-05 04:00:18,175 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 04:00:18,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:00:18,292 INFO L225 Difference]: With dead ends: 88601 [2021-06-05 04:00:18,292 INFO L226 Difference]: Without dead ends: 87281 [2021-06-05 04:00:18,298 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 66 SyntacticMatches, 2 SemanticMatches, 257 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29314 ImplicationChecksByTransitivity, 4088.6ms TimeCoverageRelationStatistics Valid=4383, Invalid=62439, Unknown=0, NotChecked=0, Total=66822 [2021-06-05 04:00:18,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87281 states. [2021-06-05 04:00:19,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87281 to 29787. [2021-06-05 04:00:19,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29787 states, 29786 states have (on average 2.5864164372524003) internal successors, (77039), 29786 states have internal predecessors, (77039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:19,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29787 states to 29787 states and 77039 transitions. [2021-06-05 04:00:19,202 INFO L78 Accepts]: Start accepts. Automaton has 29787 states and 77039 transitions. Word has length 65 [2021-06-05 04:00:19,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:00:19,202 INFO L482 AbstractCegarLoop]: Abstraction has 29787 states and 77039 transitions. [2021-06-05 04:00:19,202 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:19,202 INFO L276 IsEmpty]: Start isEmpty. Operand 29787 states and 77039 transitions. [2021-06-05 04:00:19,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 04:00:19,219 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:00:19,219 INFO L521 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:00:19,419 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 657 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1422 [2021-06-05 04:00:19,419 INFO L430 AbstractCegarLoop]: === Iteration 666 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:00:19,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:00:19,420 INFO L82 PathProgramCache]: Analyzing trace with hash -928748623, now seen corresponding path program 410 times [2021-06-05 04:00:19,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:00:19,420 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375739797] [2021-06-05 04:00:19,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:00:19,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:00:19,550 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 67 proven. 159 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:00:19,550 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:00:19,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375739797] [2021-06-05 04:00:19,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375739797] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:19,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577216228] [2021-06-05 04:00:19,550 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 658 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 658 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:00:19,579 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:00:19,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:00:19,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:00:19,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:00:19,680 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 67 proven. 159 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:00:19,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577216228] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:19,680 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:00:19,680 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2021-06-05 04:00:19,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097869053] [2021-06-05 04:00:19,680 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:00:19,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:00:19,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:00:19,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:00:19,680 INFO L87 Difference]: Start difference. First operand 29787 states and 77039 transitions. Second operand has 18 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 17 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:20,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:00:20,043 INFO L93 Difference]: Finished difference Result 36048 states and 88237 transitions. [2021-06-05 04:00:20,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:00:20,043 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 17 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 04:00:20,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:00:20,092 INFO L225 Difference]: With dead ends: 36048 [2021-06-05 04:00:20,092 INFO L226 Difference]: Without dead ends: 35988 [2021-06-05 04:00:20,092 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 180.1ms TimeCoverageRelationStatistics Valid=187, Invalid=413, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:00:20,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35988 states. [2021-06-05 04:00:20,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35988 to 29354. [2021-06-05 04:00:20,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29354 states, 29353 states have (on average 2.583756345177665) internal successors, (75841), 29353 states have internal predecessors, (75841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:20,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29354 states to 29354 states and 75841 transitions. [2021-06-05 04:00:20,604 INFO L78 Accepts]: Start accepts. Automaton has 29354 states and 75841 transitions. Word has length 65 [2021-06-05 04:00:20,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:00:20,604 INFO L482 AbstractCegarLoop]: Abstraction has 29354 states and 75841 transitions. [2021-06-05 04:00:20,604 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 17 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:20,604 INFO L276 IsEmpty]: Start isEmpty. Operand 29354 states and 75841 transitions. [2021-06-05 04:00:20,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 04:00:20,622 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:00:20,622 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:00:20,822 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 658 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1423 [2021-06-05 04:00:20,822 INFO L430 AbstractCegarLoop]: === Iteration 667 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:00:20,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:00:20,822 INFO L82 PathProgramCache]: Analyzing trace with hash -207313438, now seen corresponding path program 411 times [2021-06-05 04:00:20,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:00:20,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187088496] [2021-06-05 04:00:20,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:00:20,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:00:20,985 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 207 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:00:20,985 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:00:20,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187088496] [2021-06-05 04:00:20,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187088496] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:20,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615877519] [2021-06-05 04:00:20,985 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 659 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 659 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:00:21,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2021-06-05 04:00:21,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:00:21,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:00:21,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:00:21,112 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 207 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:00:21,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615877519] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:21,113 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:00:21,113 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 18 [2021-06-05 04:00:21,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483843307] [2021-06-05 04:00:21,113 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:00:21,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:00:21,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:00:21,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=305, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:00:21,113 INFO L87 Difference]: Start difference. First operand 29354 states and 75841 transitions. Second operand has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 18 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:22,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:00:22,236 INFO L93 Difference]: Finished difference Result 42805 states and 102748 transitions. [2021-06-05 04:00:22,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 04:00:22,236 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 18 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 04:00:22,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:00:22,286 INFO L225 Difference]: With dead ends: 42805 [2021-06-05 04:00:22,287 INFO L226 Difference]: Without dead ends: 41023 [2021-06-05 04:00:22,287 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 65 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 457.4ms TimeCoverageRelationStatistics Valid=230, Invalid=1330, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 04:00:22,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41023 states. [2021-06-05 04:00:22,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41023 to 21413. [2021-06-05 04:00:22,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21413 states, 21412 states have (on average 2.5783205679058474) internal successors, (55207), 21412 states have internal predecessors, (55207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:22,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21413 states to 21413 states and 55207 transitions. [2021-06-05 04:00:22,698 INFO L78 Accepts]: Start accepts. Automaton has 21413 states and 55207 transitions. Word has length 65 [2021-06-05 04:00:22,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:00:22,699 INFO L482 AbstractCegarLoop]: Abstraction has 21413 states and 55207 transitions. [2021-06-05 04:00:22,699 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 18 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:22,699 INFO L276 IsEmpty]: Start isEmpty. Operand 21413 states and 55207 transitions. [2021-06-05 04:00:22,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 04:00:22,713 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:00:22,714 INFO L521 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:00:22,914 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 659 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1431 [2021-06-05 04:00:22,914 INFO L430 AbstractCegarLoop]: === Iteration 668 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:00:22,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:00:22,914 INFO L82 PathProgramCache]: Analyzing trace with hash -1067255365, now seen corresponding path program 198 times [2021-06-05 04:00:22,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:00:22,914 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855254205] [2021-06-05 04:00:22,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:00:22,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:00:22,988 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 170 proven. 56 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:00:22,988 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:00:22,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855254205] [2021-06-05 04:00:22,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855254205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:22,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3042591] [2021-06-05 04:00:22,988 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 660 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 660 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:00:23,023 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2021-06-05 04:00:23,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:00:23,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:00:23,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:00:23,115 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 171 proven. 56 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:00:23,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3042591] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:23,115 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:00:23,115 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2021-06-05 04:00:23,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607316272] [2021-06-05 04:00:23,115 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:00:23,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:00:23,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:00:23,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=104, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:00:23,116 INFO L87 Difference]: Start difference. First operand 21413 states and 55207 transitions. Second operand has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:23,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:00:23,499 INFO L93 Difference]: Finished difference Result 31342 states and 77017 transitions. [2021-06-05 04:00:23,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:00:23,500 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 04:00:23,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:00:23,537 INFO L225 Difference]: With dead ends: 31342 [2021-06-05 04:00:23,537 INFO L226 Difference]: Without dead ends: 31342 [2021-06-05 04:00:23,537 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 118.7ms TimeCoverageRelationStatistics Valid=176, Invalid=244, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:00:23,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31342 states. [2021-06-05 04:00:23,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31342 to 21689. [2021-06-05 04:00:23,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21689 states, 21688 states have (on average 2.58382515676872) internal successors, (56038), 21688 states have internal predecessors, (56038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:23,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21689 states to 21689 states and 56038 transitions. [2021-06-05 04:00:23,880 INFO L78 Accepts]: Start accepts. Automaton has 21689 states and 56038 transitions. Word has length 65 [2021-06-05 04:00:23,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:00:23,880 INFO L482 AbstractCegarLoop]: Abstraction has 21689 states and 56038 transitions. [2021-06-05 04:00:23,880 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:23,880 INFO L276 IsEmpty]: Start isEmpty. Operand 21689 states and 56038 transitions. [2021-06-05 04:00:23,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 04:00:23,895 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:00:23,895 INFO L521 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:00:24,095 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 660 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1432 [2021-06-05 04:00:24,095 INFO L430 AbstractCegarLoop]: === Iteration 669 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:00:24,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:00:24,096 INFO L82 PathProgramCache]: Analyzing trace with hash 1590139475, now seen corresponding path program 199 times [2021-06-05 04:00:24,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:00:24,096 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432343122] [2021-06-05 04:00:24,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:00:24,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:00:24,178 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 169 proven. 57 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:00:24,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:00:24,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432343122] [2021-06-05 04:00:24,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432343122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:24,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661586002] [2021-06-05 04:00:24,178 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 661 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 661 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:00:24,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:00:24,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:00:24,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:00:24,297 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 170 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:00:24,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661586002] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:24,298 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:00:24,298 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 14 [2021-06-05 04:00:24,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808982104] [2021-06-05 04:00:24,298 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:00:24,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:00:24,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:00:24,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=129, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:00:24,298 INFO L87 Difference]: Start difference. First operand 21689 states and 56038 transitions. Second operand has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:24,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:00:24,716 INFO L93 Difference]: Finished difference Result 35356 states and 86322 transitions. [2021-06-05 04:00:24,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 04:00:24,716 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 04:00:24,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:00:24,759 INFO L225 Difference]: With dead ends: 35356 [2021-06-05 04:00:24,759 INFO L226 Difference]: Without dead ends: 35356 [2021-06-05 04:00:24,759 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 178.2ms TimeCoverageRelationStatistics Valid=296, Invalid=460, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:00:24,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35356 states. [2021-06-05 04:00:25,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35356 to 21737. [2021-06-05 04:00:25,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21737 states, 21736 states have (on average 2.584606183290394) internal successors, (56179), 21736 states have internal predecessors, (56179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:25,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21737 states to 21737 states and 56179 transitions. [2021-06-05 04:00:25,131 INFO L78 Accepts]: Start accepts. Automaton has 21737 states and 56179 transitions. Word has length 65 [2021-06-05 04:00:25,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:00:25,131 INFO L482 AbstractCegarLoop]: Abstraction has 21737 states and 56179 transitions. [2021-06-05 04:00:25,131 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:25,131 INFO L276 IsEmpty]: Start isEmpty. Operand 21737 states and 56179 transitions. [2021-06-05 04:00:25,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 04:00:25,147 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:00:25,147 INFO L521 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:00:25,347 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1433,661 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:00:25,347 INFO L430 AbstractCegarLoop]: === Iteration 670 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:00:25,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:00:25,348 INFO L82 PathProgramCache]: Analyzing trace with hash -99855689, now seen corresponding path program 200 times [2021-06-05 04:00:25,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:00:25,348 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833833246] [2021-06-05 04:00:25,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:00:25,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:00:25,439 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 162 proven. 64 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:00:25,439 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:00:25,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833833246] [2021-06-05 04:00:25,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833833246] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:25,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350592438] [2021-06-05 04:00:25,439 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 662 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 662 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:00:25,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:00:25,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:00:25,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:00:25,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:00:25,558 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 163 proven. 64 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:00:25,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350592438] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:25,558 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:00:25,558 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 15 [2021-06-05 04:00:25,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510361321] [2021-06-05 04:00:25,558 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:00:25,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:00:25,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:00:25,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:00:25,559 INFO L87 Difference]: Start difference. First operand 21737 states and 56179 transitions. Second operand has 16 states, 16 states have (on average 4.3125) internal successors, (69), 15 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:26,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:00:26,066 INFO L93 Difference]: Finished difference Result 37231 states and 90722 transitions. [2021-06-05 04:00:26,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 04:00:26,066 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.3125) internal successors, (69), 15 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 04:00:26,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:00:26,109 INFO L225 Difference]: With dead ends: 37231 [2021-06-05 04:00:26,109 INFO L226 Difference]: Without dead ends: 37231 [2021-06-05 04:00:26,109 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 226.0ms TimeCoverageRelationStatistics Valid=403, Invalid=653, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 04:00:26,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37231 states. [2021-06-05 04:00:26,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37231 to 21806. [2021-06-05 04:00:26,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21806 states, 21805 states have (on average 2.5857830772758543) internal successors, (56383), 21805 states have internal predecessors, (56383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:26,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21806 states to 21806 states and 56383 transitions. [2021-06-05 04:00:26,487 INFO L78 Accepts]: Start accepts. Automaton has 21806 states and 56383 transitions. Word has length 65 [2021-06-05 04:00:26,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:00:26,487 INFO L482 AbstractCegarLoop]: Abstraction has 21806 states and 56383 transitions. [2021-06-05 04:00:26,487 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.3125) internal successors, (69), 15 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:26,487 INFO L276 IsEmpty]: Start isEmpty. Operand 21806 states and 56383 transitions. [2021-06-05 04:00:26,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 04:00:26,502 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:00:26,502 INFO L521 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:00:26,702 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 662 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1434 [2021-06-05 04:00:26,702 INFO L430 AbstractCegarLoop]: === Iteration 671 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:00:26,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:00:26,702 INFO L82 PathProgramCache]: Analyzing trace with hash -1139142701, now seen corresponding path program 201 times [2021-06-05 04:00:26,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:00:26,702 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770414335] [2021-06-05 04:00:26,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:00:26,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:00:26,805 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 155 proven. 71 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:00:26,805 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:00:26,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770414335] [2021-06-05 04:00:26,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770414335] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:26,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948713131] [2021-06-05 04:00:26,805 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 663 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 663 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:00:26,840 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2021-06-05 04:00:26,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:00:26,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:00:26,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:00:26,933 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 156 proven. 71 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:00:26,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948713131] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:26,933 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:00:26,933 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 16 [2021-06-05 04:00:26,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3456358] [2021-06-05 04:00:26,933 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:00:26,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:00:26,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:00:26,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:00:26,934 INFO L87 Difference]: Start difference. First operand 21806 states and 56383 transitions. Second operand has 17 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 16 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:27,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:00:27,543 INFO L93 Difference]: Finished difference Result 37033 states and 90316 transitions. [2021-06-05 04:00:27,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 04:00:27,543 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 16 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 04:00:27,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:00:27,585 INFO L225 Difference]: With dead ends: 37033 [2021-06-05 04:00:27,585 INFO L226 Difference]: Without dead ends: 37033 [2021-06-05 04:00:27,586 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 265.4ms TimeCoverageRelationStatistics Valid=478, Invalid=782, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 04:00:27,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37033 states. [2021-06-05 04:00:27,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37033 to 21884. [2021-06-05 04:00:27,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21884 states, 21883 states have (on average 2.5871224237992965) internal successors, (56614), 21883 states have internal predecessors, (56614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:27,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21884 states to 21884 states and 56614 transitions. [2021-06-05 04:00:27,949 INFO L78 Accepts]: Start accepts. Automaton has 21884 states and 56614 transitions. Word has length 65 [2021-06-05 04:00:27,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:00:27,949 INFO L482 AbstractCegarLoop]: Abstraction has 21884 states and 56614 transitions. [2021-06-05 04:00:27,949 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 16 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:27,949 INFO L276 IsEmpty]: Start isEmpty. Operand 21884 states and 56614 transitions. [2021-06-05 04:00:27,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 04:00:27,964 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:00:27,964 INFO L521 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:00:28,164 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1435,663 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:00:28,164 INFO L430 AbstractCegarLoop]: === Iteration 672 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:00:28,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:00:28,164 INFO L82 PathProgramCache]: Analyzing trace with hash -119280329, now seen corresponding path program 202 times [2021-06-05 04:00:28,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:00:28,164 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527166368] [2021-06-05 04:00:28,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:00:28,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:00:28,278 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 148 proven. 78 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:00:28,278 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:00:28,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527166368] [2021-06-05 04:00:28,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527166368] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:28,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094596825] [2021-06-05 04:00:28,278 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 664 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 664 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:00:28,305 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:00:28,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:00:28,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:00:28,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:00:28,399 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 149 proven. 78 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:00:28,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094596825] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:28,400 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:00:28,400 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 17 [2021-06-05 04:00:28,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345409105] [2021-06-05 04:00:28,400 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:00:28,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:00:28,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:00:28,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:00:28,400 INFO L87 Difference]: Start difference. First operand 21884 states and 56614 transitions. Second operand has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 17 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:28,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:00:28,984 INFO L93 Difference]: Finished difference Result 34831 states and 85232 transitions. [2021-06-05 04:00:28,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 04:00:28,984 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 17 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 04:00:28,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:00:29,023 INFO L225 Difference]: With dead ends: 34831 [2021-06-05 04:00:29,023 INFO L226 Difference]: Without dead ends: 34831 [2021-06-05 04:00:29,024 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 283.6ms TimeCoverageRelationStatistics Valid=503, Invalid=829, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 04:00:29,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34831 states. [2021-06-05 04:00:29,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34831 to 21919. [2021-06-05 04:00:29,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21919 states, 21918 states have (on average 2.5879186057122) internal successors, (56722), 21918 states have internal predecessors, (56722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:29,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21919 states to 21919 states and 56722 transitions. [2021-06-05 04:00:29,382 INFO L78 Accepts]: Start accepts. Automaton has 21919 states and 56722 transitions. Word has length 65 [2021-06-05 04:00:29,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:00:29,382 INFO L482 AbstractCegarLoop]: Abstraction has 21919 states and 56722 transitions. [2021-06-05 04:00:29,382 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 17 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:29,382 INFO L276 IsEmpty]: Start isEmpty. Operand 21919 states and 56722 transitions. [2021-06-05 04:00:29,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 04:00:29,397 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:00:29,397 INFO L521 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:00:29,597 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 664 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1436 [2021-06-05 04:00:29,597 INFO L430 AbstractCegarLoop]: === Iteration 673 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:00:29,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:00:29,598 INFO L82 PathProgramCache]: Analyzing trace with hash 1992019, now seen corresponding path program 203 times [2021-06-05 04:00:29,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:00:29,598 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613195165] [2021-06-05 04:00:29,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:00:29,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:00:29,725 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 141 proven. 85 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:00:29,725 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:00:29,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613195165] [2021-06-05 04:00:29,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613195165] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:29,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273743841] [2021-06-05 04:00:29,725 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 665 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 665 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:00:29,761 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-06-05 04:00:29,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:00:29,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:00:29,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:00:30,046 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 142 proven. 85 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:00:30,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273743841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:30,046 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:00:30,046 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 20] total 36 [2021-06-05 04:00:30,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340838160] [2021-06-05 04:00:30,046 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 04:00:30,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:00:30,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 04:00:30,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=320, Invalid=1012, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 04:00:30,047 INFO L87 Difference]: Start difference. First operand 21919 states and 56722 transitions. Second operand has 37 states, 37 states have (on average 3.2162162162162162) internal successors, (119), 36 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:30,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:00:30,918 INFO L93 Difference]: Finished difference Result 31459 states and 77242 transitions. [2021-06-05 04:00:30,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 04:00:30,919 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 3.2162162162162162) internal successors, (119), 36 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 04:00:30,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:00:30,955 INFO L225 Difference]: With dead ends: 31459 [2021-06-05 04:00:30,955 INFO L226 Difference]: Without dead ends: 31459 [2021-06-05 04:00:30,956 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 894 ImplicationChecksByTransitivity, 579.0ms TimeCoverageRelationStatistics Valid=1021, Invalid=2285, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 04:00:30,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31459 states. [2021-06-05 04:00:31,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31459 to 21939. [2021-06-05 04:00:31,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21939 states, 21938 states have (on average 2.5886133649375513) internal successors, (56789), 21938 states have internal predecessors, (56789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:31,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21939 states to 21939 states and 56789 transitions. [2021-06-05 04:00:31,302 INFO L78 Accepts]: Start accepts. Automaton has 21939 states and 56789 transitions. Word has length 65 [2021-06-05 04:00:31,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:00:31,303 INFO L482 AbstractCegarLoop]: Abstraction has 21939 states and 56789 transitions. [2021-06-05 04:00:31,303 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 3.2162162162162162) internal successors, (119), 36 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:31,303 INFO L276 IsEmpty]: Start isEmpty. Operand 21939 states and 56789 transitions. [2021-06-05 04:00:31,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 04:00:31,317 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:00:31,317 INFO L521 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:00:31,517 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1437,665 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:00:31,518 INFO L430 AbstractCegarLoop]: === Iteration 674 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:00:31,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:00:31,518 INFO L82 PathProgramCache]: Analyzing trace with hash 759015351, now seen corresponding path program 204 times [2021-06-05 04:00:31,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:00:31,518 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282521788] [2021-06-05 04:00:31,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:00:31,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:00:31,742 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 134 proven. 93 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:00:31,743 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:00:31,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282521788] [2021-06-05 04:00:31,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282521788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:31,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14587118] [2021-06-05 04:00:31,743 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 666 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 666 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:00:31,777 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2021-06-05 04:00:31,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:00:31,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:00:31,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:00:31,872 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 135 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:00:31,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14587118] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:31,873 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:00:31,873 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 19 [2021-06-05 04:00:31,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611008094] [2021-06-05 04:00:31,873 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:00:31,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:00:31,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:00:31,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=269, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:00:31,873 INFO L87 Difference]: Start difference. First operand 21939 states and 56789 transitions. Second operand has 20 states, 20 states have (on average 3.45) internal successors, (69), 19 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:32,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:00:32,402 INFO L93 Difference]: Finished difference Result 26303 states and 65783 transitions. [2021-06-05 04:00:32,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:00:32,404 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.45) internal successors, (69), 19 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 04:00:32,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:00:32,436 INFO L225 Difference]: With dead ends: 26303 [2021-06-05 04:00:32,436 INFO L226 Difference]: Without dead ends: 26303 [2021-06-05 04:00:32,436 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 263.0ms TimeCoverageRelationStatistics Valid=371, Invalid=685, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 04:00:32,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26303 states. [2021-06-05 04:00:32,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26303 to 21121. [2021-06-05 04:00:32,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21121 states, 21120 states have (on average 2.5846117424242423) internal successors, (54587), 21120 states have internal predecessors, (54587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:32,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21121 states to 21121 states and 54587 transitions. [2021-06-05 04:00:32,748 INFO L78 Accepts]: Start accepts. Automaton has 21121 states and 54587 transitions. Word has length 65 [2021-06-05 04:00:32,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:00:32,748 INFO L482 AbstractCegarLoop]: Abstraction has 21121 states and 54587 transitions. [2021-06-05 04:00:32,748 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.45) internal successors, (69), 19 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:32,749 INFO L276 IsEmpty]: Start isEmpty. Operand 21121 states and 54587 transitions. [2021-06-05 04:00:32,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 04:00:32,763 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:00:32,763 INFO L521 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:00:32,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 666 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1438 [2021-06-05 04:00:32,977 INFO L430 AbstractCegarLoop]: === Iteration 675 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:00:32,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:00:32,977 INFO L82 PathProgramCache]: Analyzing trace with hash 2028042391, now seen corresponding path program 412 times [2021-06-05 04:00:32,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:00:32,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567950196] [2021-06-05 04:00:32,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:00:32,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:00:33,118 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 84 proven. 143 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:00:33,118 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:00:33,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567950196] [2021-06-05 04:00:33,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567950196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:33,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391930125] [2021-06-05 04:00:33,118 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 667 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 667 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:00:33,146 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:00:33,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:00:33,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:00:33,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:00:33,234 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 84 proven. 143 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:00:33,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391930125] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:33,235 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:00:33,235 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-06-05 04:00:33,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541812147] [2021-06-05 04:00:33,235 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:00:33,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:00:33,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:00:33,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:00:33,235 INFO L87 Difference]: Start difference. First operand 21121 states and 54587 transitions. Second operand has 19 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 18 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:33,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:00:33,609 INFO L93 Difference]: Finished difference Result 25725 states and 62650 transitions. [2021-06-05 04:00:33,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:00:33,609 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 18 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 04:00:33,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:00:33,638 INFO L225 Difference]: With dead ends: 25725 [2021-06-05 04:00:33,638 INFO L226 Difference]: Without dead ends: 25662 [2021-06-05 04:00:33,638 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 199.4ms TimeCoverageRelationStatistics Valid=214, Invalid=488, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:00:33,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25662 states. [2021-06-05 04:00:33,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25662 to 21121. [2021-06-05 04:00:33,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21121 states, 21120 states have (on average 2.584185606060606) internal successors, (54578), 21120 states have internal predecessors, (54578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:33,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21121 states to 21121 states and 54578 transitions. [2021-06-05 04:00:33,939 INFO L78 Accepts]: Start accepts. Automaton has 21121 states and 54578 transitions. Word has length 65 [2021-06-05 04:00:33,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:00:33,939 INFO L482 AbstractCegarLoop]: Abstraction has 21121 states and 54578 transitions. [2021-06-05 04:00:33,939 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 18 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:33,939 INFO L276 IsEmpty]: Start isEmpty. Operand 21121 states and 54578 transitions. [2021-06-05 04:00:33,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 04:00:33,953 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:00:33,954 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:00:34,154 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1439,667 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:00:34,154 INFO L430 AbstractCegarLoop]: === Iteration 676 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:00:34,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:00:34,154 INFO L82 PathProgramCache]: Analyzing trace with hash 407999270, now seen corresponding path program 205 times [2021-06-05 04:00:34,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:00:34,154 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335233844] [2021-06-05 04:00:34,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:00:34,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:00:34,254 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 10 proven. 213 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:00:34,254 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:00:34,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335233844] [2021-06-05 04:00:34,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335233844] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:34,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020171730] [2021-06-05 04:00:34,254 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 668 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 668 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:00:34,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:00:34,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:00:34,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:00:34,374 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 9 proven. 214 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:00:34,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020171730] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:34,375 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:00:34,375 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 04:00:34,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129269819] [2021-06-05 04:00:34,375 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:00:34,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:00:34,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:00:34,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:00:34,375 INFO L87 Difference]: Start difference. First operand 21121 states and 54578 transitions. Second operand has 13 states, 13 states have (on average 5.0) internal successors, (65), 12 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:35,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:00:35,058 INFO L93 Difference]: Finished difference Result 23217 states and 58673 transitions. [2021-06-05 04:00:35,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:00:35,058 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.0) internal successors, (65), 12 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 04:00:35,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:00:35,084 INFO L225 Difference]: With dead ends: 23217 [2021-06-05 04:00:35,084 INFO L226 Difference]: Without dead ends: 23202 [2021-06-05 04:00:35,084 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 163.1ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:00:35,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23202 states. [2021-06-05 04:00:35,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23202 to 21457. [2021-06-05 04:00:35,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21457 states, 21456 states have (on average 2.580723340790455) internal successors, (55372), 21456 states have internal predecessors, (55372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:35,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21457 states to 21457 states and 55372 transitions. [2021-06-05 04:00:35,364 INFO L78 Accepts]: Start accepts. Automaton has 21457 states and 55372 transitions. Word has length 65 [2021-06-05 04:00:35,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:00:35,364 INFO L482 AbstractCegarLoop]: Abstraction has 21457 states and 55372 transitions. [2021-06-05 04:00:35,364 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.0) internal successors, (65), 12 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:35,364 INFO L276 IsEmpty]: Start isEmpty. Operand 21457 states and 55372 transitions. [2021-06-05 04:00:35,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 04:00:35,378 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:00:35,378 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:00:35,579 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1448,668 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:00:35,579 INFO L430 AbstractCegarLoop]: === Iteration 677 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:00:35,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:00:35,579 INFO L82 PathProgramCache]: Analyzing trace with hash 1908332262, now seen corresponding path program 413 times [2021-06-05 04:00:35,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:00:35,579 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472989178] [2021-06-05 04:00:35,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:00:35,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:00:35,675 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 22 proven. 201 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:00:35,675 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:00:35,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472989178] [2021-06-05 04:00:35,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472989178] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:35,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670942559] [2021-06-05 04:00:35,676 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 669 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 669 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:00:35,710 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-06-05 04:00:35,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:00:35,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:00:35,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:00:35,808 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 17 proven. 206 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:00:35,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670942559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:35,808 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:00:35,808 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 04:00:35,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569141815] [2021-06-05 04:00:35,808 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:00:35,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:00:35,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:00:35,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:00:35,809 INFO L87 Difference]: Start difference. First operand 21457 states and 55372 transitions. Second operand has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 12 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:36,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:00:36,745 INFO L93 Difference]: Finished difference Result 22759 states and 57640 transitions. [2021-06-05 04:00:36,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:00:36,746 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 12 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 04:00:36,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:00:36,770 INFO L225 Difference]: With dead ends: 22759 [2021-06-05 04:00:36,770 INFO L226 Difference]: Without dead ends: 22613 [2021-06-05 04:00:36,771 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 165.8ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:00:36,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22613 states. [2021-06-05 04:00:36,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22613 to 21545. [2021-06-05 04:00:37,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21545 states, 21544 states have (on average 2.5720850352766433) internal successors, (55413), 21544 states have internal predecessors, (55413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:37,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21545 states to 21545 states and 55413 transitions. [2021-06-05 04:00:37,057 INFO L78 Accepts]: Start accepts. Automaton has 21545 states and 55413 transitions. Word has length 65 [2021-06-05 04:00:37,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:00:37,057 INFO L482 AbstractCegarLoop]: Abstraction has 21545 states and 55413 transitions. [2021-06-05 04:00:37,057 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 12 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:37,057 INFO L276 IsEmpty]: Start isEmpty. Operand 21545 states and 55413 transitions. [2021-06-05 04:00:37,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 04:00:37,072 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:00:37,072 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:00:37,273 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 669 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1449 [2021-06-05 04:00:37,273 INFO L430 AbstractCegarLoop]: === Iteration 678 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:00:37,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:00:37,273 INFO L82 PathProgramCache]: Analyzing trace with hash 1294796082, now seen corresponding path program 414 times [2021-06-05 04:00:37,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:00:37,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503709522] [2021-06-05 04:00:37,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:00:37,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:00:37,372 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 19 proven. 202 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 04:00:37,372 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:00:37,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503709522] [2021-06-05 04:00:37,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503709522] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:37,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399841249] [2021-06-05 04:00:37,372 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 670 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 670 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:00:37,404 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-06-05 04:00:37,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:00:37,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:00:37,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:00:37,493 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 203 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 04:00:37,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399841249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:37,493 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:00:37,493 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 04:00:37,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511141260] [2021-06-05 04:00:37,493 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:00:37,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:00:37,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:00:37,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:00:37,493 INFO L87 Difference]: Start difference. First operand 21545 states and 55413 transitions. Second operand has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:38,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:00:38,100 INFO L93 Difference]: Finished difference Result 23561 states and 59381 transitions. [2021-06-05 04:00:38,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:00:38,100 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 04:00:38,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:00:38,125 INFO L225 Difference]: With dead ends: 23561 [2021-06-05 04:00:38,126 INFO L226 Difference]: Without dead ends: 23549 [2021-06-05 04:00:38,126 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 159.9ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:00:38,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23549 states. [2021-06-05 04:00:38,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23549 to 21713. [2021-06-05 04:00:38,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21713 states, 21712 states have (on average 2.5719878408253503) internal successors, (55843), 21712 states have internal predecessors, (55843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:38,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21713 states to 21713 states and 55843 transitions. [2021-06-05 04:00:38,429 INFO L78 Accepts]: Start accepts. Automaton has 21713 states and 55843 transitions. Word has length 65 [2021-06-05 04:00:38,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:00:38,429 INFO L482 AbstractCegarLoop]: Abstraction has 21713 states and 55843 transitions. [2021-06-05 04:00:38,429 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:38,429 INFO L276 IsEmpty]: Start isEmpty. Operand 21713 states and 55843 transitions. [2021-06-05 04:00:38,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 04:00:38,444 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:00:38,444 INFO L521 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:00:38,659 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1450,670 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:00:38,659 INFO L430 AbstractCegarLoop]: === Iteration 679 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:00:38,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:00:38,660 INFO L82 PathProgramCache]: Analyzing trace with hash -353561421, now seen corresponding path program 415 times [2021-06-05 04:00:38,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:00:38,660 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917026071] [2021-06-05 04:00:38,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:00:38,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:00:38,735 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 79 proven. 146 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:00:38,735 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:00:38,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917026071] [2021-06-05 04:00:38,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917026071] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:38,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688035100] [2021-06-05 04:00:38,736 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 671 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 671 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:00:38,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:00:38,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:00:38,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:00:38,846 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 79 proven. 146 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:00:38,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688035100] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:38,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:00:38,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-06-05 04:00:38,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907631349] [2021-06-05 04:00:38,847 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:00:38,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:00:38,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:00:38,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:00:38,847 INFO L87 Difference]: Start difference. First operand 21713 states and 55843 transitions. Second operand has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:39,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:00:39,056 INFO L93 Difference]: Finished difference Result 26875 states and 64939 transitions. [2021-06-05 04:00:39,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:00:39,057 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 04:00:39,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:00:39,087 INFO L225 Difference]: With dead ends: 26875 [2021-06-05 04:00:39,087 INFO L226 Difference]: Without dead ends: 26857 [2021-06-05 04:00:39,087 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 82.9ms TimeCoverageRelationStatistics Valid=99, Invalid=141, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:00:39,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26857 states. [2021-06-05 04:00:39,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26857 to 21701. [2021-06-05 04:00:39,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21701 states, 21700 states have (on average 2.5707834101382487) internal successors, (55786), 21700 states have internal predecessors, (55786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:39,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21701 states to 21701 states and 55786 transitions. [2021-06-05 04:00:39,422 INFO L78 Accepts]: Start accepts. Automaton has 21701 states and 55786 transitions. Word has length 65 [2021-06-05 04:00:39,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:00:39,422 INFO L482 AbstractCegarLoop]: Abstraction has 21701 states and 55786 transitions. [2021-06-05 04:00:39,422 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:39,422 INFO L276 IsEmpty]: Start isEmpty. Operand 21701 states and 55786 transitions. [2021-06-05 04:00:39,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 04:00:39,437 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:00:39,437 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:00:39,637 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1451,671 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:00:39,637 INFO L430 AbstractCegarLoop]: === Iteration 680 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:00:39,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:00:39,638 INFO L82 PathProgramCache]: Analyzing trace with hash -858253880, now seen corresponding path program 416 times [2021-06-05 04:00:39,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:00:39,638 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124384996] [2021-06-05 04:00:39,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:00:39,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:00:39,738 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 19 proven. 204 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:00:39,738 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:00:39,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124384996] [2021-06-05 04:00:39,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124384996] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:39,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151370977] [2021-06-05 04:00:39,738 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 672 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 672 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:00:39,765 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:00:39,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:00:39,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:00:39,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:00:39,852 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 205 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:00:39,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151370977] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:39,852 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:00:39,852 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 04:00:39,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715944072] [2021-06-05 04:00:39,852 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:00:39,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:00:39,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:00:39,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:00:39,853 INFO L87 Difference]: Start difference. First operand 21701 states and 55786 transitions. Second operand has 14 states, 14 states have (on average 4.642857142857143) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:40,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:00:40,866 INFO L93 Difference]: Finished difference Result 26110 states and 65034 transitions. [2021-06-05 04:00:40,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 04:00:40,866 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.642857142857143) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 04:00:40,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:00:40,892 INFO L225 Difference]: With dead ends: 26110 [2021-06-05 04:00:40,893 INFO L226 Difference]: Without dead ends: 26056 [2021-06-05 04:00:40,893 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 70 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 300.4ms TimeCoverageRelationStatistics Valid=147, Invalid=1185, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 04:00:40,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26056 states. [2021-06-05 04:00:41,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26056 to 22216. [2021-06-05 04:00:41,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22216 states, 22215 states have (on average 2.574476704929102) internal successors, (57192), 22215 states have internal predecessors, (57192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:41,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22216 states to 22216 states and 57192 transitions. [2021-06-05 04:00:41,184 INFO L78 Accepts]: Start accepts. Automaton has 22216 states and 57192 transitions. Word has length 65 [2021-06-05 04:00:41,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:00:41,184 INFO L482 AbstractCegarLoop]: Abstraction has 22216 states and 57192 transitions. [2021-06-05 04:00:41,184 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.642857142857143) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:41,185 INFO L276 IsEmpty]: Start isEmpty. Operand 22216 states and 57192 transitions. [2021-06-05 04:00:41,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 04:00:41,198 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:00:41,198 INFO L521 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:00:41,399 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 672 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1454 [2021-06-05 04:00:41,399 INFO L430 AbstractCegarLoop]: === Iteration 681 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:00:41,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:00:41,399 INFO L82 PathProgramCache]: Analyzing trace with hash 674305229, now seen corresponding path program 417 times [2021-06-05 04:00:41,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:00:41,399 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013487163] [2021-06-05 04:00:41,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:00:41,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:00:41,483 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 73 proven. 153 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:00:41,483 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:00:41,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013487163] [2021-06-05 04:00:41,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013487163] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:41,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118096637] [2021-06-05 04:00:41,483 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 673 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 673 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:00:41,516 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-06-05 04:00:41,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:00:41,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:00:41,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:00:41,602 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 73 proven. 153 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:00:41,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118096637] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:41,602 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:00:41,602 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-06-05 04:00:41,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747193721] [2021-06-05 04:00:41,602 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:00:41,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:00:41,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:00:41,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:00:41,602 INFO L87 Difference]: Start difference. First operand 22216 states and 57192 transitions. Second operand has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 13 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:41,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:00:41,838 INFO L93 Difference]: Finished difference Result 27492 states and 66503 transitions. [2021-06-05 04:00:41,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:00:41,838 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 13 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 04:00:41,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:00:41,867 INFO L225 Difference]: With dead ends: 27492 [2021-06-05 04:00:41,868 INFO L226 Difference]: Without dead ends: 27468 [2021-06-05 04:00:41,868 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 92.2ms TimeCoverageRelationStatistics Valid=102, Invalid=170, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:00:41,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27468 states. [2021-06-05 04:00:42,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27468 to 22216. [2021-06-05 04:00:42,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22216 states, 22215 states have (on average 2.573666441593518) internal successors, (57174), 22215 states have internal predecessors, (57174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:42,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22216 states to 22216 states and 57174 transitions. [2021-06-05 04:00:42,177 INFO L78 Accepts]: Start accepts. Automaton has 22216 states and 57174 transitions. Word has length 65 [2021-06-05 04:00:42,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:00:42,177 INFO L482 AbstractCegarLoop]: Abstraction has 22216 states and 57174 transitions. [2021-06-05 04:00:42,177 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 13 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:42,177 INFO L276 IsEmpty]: Start isEmpty. Operand 22216 states and 57174 transitions. [2021-06-05 04:00:42,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 04:00:42,192 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:00:42,192 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:00:42,392 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1455,673 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:00:42,392 INFO L430 AbstractCegarLoop]: === Iteration 682 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:00:42,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:00:42,393 INFO L82 PathProgramCache]: Analyzing trace with hash -703417346, now seen corresponding path program 418 times [2021-06-05 04:00:42,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:00:42,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953688941] [2021-06-05 04:00:42,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:00:42,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:00:42,512 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 19 proven. 204 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:00:42,513 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:00:42,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953688941] [2021-06-05 04:00:42,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953688941] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:42,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393215562] [2021-06-05 04:00:42,513 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 674 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 674 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:00:42,541 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:00:42,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:00:42,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:00:42,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:00:42,628 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 205 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:00:42,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393215562] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:42,628 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:00:42,628 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 04:00:42,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354978115] [2021-06-05 04:00:42,629 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:00:42,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:00:42,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:00:42,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:00:42,629 INFO L87 Difference]: Start difference. First operand 22216 states and 57174 transitions. Second operand has 15 states, 15 states have (on average 4.333333333333333) internal successors, (65), 14 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:44,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:00:44,108 INFO L93 Difference]: Finished difference Result 31885 states and 78097 transitions. [2021-06-05 04:00:44,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-05 04:00:44,108 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.333333333333333) internal successors, (65), 14 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 04:00:44,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:00:44,145 INFO L225 Difference]: With dead ends: 31885 [2021-06-05 04:00:44,145 INFO L226 Difference]: Without dead ends: 31717 [2021-06-05 04:00:44,146 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 69 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1274 ImplicationChecksByTransitivity, 617.2ms TimeCoverageRelationStatistics Valid=381, Invalid=3779, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 04:00:44,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31717 states. [2021-06-05 04:00:44,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31717 to 23319. [2021-06-05 04:00:44,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23319 states, 23318 states have (on average 2.576636075135089) internal successors, (60082), 23318 states have internal predecessors, (60082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:44,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23319 states to 23319 states and 60082 transitions. [2021-06-05 04:00:44,525 INFO L78 Accepts]: Start accepts. Automaton has 23319 states and 60082 transitions. Word has length 65 [2021-06-05 04:00:44,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:00:44,525 INFO L482 AbstractCegarLoop]: Abstraction has 23319 states and 60082 transitions. [2021-06-05 04:00:44,525 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.333333333333333) internal successors, (65), 14 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:44,525 INFO L276 IsEmpty]: Start isEmpty. Operand 23319 states and 60082 transitions. [2021-06-05 04:00:44,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 04:00:44,544 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:00:44,544 INFO L521 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:00:44,744 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 674 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1459 [2021-06-05 04:00:44,745 INFO L430 AbstractCegarLoop]: === Iteration 683 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:00:44,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:00:44,745 INFO L82 PathProgramCache]: Analyzing trace with hash -316814669, now seen corresponding path program 419 times [2021-06-05 04:00:44,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:00:44,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333079190] [2021-06-05 04:00:44,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:00:44,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:00:44,838 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 62 proven. 164 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:00:44,839 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:00:44,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333079190] [2021-06-05 04:00:44,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333079190] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:44,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180937991] [2021-06-05 04:00:44,839 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 675 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 675 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:00:44,870 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-06-05 04:00:44,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:00:44,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:00:44,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:00:45,076 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 63 proven. 164 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:00:45,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180937991] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:45,077 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:00:45,077 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 18 [2021-06-05 04:00:45,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900635840] [2021-06-05 04:00:45,077 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:00:45,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:00:45,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:00:45,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:00:45,077 INFO L87 Difference]: Start difference. First operand 23319 states and 60082 transitions. Second operand has 19 states, 19 states have (on average 4.2631578947368425) internal successors, (81), 18 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:45,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:00:45,363 INFO L93 Difference]: Finished difference Result 29012 states and 70223 transitions. [2021-06-05 04:00:45,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:00:45,363 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.2631578947368425) internal successors, (81), 18 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 04:00:45,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:00:45,397 INFO L225 Difference]: With dead ends: 29012 [2021-06-05 04:00:45,397 INFO L226 Difference]: Without dead ends: 28979 [2021-06-05 04:00:45,397 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 142.6ms TimeCoverageRelationStatistics Valid=156, Invalid=350, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:00:45,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28979 states. [2021-06-05 04:00:45,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28979 to 23319. [2021-06-05 04:00:45,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23319 states, 23318 states have (on average 2.5762501072133115) internal successors, (60073), 23318 states have internal predecessors, (60073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:45,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23319 states to 23319 states and 60073 transitions. [2021-06-05 04:00:45,738 INFO L78 Accepts]: Start accepts. Automaton has 23319 states and 60073 transitions. Word has length 65 [2021-06-05 04:00:45,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:00:45,738 INFO L482 AbstractCegarLoop]: Abstraction has 23319 states and 60073 transitions. [2021-06-05 04:00:45,738 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.2631578947368425) internal successors, (81), 18 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:45,738 INFO L276 IsEmpty]: Start isEmpty. Operand 23319 states and 60073 transitions. [2021-06-05 04:00:45,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 04:00:45,753 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:00:45,753 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:00:45,953 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1460,675 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:00:45,954 INFO L430 AbstractCegarLoop]: === Iteration 684 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:00:45,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:00:45,954 INFO L82 PathProgramCache]: Analyzing trace with hash -763108856, now seen corresponding path program 420 times [2021-06-05 04:00:45,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:00:45,954 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76801755] [2021-06-05 04:00:45,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:00:45,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:00:46,075 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 19 proven. 204 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:00:46,075 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:00:46,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76801755] [2021-06-05 04:00:46,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76801755] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:46,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310007876] [2021-06-05 04:00:46,075 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 676 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 676 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:00:46,107 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-06-05 04:00:46,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:00:46,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:00:46,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:00:46,495 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 04:00:46,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 16 [2021-06-05 04:00:46,496 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:00:46,503 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:00:46,503 INFO L518 ElimStorePlain]: Eliminatee B vanished before elimination [2021-06-05 04:00:46,504 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:00:46,504 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:32, output treesize:19 [2021-06-05 04:00:46,537 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 89 proven. 134 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:00:46,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310007876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:46,537 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:00:46,537 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 31 [2021-06-05 04:00:46,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781060124] [2021-06-05 04:00:46,538 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 04:00:46,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:00:46,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 04:00:46,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=840, Unknown=0, NotChecked=0, Total=992 [2021-06-05 04:00:46,538 INFO L87 Difference]: Start difference. First operand 23319 states and 60073 transitions. Second operand has 32 states, 32 states have (on average 3.78125) internal successors, (121), 31 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:53,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:00:53,027 INFO L93 Difference]: Finished difference Result 59239 states and 136732 transitions. [2021-06-05 04:00:53,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 248 states. [2021-06-05 04:00:53,027 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.78125) internal successors, (121), 31 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 04:00:53,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:00:53,101 INFO L225 Difference]: With dead ends: 59239 [2021-06-05 04:00:53,101 INFO L226 Difference]: Without dead ends: 58649 [2021-06-05 04:00:53,104 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 250 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25814 ImplicationChecksByTransitivity, 4609.1ms TimeCoverageRelationStatistics Valid=3924, Invalid=59328, Unknown=0, NotChecked=0, Total=63252 [2021-06-05 04:00:53,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58649 states. [2021-06-05 04:00:53,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58649 to 25834. [2021-06-05 04:00:53,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25834 states, 25833 states have (on average 2.587659195602524) internal successors, (66847), 25833 states have internal predecessors, (66847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:53,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25834 states to 25834 states and 66847 transitions. [2021-06-05 04:00:53,679 INFO L78 Accepts]: Start accepts. Automaton has 25834 states and 66847 transitions. Word has length 65 [2021-06-05 04:00:53,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:00:53,679 INFO L482 AbstractCegarLoop]: Abstraction has 25834 states and 66847 transitions. [2021-06-05 04:00:53,679 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 3.78125) internal successors, (121), 31 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:53,679 INFO L276 IsEmpty]: Start isEmpty. Operand 25834 states and 66847 transitions. [2021-06-05 04:00:53,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 04:00:53,695 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:00:53,695 INFO L521 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:00:53,895 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 676 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1465 [2021-06-05 04:00:53,896 INFO L430 AbstractCegarLoop]: === Iteration 685 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:00:53,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:00:53,896 INFO L82 PathProgramCache]: Analyzing trace with hash 1130464013, now seen corresponding path program 421 times [2021-06-05 04:00:53,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:00:53,896 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207057689] [2021-06-05 04:00:53,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:00:53,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:00:53,999 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 57 proven. 169 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:00:53,999 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:00:53,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207057689] [2021-06-05 04:00:53,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207057689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:53,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928158526] [2021-06-05 04:00:53,999 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 677 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 677 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:00:54,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:00:54,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:00:54,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:00:54,115 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 57 proven. 169 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:00:54,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928158526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:54,115 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:00:54,115 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-06-05 04:00:54,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588189993] [2021-06-05 04:00:54,115 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:00:54,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:00:54,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:00:54,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:00:54,116 INFO L87 Difference]: Start difference. First operand 25834 states and 66847 transitions. Second operand has 16 states, 16 states have (on average 4.0) internal successors, (64), 15 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:54,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:00:54,388 INFO L93 Difference]: Finished difference Result 31663 states and 77216 transitions. [2021-06-05 04:00:54,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:00:54,389 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.0) internal successors, (64), 15 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 04:00:54,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:00:54,426 INFO L225 Difference]: With dead ends: 31663 [2021-06-05 04:00:54,426 INFO L226 Difference]: Without dead ends: 31621 [2021-06-05 04:00:54,426 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 121.3ms TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:00:54,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31621 states. [2021-06-05 04:00:54,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31621 to 25834. [2021-06-05 04:00:54,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25834 states, 25833 states have (on average 2.5873108040103743) internal successors, (66838), 25833 states have internal predecessors, (66838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:54,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25834 states to 25834 states and 66838 transitions. [2021-06-05 04:00:54,855 INFO L78 Accepts]: Start accepts. Automaton has 25834 states and 66838 transitions. Word has length 65 [2021-06-05 04:00:54,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:00:54,855 INFO L482 AbstractCegarLoop]: Abstraction has 25834 states and 66838 transitions. [2021-06-05 04:00:54,855 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.0) internal successors, (64), 15 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:54,856 INFO L276 IsEmpty]: Start isEmpty. Operand 25834 states and 66838 transitions. [2021-06-05 04:00:54,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 04:00:54,870 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:00:54,870 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:00:55,070 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 677 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1468 [2021-06-05 04:00:55,070 INFO L430 AbstractCegarLoop]: === Iteration 686 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:00:55,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:00:55,070 INFO L82 PathProgramCache]: Analyzing trace with hash -916422722, now seen corresponding path program 422 times [2021-06-05 04:00:55,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:00:55,070 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642493173] [2021-06-05 04:00:55,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:00:55,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:00:55,202 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 19 proven. 204 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:00:55,202 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:00:55,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642493173] [2021-06-05 04:00:55,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642493173] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:55,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610946989] [2021-06-05 04:00:55,202 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 678 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 678 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:00:55,229 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:00:55,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:00:55,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:00:55,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:00:55,316 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 205 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:00:55,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610946989] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:55,316 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:00:55,317 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-06-05 04:00:55,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670960545] [2021-06-05 04:00:55,317 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:00:55,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:00:55,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:00:55,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:00:55,317 INFO L87 Difference]: Start difference. First operand 25834 states and 66838 transitions. Second operand has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 16 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:59,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:00:59,218 INFO L93 Difference]: Finished difference Result 71126 states and 168440 transitions. [2021-06-05 04:00:59,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 193 states. [2021-06-05 04:00:59,218 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 16 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 04:00:59,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:00:59,307 INFO L225 Difference]: With dead ends: 71126 [2021-06-05 04:00:59,307 INFO L226 Difference]: Without dead ends: 69986 [2021-06-05 04:00:59,310 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15591 ImplicationChecksByTransitivity, 2620.9ms TimeCoverageRelationStatistics Valid=2433, Invalid=34623, Unknown=0, NotChecked=0, Total=37056 [2021-06-05 04:00:59,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69986 states. [2021-06-05 04:00:59,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69986 to 29289. [2021-06-05 04:00:59,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29289 states, 29288 states have (on average 2.5868615132477464) internal successors, (75764), 29288 states have internal predecessors, (75764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:00,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29289 states to 29289 states and 75764 transitions. [2021-06-05 04:01:00,013 INFO L78 Accepts]: Start accepts. Automaton has 29289 states and 75764 transitions. Word has length 65 [2021-06-05 04:01:00,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:01:00,013 INFO L482 AbstractCegarLoop]: Abstraction has 29289 states and 75764 transitions. [2021-06-05 04:01:00,013 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 16 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:00,013 INFO L276 IsEmpty]: Start isEmpty. Operand 29289 states and 75764 transitions. [2021-06-05 04:01:00,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 04:01:00,028 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:01:00,028 INFO L521 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:01:00,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 678 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1474 [2021-06-05 04:01:00,229 INFO L430 AbstractCegarLoop]: === Iteration 687 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:01:00,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:01:00,229 INFO L82 PathProgramCache]: Analyzing trace with hash -167005069, now seen corresponding path program 423 times [2021-06-05 04:01:00,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:01:00,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279471844] [2021-06-05 04:01:00,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:01:00,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:01:00,342 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 58 proven. 168 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:01:00,343 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:01:00,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279471844] [2021-06-05 04:01:00,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279471844] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:01:00,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217894571] [2021-06-05 04:01:00,343 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 679 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 679 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:01:00,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-06-05 04:01:00,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:01:00,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:01:00,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:01:00,461 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 58 proven. 168 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:01:00,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217894571] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:01:00,461 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:01:00,461 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2021-06-05 04:01:00,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158285751] [2021-06-05 04:01:00,462 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:01:00,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:01:00,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:01:00,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:01:00,462 INFO L87 Difference]: Start difference. First operand 29289 states and 75764 transitions. Second operand has 17 states, 17 states have (on average 3.764705882352941) internal successors, (64), 16 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:00,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:01:00,818 INFO L93 Difference]: Finished difference Result 35769 states and 87381 transitions. [2021-06-05 04:01:00,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:01:00,818 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.764705882352941) internal successors, (64), 16 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 04:01:00,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:01:00,860 INFO L225 Difference]: With dead ends: 35769 [2021-06-05 04:01:00,860 INFO L226 Difference]: Without dead ends: 35718 [2021-06-05 04:01:00,860 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 141.6ms TimeCoverageRelationStatistics Valid=147, Invalid=315, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:01:00,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35718 states. [2021-06-05 04:01:01,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35718 to 29289. [2021-06-05 04:01:01,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29289 states, 29288 states have (on average 2.5865542201584266) internal successors, (75755), 29288 states have internal predecessors, (75755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:01,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29289 states to 29289 states and 75755 transitions. [2021-06-05 04:01:01,322 INFO L78 Accepts]: Start accepts. Automaton has 29289 states and 75755 transitions. Word has length 65 [2021-06-05 04:01:01,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:01:01,322 INFO L482 AbstractCegarLoop]: Abstraction has 29289 states and 75755 transitions. [2021-06-05 04:01:01,323 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.764705882352941) internal successors, (64), 16 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:01,323 INFO L276 IsEmpty]: Start isEmpty. Operand 29289 states and 75755 transitions. [2021-06-05 04:01:01,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 04:01:01,338 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:01:01,338 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:01:01,538 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 679 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1475 [2021-06-05 04:01:01,538 INFO L430 AbstractCegarLoop]: === Iteration 688 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:01:01,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:01:01,538 INFO L82 PathProgramCache]: Analyzing trace with hash 1555398216, now seen corresponding path program 424 times [2021-06-05 04:01:01,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:01:01,538 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096535324] [2021-06-05 04:01:01,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:01:01,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:01:01,682 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 19 proven. 204 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:01:01,682 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:01:01,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096535324] [2021-06-05 04:01:01,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096535324] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:01:01,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401778739] [2021-06-05 04:01:01,682 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 680 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 680 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:01:01,709 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:01:01,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:01:01,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:01:01,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:01:01,794 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 205 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:01:01,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401778739] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:01:01,794 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:01:01,794 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2021-06-05 04:01:01,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359260564] [2021-06-05 04:01:01,795 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:01:01,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:01:01,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:01:01,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:01:01,795 INFO L87 Difference]: Start difference. First operand 29289 states and 75755 transitions. Second operand has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:08,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:01:08,589 INFO L93 Difference]: Finished difference Result 133248 states and 309294 transitions. [2021-06-05 04:01:08,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 321 states. [2021-06-05 04:01:08,589 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 04:01:08,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:01:08,773 INFO L225 Difference]: With dead ends: 133248 [2021-06-05 04:01:08,773 INFO L226 Difference]: Without dead ends: 129774 [2021-06-05 04:01:08,779 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 387 GetRequests, 66 SyntacticMatches, 2 SemanticMatches, 319 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46200 ImplicationChecksByTransitivity, 5258.1ms TimeCoverageRelationStatistics Valid=5835, Invalid=96885, Unknown=0, NotChecked=0, Total=102720 [2021-06-05 04:01:08,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129774 states. [2021-06-05 04:01:09,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129774 to 34615. [2021-06-05 04:01:09,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34615 states, 34614 states have (on average 2.584618940313168) internal successors, (89464), 34614 states have internal predecessors, (89464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:09,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34615 states to 34615 states and 89464 transitions. [2021-06-05 04:01:09,927 INFO L78 Accepts]: Start accepts. Automaton has 34615 states and 89464 transitions. Word has length 65 [2021-06-05 04:01:09,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:01:09,927 INFO L482 AbstractCegarLoop]: Abstraction has 34615 states and 89464 transitions. [2021-06-05 04:01:09,927 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:09,927 INFO L276 IsEmpty]: Start isEmpty. Operand 34615 states and 89464 transitions. [2021-06-05 04:01:09,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 04:01:09,943 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:01:09,943 INFO L521 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:01:10,143 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1482,680 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:01:10,143 INFO L430 AbstractCegarLoop]: === Iteration 689 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:01:10,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:01:10,144 INFO L82 PathProgramCache]: Analyzing trace with hash 1637237069, now seen corresponding path program 425 times [2021-06-05 04:01:10,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:01:10,144 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263152924] [2021-06-05 04:01:10,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:01:10,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:01:10,589 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 65 proven. 161 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:01:10,589 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:01:10,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263152924] [2021-06-05 04:01:10,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263152924] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:01:10,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783649113] [2021-06-05 04:01:10,589 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 681 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 681 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:01:10,620 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-06-05 04:01:10,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:01:10,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:01:10,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:01:10,741 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 65 proven. 161 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:01:10,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783649113] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:01:10,741 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:01:10,741 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 21 [2021-06-05 04:01:10,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031464541] [2021-06-05 04:01:10,742 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:01:10,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:01:10,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:01:10,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:01:10,742 INFO L87 Difference]: Start difference. First operand 34615 states and 89464 transitions. Second operand has 22 states, 22 states have (on average 3.6818181818181817) internal successors, (81), 21 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:11,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:01:11,361 INFO L93 Difference]: Finished difference Result 42327 states and 103472 transitions. [2021-06-05 04:01:11,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:01:11,361 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.6818181818181817) internal successors, (81), 21 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 04:01:11,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:01:11,454 INFO L225 Difference]: With dead ends: 42327 [2021-06-05 04:01:11,454 INFO L226 Difference]: Without dead ends: 42267 [2021-06-05 04:01:11,454 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 527.8ms TimeCoverageRelationStatistics Valid=201, Invalid=555, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:01:11,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42267 states. [2021-06-05 04:01:11,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42267 to 34615. [2021-06-05 04:01:11,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34615 states, 34614 states have (on average 2.584358929912752) internal successors, (89455), 34614 states have internal predecessors, (89455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:12,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34615 states to 34615 states and 89455 transitions. [2021-06-05 04:01:12,049 INFO L78 Accepts]: Start accepts. Automaton has 34615 states and 89455 transitions. Word has length 65 [2021-06-05 04:01:12,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:01:12,049 INFO L482 AbstractCegarLoop]: Abstraction has 34615 states and 89455 transitions. [2021-06-05 04:01:12,049 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.6818181818181817) internal successors, (81), 21 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:12,049 INFO L276 IsEmpty]: Start isEmpty. Operand 34615 states and 89455 transitions. [2021-06-05 04:01:12,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 04:01:12,064 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:01:12,064 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:01:12,264 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1483,681 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:01:12,264 INFO L430 AbstractCegarLoop]: === Iteration 690 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:01:12,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:01:12,264 INFO L82 PathProgramCache]: Analyzing trace with hash -1936295042, now seen corresponding path program 426 times [2021-06-05 04:01:12,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:01:12,264 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999783384] [2021-06-05 04:01:12,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:01:12,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:01:12,430 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 19 proven. 204 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:01:12,431 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:01:12,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999783384] [2021-06-05 04:01:12,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999783384] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:01:12,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464953926] [2021-06-05 04:01:12,431 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 682 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 682 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:01:12,491 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-06-05 04:01:12,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:01:12,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:01:12,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:01:13,093 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 04:01:13,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 16 [2021-06-05 04:01:13,095 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:01:13,102 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:01:13,102 INFO L518 ElimStorePlain]: Eliminatee B vanished before elimination [2021-06-05 04:01:13,102 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:01:13,103 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:32, output treesize:19 [2021-06-05 04:01:13,140 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 77 proven. 146 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:01:13,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464953926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:01:13,140 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:01:13,140 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 20] total 37 [2021-06-05 04:01:13,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853411756] [2021-06-05 04:01:13,140 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 04:01:13,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:01:13,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 04:01:13,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1221, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 04:01:13,141 INFO L87 Difference]: Start difference. First operand 34615 states and 89455 transitions. Second operand has 38 states, 38 states have (on average 3.1842105263157894) internal successors, (121), 37 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:43,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:01:43,474 INFO L93 Difference]: Finished difference Result 184574 states and 428104 transitions. [2021-06-05 04:01:43,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 842 states. [2021-06-05 04:01:43,474 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.1842105263157894) internal successors, (121), 37 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 04:01:43,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:01:43,742 INFO L225 Difference]: With dead ends: 184574 [2021-06-05 04:01:43,742 INFO L226 Difference]: Without dead ends: 180939 [2021-06-05 04:01:43,767 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 892 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 844 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336604 ImplicationChecksByTransitivity, 26710.9ms TimeCoverageRelationStatistics Valid=28700, Invalid=686170, Unknown=0, NotChecked=0, Total=714870 [2021-06-05 04:01:43,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180939 states. [2021-06-05 04:01:45,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180939 to 39214. [2021-06-05 04:01:45,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39214 states, 39213 states have (on average 2.579552699359906) internal successors, (101152), 39213 states have internal predecessors, (101152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:45,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39214 states to 39214 states and 101152 transitions. [2021-06-05 04:01:45,522 INFO L78 Accepts]: Start accepts. Automaton has 39214 states and 101152 transitions. Word has length 65 [2021-06-05 04:01:45,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:01:45,522 INFO L482 AbstractCegarLoop]: Abstraction has 39214 states and 101152 transitions. [2021-06-05 04:01:45,522 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 3.1842105263157894) internal successors, (121), 37 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:45,522 INFO L276 IsEmpty]: Start isEmpty. Operand 39214 states and 101152 transitions. [2021-06-05 04:01:45,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 04:01:45,539 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:01:45,539 INFO L521 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:01:45,739 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1491,682 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:01:45,739 INFO L430 AbstractCegarLoop]: === Iteration 691 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:01:45,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:01:45,740 INFO L82 PathProgramCache]: Analyzing trace with hash 299060787, now seen corresponding path program 427 times [2021-06-05 04:01:45,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:01:45,740 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100516707] [2021-06-05 04:01:45,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:01:45,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:01:45,877 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 78 proven. 148 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:01:45,877 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:01:45,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100516707] [2021-06-05 04:01:45,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100516707] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:01:45,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231830567] [2021-06-05 04:01:45,877 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 683 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 683 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:01:45,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:01:45,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:01:45,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:01:45,992 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 78 proven. 148 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:01:45,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231830567] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:01:45,993 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:01:45,993 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-06-05 04:01:45,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100128098] [2021-06-05 04:01:45,993 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:01:45,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:01:45,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:01:45,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:01:45,993 INFO L87 Difference]: Start difference. First operand 39214 states and 101152 transitions. Second operand has 19 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 18 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:46,302 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2021-06-05 04:01:46,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:01:46,484 INFO L93 Difference]: Finished difference Result 47031 states and 115378 transitions. [2021-06-05 04:01:46,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:01:46,484 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 18 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 04:01:46,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:01:46,545 INFO L225 Difference]: With dead ends: 47031 [2021-06-05 04:01:46,545 INFO L226 Difference]: Without dead ends: 46962 [2021-06-05 04:01:46,545 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 330.9ms TimeCoverageRelationStatistics Valid=197, Invalid=453, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:01:46,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46962 states. [2021-06-05 04:01:47,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46962 to 38816. [2021-06-05 04:01:47,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38816 states, 38815 states have (on average 2.578023959809352) internal successors, (100066), 38815 states have internal predecessors, (100066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:47,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38816 states to 38816 states and 100066 transitions. [2021-06-05 04:01:47,285 INFO L78 Accepts]: Start accepts. Automaton has 38816 states and 100066 transitions. Word has length 65 [2021-06-05 04:01:47,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:01:47,285 INFO L482 AbstractCegarLoop]: Abstraction has 38816 states and 100066 transitions. [2021-06-05 04:01:47,286 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 18 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:47,286 INFO L276 IsEmpty]: Start isEmpty. Operand 38816 states and 100066 transitions. [2021-06-05 04:01:47,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 04:01:47,304 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:01:47,304 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:01:47,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1494,683 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:01:47,504 INFO L430 AbstractCegarLoop]: === Iteration 692 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:01:47,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:01:47,504 INFO L82 PathProgramCache]: Analyzing trace with hash 1137765000, now seen corresponding path program 428 times [2021-06-05 04:01:47,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:01:47,504 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056452604] [2021-06-05 04:01:47,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:01:47,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:01:47,675 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 207 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:01:47,675 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:01:47,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056452604] [2021-06-05 04:01:47,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056452604] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:01:47,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611646229] [2021-06-05 04:01:47,676 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 684 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 684 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:01:47,706 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:01:47,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:01:47,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:01:47,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:01:47,807 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 207 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:01:47,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611646229] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:01:47,808 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:01:47,808 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 19 [2021-06-05 04:01:47,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244106884] [2021-06-05 04:01:47,808 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:01:47,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:01:47,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:01:47,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=341, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:01:47,808 INFO L87 Difference]: Start difference. First operand 38816 states and 100066 transitions. Second operand has 20 states, 20 states have (on average 3.3) internal successors, (66), 19 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:49,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:01:49,171 INFO L93 Difference]: Finished difference Result 54939 states and 131697 transitions. [2021-06-05 04:01:49,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 04:01:49,171 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.3) internal successors, (66), 19 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 04:01:49,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:01:49,231 INFO L225 Difference]: With dead ends: 54939 [2021-06-05 04:01:49,231 INFO L226 Difference]: Without dead ends: 51255 [2021-06-05 04:01:49,231 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 64 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 524.3ms TimeCoverageRelationStatistics Valid=279, Invalid=1527, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 04:01:49,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51255 states. [2021-06-05 04:01:49,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51255 to 21503. [2021-06-05 04:01:49,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21503 states, 21502 states have (on average 2.5758069016835643) internal successors, (55385), 21502 states have internal predecessors, (55385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:49,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21503 states to 21503 states and 55385 transitions. [2021-06-05 04:01:49,650 INFO L78 Accepts]: Start accepts. Automaton has 21503 states and 55385 transitions. Word has length 65 [2021-06-05 04:01:49,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:01:49,650 INFO L482 AbstractCegarLoop]: Abstraction has 21503 states and 55385 transitions. [2021-06-05 04:01:49,650 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.3) internal successors, (66), 19 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:49,650 INFO L276 IsEmpty]: Start isEmpty. Operand 21503 states and 55385 transitions. [2021-06-05 04:01:49,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 04:01:49,664 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:01:49,664 INFO L521 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:01:49,864 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1503,684 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:01:49,865 INFO L430 AbstractCegarLoop]: === Iteration 693 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:01:49,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:01:49,865 INFO L82 PathProgramCache]: Analyzing trace with hash 899703483, now seen corresponding path program 206 times [2021-06-05 04:01:49,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:01:49,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841309323] [2021-06-05 04:01:49,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:01:49,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:01:49,940 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 159 proven. 68 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:01:49,940 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:01:49,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841309323] [2021-06-05 04:01:49,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841309323] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:01:49,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570295115] [2021-06-05 04:01:49,940 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 685 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 685 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:01:49,966 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:01:49,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:01:49,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:01:49,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:01:50,057 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 160 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:01:50,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570295115] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:01:50,057 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:01:50,057 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2021-06-05 04:01:50,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496531841] [2021-06-05 04:01:50,057 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:01:50,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:01:50,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:01:50,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=103, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:01:50,058 INFO L87 Difference]: Start difference. First operand 21503 states and 55385 transitions. Second operand has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:50,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:01:50,478 INFO L93 Difference]: Finished difference Result 24717 states and 62408 transitions. [2021-06-05 04:01:50,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:01:50,478 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 04:01:50,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:01:50,505 INFO L225 Difference]: With dead ends: 24717 [2021-06-05 04:01:50,505 INFO L226 Difference]: Without dead ends: 24695 [2021-06-05 04:01:50,505 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 79.3ms TimeCoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:01:50,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24695 states. [2021-06-05 04:01:50,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24695 to 22169. [2021-06-05 04:01:50,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22169 states, 22168 states have (on average 2.578265968964273) internal successors, (57155), 22168 states have internal predecessors, (57155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:50,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22169 states to 22169 states and 57155 transitions. [2021-06-05 04:01:50,913 INFO L78 Accepts]: Start accepts. Automaton has 22169 states and 57155 transitions. Word has length 65 [2021-06-05 04:01:50,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:01:50,913 INFO L482 AbstractCegarLoop]: Abstraction has 22169 states and 57155 transitions. [2021-06-05 04:01:50,913 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:50,913 INFO L276 IsEmpty]: Start isEmpty. Operand 22169 states and 57155 transitions. [2021-06-05 04:01:50,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 04:01:50,931 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:01:50,931 INFO L521 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:01:51,131 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 685 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1504 [2021-06-05 04:01:51,131 INFO L430 AbstractCegarLoop]: === Iteration 694 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:01:51,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:01:51,132 INFO L82 PathProgramCache]: Analyzing trace with hash 277823073, now seen corresponding path program 207 times [2021-06-05 04:01:51,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:01:51,132 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105741442] [2021-06-05 04:01:51,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:01:51,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:01:51,217 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 159 proven. 67 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:01:51,217 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:01:51,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105741442] [2021-06-05 04:01:51,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105741442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:01:51,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677365640] [2021-06-05 04:01:51,217 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 686 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 686 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:01:51,251 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-06-05 04:01:51,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:01:51,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:01:51,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:01:51,353 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 160 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:01:51,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677365640] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:01:51,353 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:01:51,353 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2021-06-05 04:01:51,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757188320] [2021-06-05 04:01:51,353 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:01:51,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:01:51,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:01:51,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=103, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:01:51,353 INFO L87 Difference]: Start difference. First operand 22169 states and 57155 transitions. Second operand has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:51,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:01:51,678 INFO L93 Difference]: Finished difference Result 28444 states and 70486 transitions. [2021-06-05 04:01:51,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:01:51,679 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 04:01:51,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:01:51,711 INFO L225 Difference]: With dead ends: 28444 [2021-06-05 04:01:51,711 INFO L226 Difference]: Without dead ends: 28444 [2021-06-05 04:01:51,711 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 141.6ms TimeCoverageRelationStatistics Valid=191, Invalid=271, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:01:51,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28444 states. [2021-06-05 04:01:52,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28444 to 22174. [2021-06-05 04:01:52,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22174 states, 22173 states have (on average 2.5783610697695396) internal successors, (57170), 22173 states have internal predecessors, (57170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:52,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22174 states to 22174 states and 57170 transitions. [2021-06-05 04:01:52,124 INFO L78 Accepts]: Start accepts. Automaton has 22174 states and 57170 transitions. Word has length 65 [2021-06-05 04:01:52,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:01:52,124 INFO L482 AbstractCegarLoop]: Abstraction has 22174 states and 57170 transitions. [2021-06-05 04:01:52,124 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:52,124 INFO L276 IsEmpty]: Start isEmpty. Operand 22174 states and 57170 transitions. [2021-06-05 04:01:52,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 04:01:52,138 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:01:52,138 INFO L521 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:01:52,339 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1506,686 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:01:52,339 INFO L430 AbstractCegarLoop]: === Iteration 695 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:01:52,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:01:52,339 INFO L82 PathProgramCache]: Analyzing trace with hash -1359749383, now seen corresponding path program 208 times [2021-06-05 04:01:52,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:01:52,339 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689906922] [2021-06-05 04:01:52,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:01:52,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:01:52,425 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 159 proven. 67 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:01:52,426 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:01:52,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689906922] [2021-06-05 04:01:52,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689906922] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:01:52,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471760460] [2021-06-05 04:01:52,426 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 687 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 687 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:01:52,452 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:01:52,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:01:52,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:01:52,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:01:52,545 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 160 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:01:52,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471760460] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:01:52,545 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:01:52,545 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 14 [2021-06-05 04:01:52,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271435983] [2021-06-05 04:01:52,546 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:01:52,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:01:52,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:01:52,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:01:52,546 INFO L87 Difference]: Start difference. First operand 22174 states and 57170 transitions. Second operand has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:53,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:01:53,042 INFO L93 Difference]: Finished difference Result 31395 states and 77134 transitions. [2021-06-05 04:01:53,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 04:01:53,042 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 04:01:53,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:01:53,072 INFO L225 Difference]: With dead ends: 31395 [2021-06-05 04:01:53,072 INFO L226 Difference]: Without dead ends: 31395 [2021-06-05 04:01:53,072 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 199.9ms TimeCoverageRelationStatistics Valid=334, Invalid=536, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:01:53,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31395 states. [2021-06-05 04:01:53,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31395 to 22193. [2021-06-05 04:01:53,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22193 states, 22192 states have (on average 2.578857245854362) internal successors, (57230), 22192 states have internal predecessors, (57230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:53,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22193 states to 22193 states and 57230 transitions. [2021-06-05 04:01:53,376 INFO L78 Accepts]: Start accepts. Automaton has 22193 states and 57230 transitions. Word has length 65 [2021-06-05 04:01:53,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:01:53,376 INFO L482 AbstractCegarLoop]: Abstraction has 22193 states and 57230 transitions. [2021-06-05 04:01:53,376 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:53,376 INFO L276 IsEmpty]: Start isEmpty. Operand 22193 states and 57230 transitions. [2021-06-05 04:01:53,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 04:01:53,390 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:01:53,390 INFO L521 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:01:53,591 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1507,687 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:01:53,591 INFO L430 AbstractCegarLoop]: === Iteration 696 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:01:53,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:01:53,591 INFO L82 PathProgramCache]: Analyzing trace with hash 1245222749, now seen corresponding path program 209 times [2021-06-05 04:01:53,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:01:53,591 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676400356] [2021-06-05 04:01:53,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:01:53,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:01:53,687 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 155 proven. 71 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:01:53,688 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:01:53,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676400356] [2021-06-05 04:01:53,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676400356] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:01:53,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443292202] [2021-06-05 04:01:53,688 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 688 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 688 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:01:53,722 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-06-05 04:01:53,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:01:53,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:01:53,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:01:54,073 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 156 proven. 71 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:01:54,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443292202] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:01:54,074 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:01:54,074 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 21] total 34 [2021-06-05 04:01:54,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893515355] [2021-06-05 04:01:54,074 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 04:01:54,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:01:54,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 04:01:54,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=316, Invalid=874, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 04:01:54,074 INFO L87 Difference]: Start difference. First operand 22193 states and 57230 transitions. Second operand has 35 states, 35 states have (on average 3.4) internal successors, (119), 34 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:55,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:01:55,612 INFO L93 Difference]: Finished difference Result 34652 states and 84369 transitions. [2021-06-05 04:01:55,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-05 04:01:55,613 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.4) internal successors, (119), 34 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 04:01:55,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:01:55,647 INFO L225 Difference]: With dead ends: 34652 [2021-06-05 04:01:55,647 INFO L226 Difference]: Without dead ends: 34652 [2021-06-05 04:01:55,647 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1535 ImplicationChecksByTransitivity, 948.9ms TimeCoverageRelationStatistics Valid=1723, Invalid=3679, Unknown=0, NotChecked=0, Total=5402 [2021-06-05 04:01:55,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34652 states. [2021-06-05 04:01:55,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34652 to 22218. [2021-06-05 04:01:56,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22218 states, 22217 states have (on average 2.5794661745510195) internal successors, (57308), 22217 states have internal predecessors, (57308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:56,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22218 states to 22218 states and 57308 transitions. [2021-06-05 04:01:56,054 INFO L78 Accepts]: Start accepts. Automaton has 22218 states and 57308 transitions. Word has length 65 [2021-06-05 04:01:56,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:01:56,054 INFO L482 AbstractCegarLoop]: Abstraction has 22218 states and 57308 transitions. [2021-06-05 04:01:56,054 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 3.4) internal successors, (119), 34 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:56,054 INFO L276 IsEmpty]: Start isEmpty. Operand 22218 states and 57308 transitions. [2021-06-05 04:01:56,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 04:01:56,067 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:01:56,067 INFO L521 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:01:56,267 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1508,688 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:01:56,267 INFO L430 AbstractCegarLoop]: === Iteration 697 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:01:56,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:01:56,267 INFO L82 PathProgramCache]: Analyzing trace with hash 205935737, now seen corresponding path program 210 times [2021-06-05 04:01:56,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:01:56,267 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150686808] [2021-06-05 04:01:56,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:01:56,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:01:56,383 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 151 proven. 75 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:01:56,383 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:01:56,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150686808] [2021-06-05 04:01:56,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150686808] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:01:56,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299703986] [2021-06-05 04:01:56,383 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 689 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 689 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:01:56,417 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-06-05 04:01:56,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:01:56,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:01:56,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:01:56,520 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 152 proven. 75 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:01:56,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299703986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:01:56,521 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:01:56,521 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 16 [2021-06-05 04:01:56,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506582540] [2021-06-05 04:01:56,521 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:01:56,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:01:56,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:01:56,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:01:56,521 INFO L87 Difference]: Start difference. First operand 22218 states and 57308 transitions. Second operand has 17 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 16 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:57,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:01:57,214 INFO L93 Difference]: Finished difference Result 33551 states and 82084 transitions. [2021-06-05 04:01:57,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 04:01:57,214 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 16 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 04:01:57,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:01:57,259 INFO L225 Difference]: With dead ends: 33551 [2021-06-05 04:01:57,259 INFO L226 Difference]: Without dead ends: 33551 [2021-06-05 04:01:57,259 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 371.4ms TimeCoverageRelationStatistics Valid=581, Invalid=979, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 04:01:57,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33551 states. [2021-06-05 04:01:57,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33551 to 22249. [2021-06-05 04:01:57,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22249 states, 22248 states have (on average 2.5801869830996043) internal successors, (57404), 22248 states have internal predecessors, (57404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:57,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22249 states to 22249 states and 57404 transitions. [2021-06-05 04:01:57,609 INFO L78 Accepts]: Start accepts. Automaton has 22249 states and 57404 transitions. Word has length 65 [2021-06-05 04:01:57,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:01:57,609 INFO L482 AbstractCegarLoop]: Abstraction has 22249 states and 57404 transitions. [2021-06-05 04:01:57,609 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 16 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:57,609 INFO L276 IsEmpty]: Start isEmpty. Operand 22249 states and 57404 transitions. [2021-06-05 04:01:57,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 04:01:57,623 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:01:57,623 INFO L521 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:01:57,823 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1509,689 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:01:57,824 INFO L430 AbstractCegarLoop]: === Iteration 698 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:01:57,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:01:57,824 INFO L82 PathProgramCache]: Analyzing trace with hash 1225798109, now seen corresponding path program 211 times [2021-06-05 04:01:57,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:01:57,824 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971920352] [2021-06-05 04:01:57,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:01:57,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:01:57,948 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 147 proven. 79 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:01:57,948 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:01:57,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971920352] [2021-06-05 04:01:57,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971920352] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:01:57,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112112300] [2021-06-05 04:01:57,948 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 690 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 690 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:01:57,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:01:57,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:01:57,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:01:58,156 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 148 proven. 79 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:01:58,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112112300] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:01:58,156 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:01:58,156 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 17 [2021-06-05 04:01:58,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463498614] [2021-06-05 04:01:58,156 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:01:58,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:01:58,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:01:58,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:01:58,156 INFO L87 Difference]: Start difference. First operand 22249 states and 57404 transitions. Second operand has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 17 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:58,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:01:58,855 INFO L93 Difference]: Finished difference Result 32856 states and 80575 transitions. [2021-06-05 04:01:58,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 04:01:58,855 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 17 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 04:01:58,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:01:58,892 INFO L225 Difference]: With dead ends: 32856 [2021-06-05 04:01:58,892 INFO L226 Difference]: Without dead ends: 32856 [2021-06-05 04:01:58,892 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 425.5ms TimeCoverageRelationStatistics Valid=644, Invalid=1078, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 04:01:58,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32856 states. [2021-06-05 04:01:59,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32856 to 22286. [2021-06-05 04:01:59,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22286 states, 22285 states have (on average 2.5810186223917433) internal successors, (57518), 22285 states have internal predecessors, (57518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:59,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22286 states to 22286 states and 57518 transitions. [2021-06-05 04:01:59,234 INFO L78 Accepts]: Start accepts. Automaton has 22286 states and 57518 transitions. Word has length 65 [2021-06-05 04:01:59,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:01:59,234 INFO L482 AbstractCegarLoop]: Abstraction has 22286 states and 57518 transitions. [2021-06-05 04:01:59,234 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 17 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:59,235 INFO L276 IsEmpty]: Start isEmpty. Operand 22286 states and 57518 transitions. [2021-06-05 04:01:59,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 04:01:59,248 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:01:59,248 INFO L521 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:01:59,449 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 690 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1510 [2021-06-05 04:01:59,449 INFO L430 AbstractCegarLoop]: === Iteration 699 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:01:59,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:01:59,449 INFO L82 PathProgramCache]: Analyzing trace with hash 1347070457, now seen corresponding path program 212 times [2021-06-05 04:01:59,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:01:59,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872263139] [2021-06-05 04:01:59,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:01:59,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:01:59,658 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 143 proven. 83 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:01:59,658 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:01:59,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872263139] [2021-06-05 04:01:59,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872263139] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:01:59,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197915808] [2021-06-05 04:01:59,658 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 691 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 691 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:01:59,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:01:59,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:01:59,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:01:59,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:01:59,778 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 144 proven. 83 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:01:59,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197915808] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:01:59,779 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:01:59,779 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 18 [2021-06-05 04:01:59,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118432106] [2021-06-05 04:01:59,779 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:01:59,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:01:59,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:01:59,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:01:59,779 INFO L87 Difference]: Start difference. First operand 22286 states and 57518 transitions. Second operand has 19 states, 19 states have (on average 3.6315789473684212) internal successors, (69), 18 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:00,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:02:00,391 INFO L93 Difference]: Finished difference Result 31051 states and 76554 transitions. [2021-06-05 04:02:00,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 04:02:00,391 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.6315789473684212) internal successors, (69), 18 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 04:02:00,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:02:00,428 INFO L225 Difference]: With dead ends: 31051 [2021-06-05 04:02:00,428 INFO L226 Difference]: Without dead ends: 31051 [2021-06-05 04:02:00,429 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 427.1ms TimeCoverageRelationStatistics Valid=642, Invalid=1080, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 04:02:00,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31051 states. [2021-06-05 04:02:00,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31051 to 22329. [2021-06-05 04:02:00,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22329 states, 22328 states have (on average 2.5819598710139733) internal successors, (57650), 22328 states have internal predecessors, (57650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:00,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22329 states to 22329 states and 57650 transitions. [2021-06-05 04:02:00,762 INFO L78 Accepts]: Start accepts. Automaton has 22329 states and 57650 transitions. Word has length 65 [2021-06-05 04:02:00,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:02:00,762 INFO L482 AbstractCegarLoop]: Abstraction has 22329 states and 57650 transitions. [2021-06-05 04:02:00,762 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.6315789473684212) internal successors, (69), 18 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:00,763 INFO L276 IsEmpty]: Start isEmpty. Operand 22329 states and 57650 transitions. [2021-06-05 04:02:00,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 04:02:00,776 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:02:00,776 INFO L521 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:02:00,977 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1511,691 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:02:00,977 INFO L430 AbstractCegarLoop]: === Iteration 700 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:02:00,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:02:00,977 INFO L82 PathProgramCache]: Analyzing trace with hash 2104093789, now seen corresponding path program 213 times [2021-06-05 04:02:00,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:02:00,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393902548] [2021-06-05 04:02:00,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:02:00,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:02:01,118 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 139 proven. 87 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:02:01,118 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:02:01,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393902548] [2021-06-05 04:02:01,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393902548] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:02:01,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511228758] [2021-06-05 04:02:01,118 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 692 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 692 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:02:01,152 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-06-05 04:02:01,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:02:01,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 04:02:01,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:02:01,427 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 168 proven. 59 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:02:01,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511228758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:02:01,427 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:02:01,427 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 26 [2021-06-05 04:02:01,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166867514] [2021-06-05 04:02:01,427 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 04:02:01,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:02:01,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 04:02:01,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=478, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:02:01,427 INFO L87 Difference]: Start difference. First operand 22329 states and 57650 transitions. Second operand has 27 states, 27 states have (on average 3.2222222222222223) internal successors, (87), 26 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:01,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:02:01,960 INFO L93 Difference]: Finished difference Result 24355 states and 61424 transitions. [2021-06-05 04:02:01,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:02:01,961 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.2222222222222223) internal successors, (87), 26 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 04:02:01,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:02:01,986 INFO L225 Difference]: With dead ends: 24355 [2021-06-05 04:02:01,986 INFO L226 Difference]: Without dead ends: 24355 [2021-06-05 04:02:01,986 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 406.4ms TimeCoverageRelationStatistics Valid=398, Invalid=792, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 04:02:02,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24355 states. [2021-06-05 04:02:02,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24355 to 21269. [2021-06-05 04:02:02,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21269 states, 21268 states have (on average 2.579179988715441) internal successors, (54854), 21268 states have internal predecessors, (54854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:02,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21269 states to 21269 states and 54854 transitions. [2021-06-05 04:02:02,274 INFO L78 Accepts]: Start accepts. Automaton has 21269 states and 54854 transitions. Word has length 65 [2021-06-05 04:02:02,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:02:02,274 INFO L482 AbstractCegarLoop]: Abstraction has 21269 states and 54854 transitions. [2021-06-05 04:02:02,274 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 3.2222222222222223) internal successors, (87), 26 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:02,275 INFO L276 IsEmpty]: Start isEmpty. Operand 21269 states and 54854 transitions. [2021-06-05 04:02:02,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 04:02:02,288 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:02:02,288 INFO L521 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:02:02,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 692 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1512 [2021-06-05 04:02:02,489 INFO L430 AbstractCegarLoop]: === Iteration 701 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:02:02,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:02:02,489 INFO L82 PathProgramCache]: Analyzing trace with hash 575885197, now seen corresponding path program 429 times [2021-06-05 04:02:02,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:02:02,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310484176] [2021-06-05 04:02:02,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:02:02,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:02:02,638 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 98 proven. 129 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:02:02,638 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:02:02,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310484176] [2021-06-05 04:02:02,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310484176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:02:02,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502616671] [2021-06-05 04:02:02,639 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 693 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 693 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:02:02,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-05 04:02:02,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:02:02,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:02:02,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:02:02,764 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 98 proven. 129 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:02:02,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502616671] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:02:02,764 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:02:02,764 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2021-06-05 04:02:02,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885780504] [2021-06-05 04:02:02,764 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:02:02,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:02:02,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:02:02,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:02:02,765 INFO L87 Difference]: Start difference. First operand 21269 states and 54854 transitions. Second operand has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:03,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:02:03,137 INFO L93 Difference]: Finished difference Result 25861 states and 62908 transitions. [2021-06-05 04:02:03,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:02:03,137 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 04:02:03,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:02:03,165 INFO L225 Difference]: With dead ends: 25861 [2021-06-05 04:02:03,166 INFO L226 Difference]: Without dead ends: 25789 [2021-06-05 04:02:03,166 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 210.2ms TimeCoverageRelationStatistics Valid=225, Invalid=531, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:02:03,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25789 states. [2021-06-05 04:02:03,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25789 to 21278. [2021-06-05 04:02:03,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21278 states, 21277 states have (on average 2.5785120082718427) internal successors, (54863), 21277 states have internal predecessors, (54863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:03,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21278 states to 21278 states and 54863 transitions. [2021-06-05 04:02:03,517 INFO L78 Accepts]: Start accepts. Automaton has 21278 states and 54863 transitions. Word has length 65 [2021-06-05 04:02:03,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:02:03,517 INFO L482 AbstractCegarLoop]: Abstraction has 21278 states and 54863 transitions. [2021-06-05 04:02:03,517 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:03,517 INFO L276 IsEmpty]: Start isEmpty. Operand 21278 states and 54863 transitions. [2021-06-05 04:02:03,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 04:02:03,531 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:02:03,531 INFO L521 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:02:03,731 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 693 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1515 [2021-06-05 04:02:03,731 INFO L430 AbstractCegarLoop]: === Iteration 702 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:02:03,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:02:03,731 INFO L82 PathProgramCache]: Analyzing trace with hash -606613963, now seen corresponding path program 430 times [2021-06-05 04:02:03,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:02:03,732 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932264347] [2021-06-05 04:02:03,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:02:03,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:02:03,887 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 115 proven. 111 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:02:03,887 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:02:03,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932264347] [2021-06-05 04:02:03,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932264347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:02:03,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870765019] [2021-06-05 04:02:03,887 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 694 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 694 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:02:03,913 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:02:03,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:02:03,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:02:03,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:02:04,004 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 115 proven. 111 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:02:04,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870765019] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:02:04,004 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:02:04,004 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2021-06-05 04:02:04,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820580202] [2021-06-05 04:02:04,004 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:02:04,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:02:04,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:02:04,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:02:04,004 INFO L87 Difference]: Start difference. First operand 21278 states and 54863 transitions. Second operand has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:04,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:02:04,519 INFO L93 Difference]: Finished difference Result 25318 states and 62750 transitions. [2021-06-05 04:02:04,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:02:04,519 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 04:02:04,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:02:04,552 INFO L225 Difference]: With dead ends: 25318 [2021-06-05 04:02:04,552 INFO L226 Difference]: Without dead ends: 25318 [2021-06-05 04:02:04,553 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 299.7ms TimeCoverageRelationStatistics Valid=410, Invalid=780, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 04:02:04,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25318 states. [2021-06-05 04:02:04,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25318 to 21847. [2021-06-05 04:02:04,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21847 states, 21846 states have (on average 2.5901309164149042) internal successors, (56584), 21846 states have internal predecessors, (56584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:04,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21847 states to 21847 states and 56584 transitions. [2021-06-05 04:02:04,932 INFO L78 Accepts]: Start accepts. Automaton has 21847 states and 56584 transitions. Word has length 65 [2021-06-05 04:02:04,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:02:04,932 INFO L482 AbstractCegarLoop]: Abstraction has 21847 states and 56584 transitions. [2021-06-05 04:02:04,932 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:04,932 INFO L276 IsEmpty]: Start isEmpty. Operand 21847 states and 56584 transitions. [2021-06-05 04:02:04,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 04:02:04,945 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:02:04,945 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:02:05,146 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1525,694 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:02:05,146 INFO L430 AbstractCegarLoop]: === Iteration 703 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:02:05,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:02:05,146 INFO L82 PathProgramCache]: Analyzing trace with hash 1882062882, now seen corresponding path program 214 times [2021-06-05 04:02:05,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:02:05,146 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171609350] [2021-06-05 04:02:05,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:02:05,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:02:05,311 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 9 proven. 215 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:02:05,312 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:02:05,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171609350] [2021-06-05 04:02:05,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171609350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:02:05,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563478823] [2021-06-05 04:02:05,312 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 695 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 695 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:02:05,338 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:02:05,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:02:05,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:02:05,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:02:05,423 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 9 proven. 215 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:02:05,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563478823] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:02:05,423 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:02:05,423 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 19 [2021-06-05 04:02:05,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008885256] [2021-06-05 04:02:05,423 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:02:05,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:02:05,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:02:05,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=341, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:02:05,423 INFO L87 Difference]: Start difference. First operand 21847 states and 56584 transitions. Second operand has 20 states, 20 states have (on average 3.25) internal successors, (65), 19 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:06,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:02:06,377 INFO L93 Difference]: Finished difference Result 31658 states and 77186 transitions. [2021-06-05 04:02:06,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 04:02:06,377 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.25) internal successors, (65), 19 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 04:02:06,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:02:06,414 INFO L225 Difference]: With dead ends: 31658 [2021-06-05 04:02:06,414 INFO L226 Difference]: Without dead ends: 31304 [2021-06-05 04:02:06,414 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 64 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 497.6ms TimeCoverageRelationStatistics Valid=279, Invalid=1527, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 04:02:06,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31304 states. [2021-06-05 04:02:06,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31304 to 21731. [2021-06-05 04:02:06,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21731 states, 21730 states have (on average 2.589599631845375) internal successors, (56272), 21730 states have internal predecessors, (56272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:06,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21731 states to 21731 states and 56272 transitions. [2021-06-05 04:02:06,764 INFO L78 Accepts]: Start accepts. Automaton has 21731 states and 56272 transitions. Word has length 65 [2021-06-05 04:02:06,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:02:06,764 INFO L482 AbstractCegarLoop]: Abstraction has 21731 states and 56272 transitions. [2021-06-05 04:02:06,764 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.25) internal successors, (65), 19 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:06,764 INFO L276 IsEmpty]: Start isEmpty. Operand 21731 states and 56272 transitions. [2021-06-05 04:02:06,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 04:02:06,778 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:02:06,778 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:02:06,979 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1526,695 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:02:06,979 INFO L430 AbstractCegarLoop]: === Iteration 704 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:02:06,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:02:06,979 INFO L82 PathProgramCache]: Analyzing trace with hash -1906436062, now seen corresponding path program 431 times [2021-06-05 04:02:06,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:02:06,979 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205159571] [2021-06-05 04:02:06,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:02:06,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:02:07,244 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 20 proven. 204 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:02:07,244 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:02:07,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205159571] [2021-06-05 04:02:07,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205159571] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:02:07,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985079205] [2021-06-05 04:02:07,244 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 696 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 696 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:02:07,278 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-06-05 04:02:07,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:02:07,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:02:07,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:02:07,594 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 17 proven. 207 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:02:07,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985079205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:02:07,594 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:02:07,594 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 26 [2021-06-05 04:02:07,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751983280] [2021-06-05 04:02:07,594 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 04:02:07,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:02:07,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 04:02:07,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=635, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:02:07,595 INFO L87 Difference]: Start difference. First operand 21731 states and 56272 transitions. Second operand has 27 states, 27 states have (on average 3.3333333333333335) internal successors, (90), 26 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:08,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:02:08,742 INFO L93 Difference]: Finished difference Result 22051 states and 56777 transitions. [2021-06-05 04:02:08,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:02:08,743 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.3333333333333335) internal successors, (90), 26 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 04:02:08,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:02:08,766 INFO L225 Difference]: With dead ends: 22051 [2021-06-05 04:02:08,766 INFO L226 Difference]: Without dead ends: 21959 [2021-06-05 04:02:08,766 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 448.0ms TimeCoverageRelationStatistics Valid=71, Invalid=685, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:02:08,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21959 states. [2021-06-05 04:02:08,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21959 to 21731. [2021-06-05 04:02:09,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21731 states, 21730 states have (on average 2.5878048780487806) internal successors, (56233), 21730 states have internal predecessors, (56233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:09,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21731 states to 21731 states and 56233 transitions. [2021-06-05 04:02:09,046 INFO L78 Accepts]: Start accepts. Automaton has 21731 states and 56233 transitions. Word has length 65 [2021-06-05 04:02:09,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:02:09,046 INFO L482 AbstractCegarLoop]: Abstraction has 21731 states and 56233 transitions. [2021-06-05 04:02:09,046 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 3.3333333333333335) internal successors, (90), 26 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:09,046 INFO L276 IsEmpty]: Start isEmpty. Operand 21731 states and 56233 transitions. [2021-06-05 04:02:09,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 04:02:09,059 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:02:09,059 INFO L521 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:02:09,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1527,696 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:02:09,260 INFO L430 AbstractCegarLoop]: === Iteration 705 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:02:09,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:02:09,260 INFO L82 PathProgramCache]: Analyzing trace with hash -2089008901, now seen corresponding path program 215 times [2021-06-05 04:02:09,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:02:09,260 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341174702] [2021-06-05 04:02:09,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:02:09,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:02:09,394 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 89 proven. 136 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:02:09,395 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:02:09,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341174702] [2021-06-05 04:02:09,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341174702] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:02:09,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83871401] [2021-06-05 04:02:09,395 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 697 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 697 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:02:09,424 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-05 04:02:09,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:02:09,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:02:09,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:02:09,546 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 89 proven. 136 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:02:09,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83871401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:02:09,546 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:02:09,546 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 22 [2021-06-05 04:02:09,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647796330] [2021-06-05 04:02:09,546 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 04:02:09,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:02:09,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 04:02:09,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:02:09,547 INFO L87 Difference]: Start difference. First operand 21731 states and 56233 transitions. Second operand has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 22 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:09,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:02:09,945 INFO L93 Difference]: Finished difference Result 26614 states and 65760 transitions. [2021-06-05 04:02:09,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:02:09,945 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 22 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 04:02:09,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:02:09,975 INFO L225 Difference]: With dead ends: 26614 [2021-06-05 04:02:09,975 INFO L226 Difference]: Without dead ends: 26400 [2021-06-05 04:02:09,975 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 226.0ms TimeCoverageRelationStatistics Valid=227, Invalid=643, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:02:09,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26400 states. [2021-06-05 04:02:10,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26400 to 20333. [2021-06-05 04:02:10,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20333 states, 20332 states have (on average 2.5844481605351173) internal successors, (52547), 20332 states have internal predecessors, (52547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:10,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20333 states to 20333 states and 52547 transitions. [2021-06-05 04:02:10,336 INFO L78 Accepts]: Start accepts. Automaton has 20333 states and 52547 transitions. Word has length 65 [2021-06-05 04:02:10,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:02:10,336 INFO L482 AbstractCegarLoop]: Abstraction has 20333 states and 52547 transitions. [2021-06-05 04:02:10,336 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 22 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:10,336 INFO L276 IsEmpty]: Start isEmpty. Operand 20333 states and 52547 transitions. [2021-06-05 04:02:10,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 04:02:10,349 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:02:10,349 INFO L521 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:02:10,549 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1528,697 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:02:10,549 INFO L430 AbstractCegarLoop]: === Iteration 706 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:02:10,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:02:10,550 INFO L82 PathProgramCache]: Analyzing trace with hash 1260890519, now seen corresponding path program 432 times [2021-06-05 04:02:10,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:02:10,550 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347543766] [2021-06-05 04:02:10,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:02:10,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:02:10,688 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 113 proven. 113 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:02:10,688 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:02:10,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347543766] [2021-06-05 04:02:10,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347543766] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:02:10,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375924325] [2021-06-05 04:02:10,689 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 698 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 698 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:02:10,719 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-06-05 04:02:10,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:02:10,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:02:10,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:02:10,808 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 113 proven. 113 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:02:10,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375924325] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:02:10,809 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:02:10,809 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-06-05 04:02:10,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551085888] [2021-06-05 04:02:10,809 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:02:10,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:02:10,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:02:10,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:02:10,809 INFO L87 Difference]: Start difference. First operand 20333 states and 52547 transitions. Second operand has 19 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 18 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:11,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:02:11,320 INFO L93 Difference]: Finished difference Result 24482 states and 60602 transitions. [2021-06-05 04:02:11,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:02:11,321 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 18 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 04:02:11,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:02:11,346 INFO L225 Difference]: With dead ends: 24482 [2021-06-05 04:02:11,346 INFO L226 Difference]: Without dead ends: 24482 [2021-06-05 04:02:11,346 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 253.0ms TimeCoverageRelationStatistics Valid=348, Invalid=644, Unknown=0, NotChecked=0, Total=992 [2021-06-05 04:02:11,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24482 states. [2021-06-05 04:02:11,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24482 to 20771. [2021-06-05 04:02:11,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20771 states, 20770 states have (on average 2.59393355801637) internal successors, (53876), 20770 states have internal predecessors, (53876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:11,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20771 states to 20771 states and 53876 transitions. [2021-06-05 04:02:11,622 INFO L78 Accepts]: Start accepts. Automaton has 20771 states and 53876 transitions. Word has length 65 [2021-06-05 04:02:11,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:02:11,623 INFO L482 AbstractCegarLoop]: Abstraction has 20771 states and 53876 transitions. [2021-06-05 04:02:11,623 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 18 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:11,623 INFO L276 IsEmpty]: Start isEmpty. Operand 20771 states and 53876 transitions. [2021-06-05 04:02:11,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 04:02:11,635 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:02:11,635 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:02:11,835 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1537,698 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:02:11,835 INFO L430 AbstractCegarLoop]: === Iteration 707 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:02:11,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:02:11,835 INFO L82 PathProgramCache]: Analyzing trace with hash -189242614, now seen corresponding path program 216 times [2021-06-05 04:02:11,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:02:11,836 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449390201] [2021-06-05 04:02:11,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:02:11,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:02:11,989 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 9 proven. 215 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:02:11,989 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:02:11,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449390201] [2021-06-05 04:02:11,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449390201] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:02:11,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519127070] [2021-06-05 04:02:11,990 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 699 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 699 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:02:12,021 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-06-05 04:02:12,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:02:12,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 04:02:12,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:02:12,958 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 65 proven. 159 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:02:12,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519127070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:02:12,958 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:02:12,958 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 21] total 37 [2021-06-05 04:02:12,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364284809] [2021-06-05 04:02:12,958 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 04:02:12,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:02:12,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 04:02:12,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1276, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 04:02:12,959 INFO L87 Difference]: Start difference. First operand 20771 states and 53876 transitions. Second operand has 38 states, 38 states have (on average 3.1052631578947367) internal successors, (118), 37 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:26,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:02:26,704 INFO L93 Difference]: Finished difference Result 41120 states and 96794 transitions. [2021-06-05 04:02:26,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 296 states. [2021-06-05 04:02:26,705 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.1052631578947367) internal successors, (118), 37 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 04:02:26,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:02:26,744 INFO L225 Difference]: With dead ends: 41120 [2021-06-05 04:02:26,744 INFO L226 Difference]: Without dead ends: 40102 [2021-06-05 04:02:26,749 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 314 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39942 ImplicationChecksByTransitivity, 11174.1ms TimeCoverageRelationStatistics Valid=11559, Invalid=87981, Unknown=0, NotChecked=0, Total=99540 [2021-06-05 04:02:26,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40102 states. [2021-06-05 04:02:27,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40102 to 21032. [2021-06-05 04:02:27,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21032 states, 21031 states have (on average 2.6079596785697303) internal successors, (54848), 21031 states have internal predecessors, (54848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:27,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21032 states to 21032 states and 54848 transitions. [2021-06-05 04:02:27,121 INFO L78 Accepts]: Start accepts. Automaton has 21032 states and 54848 transitions. Word has length 65 [2021-06-05 04:02:27,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:02:27,121 INFO L482 AbstractCegarLoop]: Abstraction has 21032 states and 54848 transitions. [2021-06-05 04:02:27,122 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 3.1052631578947367) internal successors, (118), 37 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:27,122 INFO L276 IsEmpty]: Start isEmpty. Operand 21032 states and 54848 transitions. [2021-06-05 04:02:27,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 04:02:27,134 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:02:27,134 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:02:27,334 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1538,699 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:02:27,334 INFO L430 AbstractCegarLoop]: === Iteration 708 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:02:27,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:02:27,335 INFO L82 PathProgramCache]: Analyzing trace with hash 1837526730, now seen corresponding path program 433 times [2021-06-05 04:02:27,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:02:27,335 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896572629] [2021-06-05 04:02:27,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:02:27,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:02:27,502 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 20 proven. 204 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:02:27,502 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:02:27,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896572629] [2021-06-05 04:02:27,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896572629] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:02:27,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645642060] [2021-06-05 04:02:27,502 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 700 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 700 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:02:27,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:02:27,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:02:27,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:02:27,808 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 17 proven. 207 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:02:27,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645642060] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:02:27,808 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:02:27,808 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 24 [2021-06-05 04:02:27,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967340101] [2021-06-05 04:02:27,808 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:02:27,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:02:27,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:02:27,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=539, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:02:27,809 INFO L87 Difference]: Start difference. First operand 21032 states and 54848 transitions. Second operand has 25 states, 25 states have (on average 3.48) internal successors, (87), 24 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:28,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:02:28,792 INFO L93 Difference]: Finished difference Result 21129 states and 55007 transitions. [2021-06-05 04:02:28,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:02:28,792 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.48) internal successors, (87), 24 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 04:02:28,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:02:28,813 INFO L225 Difference]: With dead ends: 21129 [2021-06-05 04:02:28,813 INFO L226 Difference]: Without dead ends: 21049 [2021-06-05 04:02:28,814 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 299.9ms TimeCoverageRelationStatistics Valid=61, Invalid=539, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:02:28,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21049 states. [2021-06-05 04:02:29,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21049 to 21032. [2021-06-05 04:02:29,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21032 states, 21031 states have (on average 2.6062479197375303) internal successors, (54812), 21031 states have internal predecessors, (54812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:29,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21032 states to 21032 states and 54812 transitions. [2021-06-05 04:02:29,067 INFO L78 Accepts]: Start accepts. Automaton has 21032 states and 54812 transitions. Word has length 65 [2021-06-05 04:02:29,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:02:29,067 INFO L482 AbstractCegarLoop]: Abstraction has 21032 states and 54812 transitions. [2021-06-05 04:02:29,068 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 3.48) internal successors, (87), 24 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:29,068 INFO L276 IsEmpty]: Start isEmpty. Operand 21032 states and 54812 transitions. [2021-06-05 04:02:29,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 04:02:29,080 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:02:29,080 INFO L521 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:02:29,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 700 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1549 [2021-06-05 04:02:29,280 INFO L430 AbstractCegarLoop]: === Iteration 709 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:02:29,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:02:29,280 INFO L82 PathProgramCache]: Analyzing trace with hash -1735763595, now seen corresponding path program 434 times [2021-06-05 04:02:29,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:02:29,280 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496763311] [2021-06-05 04:02:29,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:02:29,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:02:29,411 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 111 proven. 115 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:02:29,412 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:02:29,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496763311] [2021-06-05 04:02:29,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496763311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:02:29,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063697516] [2021-06-05 04:02:29,412 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 701 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 701 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:02:29,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:02:29,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:02:29,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:02:29,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:02:29,530 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 111 proven. 115 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:02:29,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063697516] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:02:29,530 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:02:29,530 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2021-06-05 04:02:29,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446744249] [2021-06-05 04:02:29,530 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:02:29,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:02:29,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:02:29,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:02:29,531 INFO L87 Difference]: Start difference. First operand 21032 states and 54812 transitions. Second operand has 18 states, 18 states have (on average 3.5) internal successors, (63), 17 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:29,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:02:29,964 INFO L93 Difference]: Finished difference Result 25621 states and 63905 transitions. [2021-06-05 04:02:29,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:02:29,964 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.5) internal successors, (63), 17 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 04:02:29,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:02:29,993 INFO L225 Difference]: With dead ends: 25621 [2021-06-05 04:02:29,994 INFO L226 Difference]: Without dead ends: 25621 [2021-06-05 04:02:29,994 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 217.3ms TimeCoverageRelationStatistics Valid=291, Invalid=521, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:02:30,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25621 states. [2021-06-05 04:02:30,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25621 to 21619. [2021-06-05 04:02:30,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21619 states, 21618 states have (on average 2.6166620408918493) internal successors, (56567), 21618 states have internal predecessors, (56567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:30,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21619 states to 21619 states and 56567 transitions. [2021-06-05 04:02:30,294 INFO L78 Accepts]: Start accepts. Automaton has 21619 states and 56567 transitions. Word has length 65 [2021-06-05 04:02:30,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:02:30,294 INFO L482 AbstractCegarLoop]: Abstraction has 21619 states and 56567 transitions. [2021-06-05 04:02:30,294 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.5) internal successors, (63), 17 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:30,294 INFO L276 IsEmpty]: Start isEmpty. Operand 21619 states and 56567 transitions. [2021-06-05 04:02:30,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 04:02:30,307 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:02:30,307 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:02:30,507 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 701 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1550 [2021-06-05 04:02:30,508 INFO L430 AbstractCegarLoop]: === Iteration 710 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:02:30,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:02:30,508 INFO L82 PathProgramCache]: Analyzing trace with hash 184232226, now seen corresponding path program 217 times [2021-06-05 04:02:30,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:02:30,508 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003096400] [2021-06-05 04:02:30,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:02:30,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:02:30,656 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 9 proven. 215 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:02:30,656 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:02:30,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003096400] [2021-06-05 04:02:30,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003096400] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:02:30,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369413125] [2021-06-05 04:02:30,656 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 702 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 702 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:02:30,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:02:30,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:02:30,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:02:30,768 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 9 proven. 215 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:02:30,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369413125] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:02:30,768 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:02:30,768 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2021-06-05 04:02:30,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972849332] [2021-06-05 04:02:30,768 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:02:30,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:02:30,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:02:30,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:02:30,768 INFO L87 Difference]: Start difference. First operand 21619 states and 56567 transitions. Second operand has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:31,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:02:31,658 INFO L93 Difference]: Finished difference Result 30759 states and 76558 transitions. [2021-06-05 04:02:31,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 04:02:31,659 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 04:02:31,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:02:31,691 INFO L225 Difference]: With dead ends: 30759 [2021-06-05 04:02:31,691 INFO L226 Difference]: Without dead ends: 30565 [2021-06-05 04:02:31,691 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 66 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 368.0ms TimeCoverageRelationStatistics Valid=187, Invalid=1145, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 04:02:31,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30565 states. [2021-06-05 04:02:32,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30565 to 21497. [2021-06-05 04:02:32,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21497 states, 21496 states have (on average 2.617091551916636) internal successors, (56257), 21496 states have internal predecessors, (56257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:32,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21497 states to 21497 states and 56257 transitions. [2021-06-05 04:02:32,093 INFO L78 Accepts]: Start accepts. Automaton has 21497 states and 56257 transitions. Word has length 65 [2021-06-05 04:02:32,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:02:32,093 INFO L482 AbstractCegarLoop]: Abstraction has 21497 states and 56257 transitions. [2021-06-05 04:02:32,093 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:32,093 INFO L276 IsEmpty]: Start isEmpty. Operand 21497 states and 56257 transitions. [2021-06-05 04:02:32,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 04:02:32,105 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:02:32,105 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:02:32,305 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1551,702 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:02:32,305 INFO L430 AbstractCegarLoop]: === Iteration 711 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:02:32,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:02:32,306 INFO L82 PathProgramCache]: Analyzing trace with hash -1739204318, now seen corresponding path program 435 times [2021-06-05 04:02:32,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:02:32,306 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161490116] [2021-06-05 04:02:32,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:02:32,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:02:32,458 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 20 proven. 204 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:02:32,458 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:02:32,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161490116] [2021-06-05 04:02:32,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161490116] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:02:32,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136772619] [2021-06-05 04:02:32,459 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 703 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 703 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:02:32,490 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-06-05 04:02:32,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:02:32,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:02:32,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:02:32,723 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 17 proven. 207 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:02:32,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136772619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:02:32,724 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:02:32,724 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 22 [2021-06-05 04:02:32,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691429252] [2021-06-05 04:02:32,724 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 04:02:32,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:02:32,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 04:02:32,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:02:32,724 INFO L87 Difference]: Start difference. First operand 21497 states and 56257 transitions. Second operand has 23 states, 23 states have (on average 3.652173913043478) internal successors, (84), 22 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:33,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:02:33,564 INFO L93 Difference]: Finished difference Result 21631 states and 56467 transitions. [2021-06-05 04:02:33,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:02:33,565 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.652173913043478) internal successors, (84), 22 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 04:02:33,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:02:33,588 INFO L225 Difference]: With dead ends: 21631 [2021-06-05 04:02:33,588 INFO L226 Difference]: Without dead ends: 21563 [2021-06-05 04:02:33,589 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 267.8ms TimeCoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:02:33,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21563 states. [2021-06-05 04:02:33,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21563 to 21497. [2021-06-05 04:02:33,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21497 states, 21496 states have (on average 2.6156959434313363) internal successors, (56227), 21496 states have internal predecessors, (56227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:33,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21497 states to 21497 states and 56227 transitions. [2021-06-05 04:02:33,854 INFO L78 Accepts]: Start accepts. Automaton has 21497 states and 56227 transitions. Word has length 65 [2021-06-05 04:02:33,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:02:33,855 INFO L482 AbstractCegarLoop]: Abstraction has 21497 states and 56227 transitions. [2021-06-05 04:02:33,855 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 3.652173913043478) internal successors, (84), 22 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:33,855 INFO L276 IsEmpty]: Start isEmpty. Operand 21497 states and 56227 transitions. [2021-06-05 04:02:33,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 04:02:33,867 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:02:33,867 INFO L521 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:02:34,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 703 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1552 [2021-06-05 04:02:34,068 INFO L430 AbstractCegarLoop]: === Iteration 712 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:02:34,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:02:34,068 INFO L82 PathProgramCache]: Analyzing trace with hash -558648235, now seen corresponding path program 218 times [2021-06-05 04:02:34,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:02:34,068 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198554034] [2021-06-05 04:02:34,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:02:34,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:02:34,163 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 58 proven. 167 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:02:34,163 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:02:34,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198554034] [2021-06-05 04:02:34,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198554034] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:02:34,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772947589] [2021-06-05 04:02:34,163 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 704 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 704 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:02:34,190 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:02:34,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:02:34,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:02:34,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:02:34,280 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 59 proven. 167 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:02:34,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772947589] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:02:34,280 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:02:34,280 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 16 [2021-06-05 04:02:34,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364020811] [2021-06-05 04:02:34,280 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:02:34,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:02:34,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:02:34,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:02:34,281 INFO L87 Difference]: Start difference. First operand 21497 states and 56227 transitions. Second operand has 17 states, 17 states have (on average 4.0) internal successors, (68), 16 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:34,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:02:34,535 INFO L93 Difference]: Finished difference Result 24838 states and 62841 transitions. [2021-06-05 04:02:34,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:02:34,536 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.0) internal successors, (68), 16 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 04:02:34,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:02:34,566 INFO L225 Difference]: With dead ends: 24838 [2021-06-05 04:02:34,567 INFO L226 Difference]: Without dead ends: 24798 [2021-06-05 04:02:34,567 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 120.1ms TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:02:34,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24798 states. [2021-06-05 04:02:34,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24798 to 21213. [2021-06-05 04:02:34,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21213 states, 21212 states have (on average 2.6130020742975675) internal successors, (55427), 21212 states have internal predecessors, (55427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:34,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21213 states to 21213 states and 55427 transitions. [2021-06-05 04:02:34,851 INFO L78 Accepts]: Start accepts. Automaton has 21213 states and 55427 transitions. Word has length 65 [2021-06-05 04:02:34,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:02:34,851 INFO L482 AbstractCegarLoop]: Abstraction has 21213 states and 55427 transitions. [2021-06-05 04:02:34,851 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.0) internal successors, (68), 16 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:34,852 INFO L276 IsEmpty]: Start isEmpty. Operand 21213 states and 55427 transitions. [2021-06-05 04:02:34,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 04:02:34,862 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:02:34,862 INFO L521 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:02:35,063 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1553,704 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:02:35,063 INFO L430 AbstractCegarLoop]: === Iteration 713 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:02:35,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:02:35,063 INFO L82 PathProgramCache]: Analyzing trace with hash 1244849751, now seen corresponding path program 436 times [2021-06-05 04:02:35,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:02:35,063 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517140181] [2021-06-05 04:02:35,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:02:35,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:02:35,173 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 109 proven. 117 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:02:35,174 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:02:35,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517140181] [2021-06-05 04:02:35,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517140181] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:02:35,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658879659] [2021-06-05 04:02:35,174 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 705 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 705 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:02:35,200 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:02:35,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:02:35,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:02:35,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:02:35,291 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 109 proven. 117 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:02:35,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658879659] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:02:35,291 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:02:35,291 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2021-06-05 04:02:35,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997417777] [2021-06-05 04:02:35,292 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:02:35,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:02:35,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:02:35,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:02:35,292 INFO L87 Difference]: Start difference. First operand 21213 states and 55427 transitions. Second operand has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 16 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:35,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:02:35,635 INFO L93 Difference]: Finished difference Result 26196 states and 65316 transitions. [2021-06-05 04:02:35,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:02:35,635 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 16 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 04:02:35,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:02:35,665 INFO L225 Difference]: With dead ends: 26196 [2021-06-05 04:02:35,665 INFO L226 Difference]: Without dead ends: 26196 [2021-06-05 04:02:35,665 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 178.2ms TimeCoverageRelationStatistics Valid=239, Invalid=411, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:02:35,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26196 states. [2021-06-05 04:02:35,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26196 to 21855. [2021-06-05 04:02:35,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21855 states, 21854 states have (on average 2.623272627436625) internal successors, (57329), 21854 states have internal predecessors, (57329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:36,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21855 states to 21855 states and 57329 transitions. [2021-06-05 04:02:36,026 INFO L78 Accepts]: Start accepts. Automaton has 21855 states and 57329 transitions. Word has length 65 [2021-06-05 04:02:36,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:02:36,026 INFO L482 AbstractCegarLoop]: Abstraction has 21855 states and 57329 transitions. [2021-06-05 04:02:36,026 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 16 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:36,026 INFO L276 IsEmpty]: Start isEmpty. Operand 21855 states and 57329 transitions. [2021-06-05 04:02:36,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 04:02:36,038 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:02:36,039 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:02:36,239 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 705 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1559 [2021-06-05 04:02:36,239 INFO L430 AbstractCegarLoop]: === Iteration 714 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:02:36,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:02:36,239 INFO L82 PathProgramCache]: Analyzing trace with hash -735847926, now seen corresponding path program 219 times [2021-06-05 04:02:36,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:02:36,239 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868786132] [2021-06-05 04:02:36,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:02:36,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:02:36,373 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 9 proven. 215 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:02:36,374 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:02:36,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868786132] [2021-06-05 04:02:36,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868786132] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:02:36,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352263333] [2021-06-05 04:02:36,374 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 706 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 706 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:02:36,406 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-06-05 04:02:36,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:02:36,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:02:36,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:02:36,491 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 9 proven. 215 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:02:36,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352263333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:02:36,491 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:02:36,491 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-06-05 04:02:36,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996853056] [2021-06-05 04:02:36,492 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:02:36,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:02:36,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:02:36,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:02:36,492 INFO L87 Difference]: Start difference. First operand 21855 states and 57329 transitions. Second operand has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 16 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:37,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:02:37,295 INFO L93 Difference]: Finished difference Result 29288 states and 73501 transitions. [2021-06-05 04:02:37,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 04:02:37,296 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 16 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 04:02:37,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:02:37,331 INFO L225 Difference]: With dead ends: 29288 [2021-06-05 04:02:37,331 INFO L226 Difference]: Without dead ends: 29236 [2021-06-05 04:02:37,331 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 318.7ms TimeCoverageRelationStatistics Valid=150, Invalid=972, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 04:02:37,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29236 states. [2021-06-05 04:02:37,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29236 to 21774. [2021-06-05 04:02:37,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21774 states, 21773 states have (on average 2.624718688283654) internal successors, (57148), 21773 states have internal predecessors, (57148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:37,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21774 states to 21774 states and 57148 transitions. [2021-06-05 04:02:37,677 INFO L78 Accepts]: Start accepts. Automaton has 21774 states and 57148 transitions. Word has length 65 [2021-06-05 04:02:37,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:02:37,677 INFO L482 AbstractCegarLoop]: Abstraction has 21774 states and 57148 transitions. [2021-06-05 04:02:37,677 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 16 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:37,677 INFO L276 IsEmpty]: Start isEmpty. Operand 21774 states and 57148 transitions. [2021-06-05 04:02:37,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 04:02:37,689 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:02:37,689 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:02:37,889 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1560,706 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:02:37,889 INFO L430 AbstractCegarLoop]: === Iteration 715 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:02:37,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:02:37,889 INFO L82 PathProgramCache]: Analyzing trace with hash -1215410742, now seen corresponding path program 437 times [2021-06-05 04:02:37,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:02:37,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978178021] [2021-06-05 04:02:37,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:02:37,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:02:38,030 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 20 proven. 204 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:02:38,030 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:02:38,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978178021] [2021-06-05 04:02:38,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978178021] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:02:38,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437018751] [2021-06-05 04:02:38,030 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 707 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 707 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:02:38,061 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-06-05 04:02:38,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:02:38,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:02:38,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:02:38,266 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 17 proven. 207 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:02:38,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437018751] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:02:38,266 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:02:38,266 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 20 [2021-06-05 04:02:38,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704466401] [2021-06-05 04:02:38,266 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:02:38,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:02:38,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:02:38,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:02:38,266 INFO L87 Difference]: Start difference. First operand 21774 states and 57148 transitions. Second operand has 21 states, 21 states have (on average 3.857142857142857) internal successors, (81), 20 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:39,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:02:39,133 INFO L93 Difference]: Finished difference Result 21945 states and 57411 transitions. [2021-06-05 04:02:39,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:02:39,133 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.857142857142857) internal successors, (81), 20 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 04:02:39,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:02:39,157 INFO L225 Difference]: With dead ends: 21945 [2021-06-05 04:02:39,157 INFO L226 Difference]: Without dead ends: 21889 [2021-06-05 04:02:39,157 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 244.3ms TimeCoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:02:39,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21889 states. [2021-06-05 04:02:39,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21889 to 21774. [2021-06-05 04:02:39,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21774 states, 21773 states have (on average 2.623616405640013) internal successors, (57124), 21773 states have internal predecessors, (57124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:39,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21774 states to 21774 states and 57124 transitions. [2021-06-05 04:02:39,439 INFO L78 Accepts]: Start accepts. Automaton has 21774 states and 57124 transitions. Word has length 65 [2021-06-05 04:02:39,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:02:39,439 INFO L482 AbstractCegarLoop]: Abstraction has 21774 states and 57124 transitions. [2021-06-05 04:02:39,440 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.857142857142857) internal successors, (81), 20 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:39,440 INFO L276 IsEmpty]: Start isEmpty. Operand 21774 states and 57124 transitions. [2021-06-05 04:02:39,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 04:02:39,452 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:02:39,452 INFO L521 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:02:39,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 707 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1561 [2021-06-05 04:02:39,652 INFO L430 AbstractCegarLoop]: === Iteration 716 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:02:39,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:02:39,652 INFO L82 PathProgramCache]: Analyzing trace with hash 1171624209, now seen corresponding path program 220 times [2021-06-05 04:02:39,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:02:39,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272227910] [2021-06-05 04:02:39,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:02:39,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:02:39,747 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 65 proven. 160 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:02:39,748 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:02:39,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272227910] [2021-06-05 04:02:39,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272227910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:02:39,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21986439] [2021-06-05 04:02:39,748 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 708 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 708 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:02:39,774 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:02:39,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:02:39,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:02:39,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:02:39,868 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 66 proven. 160 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:02:39,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21986439] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:02:39,868 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:02:39,868 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 16 [2021-06-05 04:02:39,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164749328] [2021-06-05 04:02:39,869 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:02:39,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:02:39,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:02:39,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:02:39,869 INFO L87 Difference]: Start difference. First operand 21774 states and 57124 transitions. Second operand has 17 states, 17 states have (on average 4.0) internal successors, (68), 16 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:40,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:02:40,221 INFO L93 Difference]: Finished difference Result 24796 states and 63107 transitions. [2021-06-05 04:02:40,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:02:40,222 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.0) internal successors, (68), 16 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 04:02:40,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:02:40,248 INFO L225 Difference]: With dead ends: 24796 [2021-06-05 04:02:40,249 INFO L226 Difference]: Without dead ends: 24712 [2021-06-05 04:02:40,249 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 121.8ms TimeCoverageRelationStatistics Valid=121, Invalid=299, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:02:40,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24712 states. [2021-06-05 04:02:40,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24712 to 21012. [2021-06-05 04:02:40,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21012 states, 21011 states have (on average 2.6215791728142404) internal successors, (55082), 21011 states have internal predecessors, (55082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:40,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21012 states to 21012 states and 55082 transitions. [2021-06-05 04:02:40,527 INFO L78 Accepts]: Start accepts. Automaton has 21012 states and 55082 transitions. Word has length 65 [2021-06-05 04:02:40,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:02:40,527 INFO L482 AbstractCegarLoop]: Abstraction has 21012 states and 55082 transitions. [2021-06-05 04:02:40,528 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.0) internal successors, (68), 16 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:40,528 INFO L276 IsEmpty]: Start isEmpty. Operand 21012 states and 55082 transitions. [2021-06-05 04:02:40,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 04:02:40,539 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:02:40,539 INFO L521 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:02:40,739 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 708 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1562 [2021-06-05 04:02:40,739 INFO L430 AbstractCegarLoop]: === Iteration 717 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:02:40,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:02:40,739 INFO L82 PathProgramCache]: Analyzing trace with hash 1138119861, now seen corresponding path program 438 times [2021-06-05 04:02:40,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:02:40,739 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344511998] [2021-06-05 04:02:40,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:02:40,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:02:40,838 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 107 proven. 119 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:02:40,838 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:02:40,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344511998] [2021-06-05 04:02:40,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344511998] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:02:40,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264968159] [2021-06-05 04:02:40,838 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 709 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 709 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:02:40,870 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-06-05 04:02:40,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:02:40,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:02:40,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:02:40,962 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 107 proven. 119 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:02:40,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264968159] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:02:40,962 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:02:40,962 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-06-05 04:02:40,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028711888] [2021-06-05 04:02:40,962 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:02:40,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:02:40,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:02:40,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:02:40,963 INFO L87 Difference]: Start difference. First operand 21012 states and 55082 transitions. Second operand has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:41,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:02:41,282 INFO L93 Difference]: Finished difference Result 26195 states and 65415 transitions. [2021-06-05 04:02:41,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:02:41,283 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 04:02:41,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:02:41,314 INFO L225 Difference]: With dead ends: 26195 [2021-06-05 04:02:41,314 INFO L226 Difference]: Without dead ends: 26195 [2021-06-05 04:02:41,314 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 144.9ms TimeCoverageRelationStatistics Valid=192, Invalid=314, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:02:41,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26195 states. [2021-06-05 04:02:41,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26195 to 21493. [2021-06-05 04:02:41,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21493 states, 21492 states have (on average 2.6273031825795643) internal successors, (56466), 21492 states have internal predecessors, (56466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:41,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21493 states to 21493 states and 56466 transitions. [2021-06-05 04:02:41,623 INFO L78 Accepts]: Start accepts. Automaton has 21493 states and 56466 transitions. Word has length 65 [2021-06-05 04:02:41,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:02:41,623 INFO L482 AbstractCegarLoop]: Abstraction has 21493 states and 56466 transitions. [2021-06-05 04:02:41,623 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:41,623 INFO L276 IsEmpty]: Start isEmpty. Operand 21493 states and 56466 transitions. [2021-06-05 04:02:41,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 04:02:41,635 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:02:41,635 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:02:41,835 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1568,709 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:02:41,835 INFO L430 AbstractCegarLoop]: === Iteration 718 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:02:41,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:02:41,835 INFO L82 PathProgramCache]: Analyzing trace with hash 1830490658, now seen corresponding path program 221 times [2021-06-05 04:02:41,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:02:41,835 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134787039] [2021-06-05 04:02:41,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:02:41,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:02:41,953 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 9 proven. 215 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:02:41,953 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:02:41,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134787039] [2021-06-05 04:02:41,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134787039] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:02:41,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848822337] [2021-06-05 04:02:41,954 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 710 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 710 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:02:41,984 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-06-05 04:02:41,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:02:41,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:02:41,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:02:42,072 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 9 proven. 215 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:02:42,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848822337] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:02:42,072 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:02:42,072 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 04:02:42,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721993789] [2021-06-05 04:02:42,072 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:02:42,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:02:42,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:02:42,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:02:42,072 INFO L87 Difference]: Start difference. First operand 21493 states and 56466 transitions. Second operand has 16 states, 16 states have (on average 4.0625) internal successors, (65), 15 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:42,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:02:42,820 INFO L93 Difference]: Finished difference Result 26879 states and 68057 transitions. [2021-06-05 04:02:42,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 04:02:42,821 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.0625) internal successors, (65), 15 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 04:02:42,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:02:42,850 INFO L225 Difference]: With dead ends: 26879 [2021-06-05 04:02:42,850 INFO L226 Difference]: Without dead ends: 26865 [2021-06-05 04:02:42,850 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 265.0ms TimeCoverageRelationStatistics Valid=119, Invalid=811, Unknown=0, NotChecked=0, Total=930 [2021-06-05 04:02:42,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26865 states. [2021-06-05 04:02:43,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26865 to 21441. [2021-06-05 04:02:43,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21441 states, 21440 states have (on average 2.6294776119402985) internal successors, (56376), 21440 states have internal predecessors, (56376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:43,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21441 states to 21441 states and 56376 transitions. [2021-06-05 04:02:43,157 INFO L78 Accepts]: Start accepts. Automaton has 21441 states and 56376 transitions. Word has length 65 [2021-06-05 04:02:43,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:02:43,157 INFO L482 AbstractCegarLoop]: Abstraction has 21441 states and 56376 transitions. [2021-06-05 04:02:43,157 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.0625) internal successors, (65), 15 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:43,157 INFO L276 IsEmpty]: Start isEmpty. Operand 21441 states and 56376 transitions. [2021-06-05 04:02:43,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 04:02:43,168 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:02:43,168 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:02:43,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1569,710 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:02:43,368 INFO L430 AbstractCegarLoop]: === Iteration 719 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:02:43,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:02:43,368 INFO L82 PathProgramCache]: Analyzing trace with hash 1668438562, now seen corresponding path program 439 times [2021-06-05 04:02:43,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:02:43,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435495308] [2021-06-05 04:02:43,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:02:43,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:02:43,494 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 20 proven. 204 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:02:43,495 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:02:43,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435495308] [2021-06-05 04:02:43,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435495308] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:02:43,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153092822] [2021-06-05 04:02:43,495 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 711 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 711 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:02:43,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:02:43,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:02:43,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:02:43,693 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 17 proven. 207 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:02:43,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153092822] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:02:43,693 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:02:43,693 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 18 [2021-06-05 04:02:43,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180486555] [2021-06-05 04:02:43,693 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:02:43,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:02:43,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:02:43,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:02:43,694 INFO L87 Difference]: Start difference. First operand 21441 states and 56376 transitions. Second operand has 19 states, 19 states have (on average 4.105263157894737) internal successors, (78), 18 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:44,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:02:44,345 INFO L93 Difference]: Finished difference Result 21594 states and 56609 transitions. [2021-06-05 04:02:44,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:02:44,345 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.105263157894737) internal successors, (78), 18 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 04:02:44,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:02:44,368 INFO L225 Difference]: With dead ends: 21594 [2021-06-05 04:02:44,368 INFO L226 Difference]: Without dead ends: 21550 [2021-06-05 04:02:44,368 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 65 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 201.6ms TimeCoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:02:44,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21550 states. [2021-06-05 04:02:44,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21550 to 21441. [2021-06-05 04:02:44,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21441 states, 21440 states have (on average 2.6286380597014927) internal successors, (56358), 21440 states have internal predecessors, (56358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:44,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21441 states to 21441 states and 56358 transitions. [2021-06-05 04:02:44,691 INFO L78 Accepts]: Start accepts. Automaton has 21441 states and 56358 transitions. Word has length 65 [2021-06-05 04:02:44,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:02:44,691 INFO L482 AbstractCegarLoop]: Abstraction has 21441 states and 56358 transitions. [2021-06-05 04:02:44,691 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.105263157894737) internal successors, (78), 18 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:44,691 INFO L276 IsEmpty]: Start isEmpty. Operand 21441 states and 56358 transitions. [2021-06-05 04:02:44,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 04:02:44,702 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:02:44,702 INFO L521 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:02:44,902 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1570,711 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:02:44,902 INFO L430 AbstractCegarLoop]: === Iteration 720 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:02:44,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:02:44,903 INFO L82 PathProgramCache]: Analyzing trace with hash -312259115, now seen corresponding path program 222 times [2021-06-05 04:02:44,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:02:44,903 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916197833] [2021-06-05 04:02:44,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:02:44,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:02:45,011 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 79 proven. 147 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:02:45,012 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:02:45,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916197833] [2021-06-05 04:02:45,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916197833] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:02:45,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571740825] [2021-06-05 04:02:45,012 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 712 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 712 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:02:45,047 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-05 04:02:45,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:02:45,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:02:45,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:02:45,174 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 81 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:02:45,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571740825] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:02:45,175 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:02:45,175 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 18] total 21 [2021-06-05 04:02:45,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418087627] [2021-06-05 04:02:45,175 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:02:45,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:02:45,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:02:45,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=339, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:02:45,175 INFO L87 Difference]: Start difference. First operand 21441 states and 56358 transitions. Second operand has 22 states, 22 states have (on average 4.136363636363637) internal successors, (91), 21 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:45,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:02:45,498 INFO L93 Difference]: Finished difference Result 24012 states and 61505 transitions. [2021-06-05 04:02:45,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:02:45,498 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.136363636363637) internal successors, (91), 21 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 04:02:45,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:02:45,525 INFO L225 Difference]: With dead ends: 24012 [2021-06-05 04:02:45,525 INFO L226 Difference]: Without dead ends: 23928 [2021-06-05 04:02:45,525 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 160.8ms TimeCoverageRelationStatistics Valid=158, Invalid=492, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:02:45,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23928 states. [2021-06-05 04:02:45,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23928 to 20184. [2021-06-05 04:02:45,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20184 states, 20183 states have (on average 2.6291433384531535) internal successors, (53064), 20183 states have internal predecessors, (53064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:45,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20184 states to 20184 states and 53064 transitions. [2021-06-05 04:02:45,806 INFO L78 Accepts]: Start accepts. Automaton has 20184 states and 53064 transitions. Word has length 65 [2021-06-05 04:02:45,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:02:45,806 INFO L482 AbstractCegarLoop]: Abstraction has 20184 states and 53064 transitions. [2021-06-05 04:02:45,806 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.136363636363637) internal successors, (91), 21 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:45,806 INFO L276 IsEmpty]: Start isEmpty. Operand 20184 states and 53064 transitions. [2021-06-05 04:02:45,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 04:02:45,817 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:02:45,817 INFO L521 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:02:46,017 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1571,712 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:02:46,017 INFO L430 AbstractCegarLoop]: === Iteration 721 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:02:46,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:02:46,018 INFO L82 PathProgramCache]: Analyzing trace with hash 1318761239, now seen corresponding path program 440 times [2021-06-05 04:02:46,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:02:46,018 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486897237] [2021-06-05 04:02:46,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:02:46,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:02:46,107 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 105 proven. 121 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:02:46,108 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:02:46,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486897237] [2021-06-05 04:02:46,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486897237] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:02:46,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657116953] [2021-06-05 04:02:46,108 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 713 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 713 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:02:46,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:02:46,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:02:46,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:02:46,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:02:46,226 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 105 proven. 121 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:02:46,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657116953] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:02:46,226 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:02:46,226 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-06-05 04:02:46,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646004821] [2021-06-05 04:02:46,226 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:02:46,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:02:46,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:02:46,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:02:46,227 INFO L87 Difference]: Start difference. First operand 20184 states and 53064 transitions. Second operand has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:46,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:02:46,532 INFO L93 Difference]: Finished difference Result 25315 states and 63137 transitions. [2021-06-05 04:02:46,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:02:46,532 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 04:02:46,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:02:46,563 INFO L225 Difference]: With dead ends: 25315 [2021-06-05 04:02:46,564 INFO L226 Difference]: Without dead ends: 25315 [2021-06-05 04:02:46,564 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 117.7ms TimeCoverageRelationStatistics Valid=150, Invalid=230, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:02:46,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25315 states. [2021-06-05 04:02:46,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25315 to 20731. [2021-06-05 04:02:46,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20731 states, 20730 states have (on average 2.6376748673420165) internal successors, (54679), 20730 states have internal predecessors, (54679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:46,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20731 states to 20731 states and 54679 transitions. [2021-06-05 04:02:46,859 INFO L78 Accepts]: Start accepts. Automaton has 20731 states and 54679 transitions. Word has length 65 [2021-06-05 04:02:46,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:02:46,859 INFO L482 AbstractCegarLoop]: Abstraction has 20731 states and 54679 transitions. [2021-06-05 04:02:46,859 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:46,859 INFO L276 IsEmpty]: Start isEmpty. Operand 20731 states and 54679 transitions. [2021-06-05 04:02:46,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 04:02:46,871 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:02:46,871 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:02:47,079 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 713 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1577 [2021-06-05 04:02:47,079 INFO L430 AbstractCegarLoop]: === Iteration 722 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:02:47,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:02:47,079 INFO L82 PathProgramCache]: Analyzing trace with hash -1422618358, now seen corresponding path program 223 times [2021-06-05 04:02:47,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:02:47,079 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452748799] [2021-06-05 04:02:47,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:02:47,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:02:47,190 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 9 proven. 215 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:02:47,190 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:02:47,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452748799] [2021-06-05 04:02:47,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452748799] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:02:47,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321747911] [2021-06-05 04:02:47,190 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 714 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 714 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:02:47,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:02:47,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:02:47,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:02:47,308 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 9 proven. 215 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:02:47,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321747911] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:02:47,308 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:02:47,308 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 04:02:47,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004520758] [2021-06-05 04:02:47,308 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:02:47,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:02:47,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:02:47,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:02:47,309 INFO L87 Difference]: Start difference. First operand 20731 states and 54679 transitions. Second operand has 15 states, 15 states have (on average 4.333333333333333) internal successors, (65), 14 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:48,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:02:48,039 INFO L93 Difference]: Finished difference Result 24119 states and 61849 transitions. [2021-06-05 04:02:48,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:02:48,039 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.333333333333333) internal successors, (65), 14 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 04:02:48,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:02:48,067 INFO L225 Difference]: With dead ends: 24119 [2021-06-05 04:02:48,067 INFO L226 Difference]: Without dead ends: 24105 [2021-06-05 04:02:48,067 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 69 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 227.9ms TimeCoverageRelationStatistics Valid=94, Invalid=662, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:02:48,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24105 states. [2021-06-05 04:02:48,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24105 to 20750. [2021-06-05 04:02:48,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20750 states, 20749 states have (on average 2.638199431297894) internal successors, (54740), 20749 states have internal predecessors, (54740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:48,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20750 states to 20750 states and 54740 transitions. [2021-06-05 04:02:48,335 INFO L78 Accepts]: Start accepts. Automaton has 20750 states and 54740 transitions. Word has length 65 [2021-06-05 04:02:48,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:02:48,335 INFO L482 AbstractCegarLoop]: Abstraction has 20750 states and 54740 transitions. [2021-06-05 04:02:48,335 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.333333333333333) internal successors, (65), 14 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:48,335 INFO L276 IsEmpty]: Start isEmpty. Operand 20750 states and 54740 transitions. [2021-06-05 04:02:48,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 04:02:48,346 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:02:48,346 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:02:48,547 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 714 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1578 [2021-06-05 04:02:48,547 INFO L430 AbstractCegarLoop]: === Iteration 723 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:02:48,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:02:48,547 INFO L82 PathProgramCache]: Analyzing trace with hash -1599509302, now seen corresponding path program 441 times [2021-06-05 04:02:48,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:02:48,547 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825308027] [2021-06-05 04:02:48,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:02:48,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:02:48,661 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 20 proven. 204 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:02:48,661 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:02:48,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825308027] [2021-06-05 04:02:48,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825308027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:02:48,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063692128] [2021-06-05 04:02:48,661 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 715 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 715 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:02:48,693 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-06-05 04:02:48,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:02:48,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:02:48,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:02:48,837 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 17 proven. 207 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:02:48,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063692128] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:02:48,837 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:02:48,837 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 16 [2021-06-05 04:02:48,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640231177] [2021-06-05 04:02:48,837 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:02:48,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:02:48,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:02:48,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:02:48,837 INFO L87 Difference]: Start difference. First operand 20750 states and 54740 transitions. Second operand has 17 states, 17 states have (on average 4.411764705882353) internal successors, (75), 16 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:49,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:02:49,310 INFO L93 Difference]: Finished difference Result 20799 states and 54815 transitions. [2021-06-05 04:02:49,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:02:49,310 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.411764705882353) internal successors, (75), 16 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 04:02:49,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:02:49,332 INFO L225 Difference]: With dead ends: 20799 [2021-06-05 04:02:49,332 INFO L226 Difference]: Without dead ends: 20767 [2021-06-05 04:02:49,332 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 144.2ms TimeCoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:02:49,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20767 states. [2021-06-05 04:02:49,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20767 to 20750. [2021-06-05 04:02:49,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20750 states, 20749 states have (on average 2.637910260735457) internal successors, (54734), 20749 states have internal predecessors, (54734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:49,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20750 states to 20750 states and 54734 transitions. [2021-06-05 04:02:49,581 INFO L78 Accepts]: Start accepts. Automaton has 20750 states and 54734 transitions. Word has length 65 [2021-06-05 04:02:49,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:02:49,581 INFO L482 AbstractCegarLoop]: Abstraction has 20750 states and 54734 transitions. [2021-06-05 04:02:49,581 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.411764705882353) internal successors, (75), 16 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:49,581 INFO L276 IsEmpty]: Start isEmpty. Operand 20750 states and 54734 transitions. [2021-06-05 04:02:49,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 04:02:49,593 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:02:49,593 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:02:49,793 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1579,715 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:02:49,793 INFO L430 AbstractCegarLoop]: === Iteration 724 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:02:49,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:02:49,793 INFO L82 PathProgramCache]: Analyzing trace with hash 1000192802, now seen corresponding path program 224 times [2021-06-05 04:02:49,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:02:49,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579294137] [2021-06-05 04:02:49,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:02:49,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:02:49,900 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 9 proven. 215 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:02:49,901 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:02:49,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579294137] [2021-06-05 04:02:49,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579294137] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:02:49,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543956197] [2021-06-05 04:02:49,901 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 716 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 716 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:02:49,929 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:02:49,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:02:49,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:02:49,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:02:50,027 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 9 proven. 215 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:02:50,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543956197] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:02:50,028 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:02:50,028 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 04:02:50,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727544778] [2021-06-05 04:02:50,028 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:02:50,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:02:50,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:02:50,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:02:50,028 INFO L87 Difference]: Start difference. First operand 20750 states and 54734 transitions. Second operand has 14 states, 14 states have (on average 4.642857142857143) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:50,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:02:50,712 INFO L93 Difference]: Finished difference Result 22551 states and 58437 transitions. [2021-06-05 04:02:50,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:02:50,713 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.642857142857143) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 04:02:50,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:02:50,737 INFO L225 Difference]: With dead ends: 22551 [2021-06-05 04:02:50,737 INFO L226 Difference]: Without dead ends: 22551 [2021-06-05 04:02:50,738 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 70 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 206.1ms TimeCoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:02:50,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22551 states. [2021-06-05 04:02:50,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22551 to 20788. [2021-06-05 04:02:51,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20788 states, 20787 states have (on average 2.6378986866791743) internal successors, (54834), 20787 states have internal predecessors, (54834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:51,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20788 states to 20788 states and 54834 transitions. [2021-06-05 04:02:51,036 INFO L78 Accepts]: Start accepts. Automaton has 20788 states and 54834 transitions. Word has length 65 [2021-06-05 04:02:51,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:02:51,036 INFO L482 AbstractCegarLoop]: Abstraction has 20788 states and 54834 transitions. [2021-06-05 04:02:51,037 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.642857142857143) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:51,037 INFO L276 IsEmpty]: Start isEmpty. Operand 20788 states and 54834 transitions. [2021-06-05 04:02:51,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 04:02:51,048 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:02:51,048 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:02:51,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1580,716 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:02:51,248 INFO L430 AbstractCegarLoop]: === Iteration 725 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:02:51,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:02:51,249 INFO L82 PathProgramCache]: Analyzing trace with hash -633103582, now seen corresponding path program 442 times [2021-06-05 04:02:51,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:02:51,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169383835] [2021-06-05 04:02:51,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:02:51,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:02:51,353 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 20 proven. 204 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:02:51,353 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:02:51,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169383835] [2021-06-05 04:02:51,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169383835] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:02:51,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450267885] [2021-06-05 04:02:51,354 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 717 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 717 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:02:51,381 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:02:51,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:02:51,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:02:51,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:02:51,501 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 17 proven. 207 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:02:51,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450267885] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:02:51,502 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:02:51,502 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-06-05 04:02:51,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898036365] [2021-06-05 04:02:51,502 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:02:51,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:02:51,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:02:51,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:02:51,502 INFO L87 Difference]: Start difference. First operand 20788 states and 54834 transitions. Second operand has 15 states, 15 states have (on average 4.8) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:51,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:02:51,943 INFO L93 Difference]: Finished difference Result 20856 states and 54933 transitions. [2021-06-05 04:02:51,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:02:51,944 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.8) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 04:02:51,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:02:51,967 INFO L225 Difference]: With dead ends: 20856 [2021-06-05 04:02:51,967 INFO L226 Difference]: Without dead ends: 20836 [2021-06-05 04:02:51,967 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 69 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 127.5ms TimeCoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:02:51,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20836 states. [2021-06-05 04:02:52,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20836 to 20788. [2021-06-05 04:02:52,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20788 states, 20787 states have (on average 2.6377543657093376) internal successors, (54831), 20787 states have internal predecessors, (54831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:52,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20788 states to 20788 states and 54831 transitions. [2021-06-05 04:02:52,256 INFO L78 Accepts]: Start accepts. Automaton has 20788 states and 54831 transitions. Word has length 65 [2021-06-05 04:02:52,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:02:52,256 INFO L482 AbstractCegarLoop]: Abstraction has 20788 states and 54831 transitions. [2021-06-05 04:02:52,256 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.8) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:52,256 INFO L276 IsEmpty]: Start isEmpty. Operand 20788 states and 54831 transitions. [2021-06-05 04:02:52,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 04:02:52,268 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:02:52,268 INFO L521 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:02:52,468 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1581,717 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:02:52,468 INFO L430 AbstractCegarLoop]: === Iteration 726 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:02:52,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:02:52,469 INFO L82 PathProgramCache]: Analyzing trace with hash 920484117, now seen corresponding path program 225 times [2021-06-05 04:02:52,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:02:52,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773155904] [2021-06-05 04:02:52,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:02:52,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:02:52,561 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 99 proven. 127 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:02:52,561 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:02:52,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773155904] [2021-06-05 04:02:52,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773155904] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:02:52,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188556335] [2021-06-05 04:02:52,562 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 718 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 718 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:02:52,594 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-05 04:02:52,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:02:52,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:02:52,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:02:52,695 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 100 proven. 127 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:02:52,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188556335] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:02:52,695 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:02:52,695 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 14 [2021-06-05 04:02:52,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437867344] [2021-06-05 04:02:52,695 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:02:52,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:02:52,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:02:52,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:02:52,696 INFO L87 Difference]: Start difference. First operand 20788 states and 54831 transitions. Second operand has 15 states, 15 states have (on average 4.533333333333333) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:52,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:02:52,949 INFO L93 Difference]: Finished difference Result 22145 states and 57471 transitions. [2021-06-05 04:02:52,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:02:52,949 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.533333333333333) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 04:02:52,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:02:52,973 INFO L225 Difference]: With dead ends: 22145 [2021-06-05 04:02:52,973 INFO L226 Difference]: Without dead ends: 22123 [2021-06-05 04:02:52,973 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 106.1ms TimeCoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:02:52,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22123 states. [2021-06-05 04:02:53,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22123 to 20716. [2021-06-05 04:02:53,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20716 states, 20715 states have (on average 2.6394882935071204) internal successors, (54677), 20715 states have internal predecessors, (54677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:53,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20716 states to 20716 states and 54677 transitions. [2021-06-05 04:02:53,256 INFO L78 Accepts]: Start accepts. Automaton has 20716 states and 54677 transitions. Word has length 65 [2021-06-05 04:02:53,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:02:53,256 INFO L482 AbstractCegarLoop]: Abstraction has 20716 states and 54677 transitions. [2021-06-05 04:02:53,256 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.533333333333333) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:53,257 INFO L276 IsEmpty]: Start isEmpty. Operand 20716 states and 54677 transitions. [2021-06-05 04:02:53,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 04:02:53,268 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:02:53,268 INFO L521 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:02:53,468 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1582,718 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:02:53,468 INFO L430 AbstractCegarLoop]: === Iteration 727 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:02:53,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:02:53,468 INFO L82 PathProgramCache]: Analyzing trace with hash 2097876951, now seen corresponding path program 443 times [2021-06-05 04:02:53,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:02:53,468 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641318612] [2021-06-05 04:02:53,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:02:53,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:02:53,547 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 101 proven. 125 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:02:53,547 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:02:53,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641318612] [2021-06-05 04:02:53,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641318612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:02:53,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607146048] [2021-06-05 04:02:53,547 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 719 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 719 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:02:53,578 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-06-05 04:02:53,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:02:53,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:02:53,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:02:53,698 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 103 proven. 125 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:02:53,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607146048] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:02:53,698 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:02:53,698 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 16 [2021-06-05 04:02:53,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075121098] [2021-06-05 04:02:53,699 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:02:53,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:02:53,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:02:53,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:02:53,699 INFO L87 Difference]: Start difference. First operand 20716 states and 54677 transitions. Second operand has 17 states, 17 states have (on average 4.588235294117647) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:53,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:02:53,950 INFO L93 Difference]: Finished difference Result 27087 states and 67677 transitions. [2021-06-05 04:02:53,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:02:53,951 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.588235294117647) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 04:02:53,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:02:53,986 INFO L225 Difference]: With dead ends: 27087 [2021-06-05 04:02:53,986 INFO L226 Difference]: Without dead ends: 27087 [2021-06-05 04:02:53,987 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 107.2ms TimeCoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:02:54,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27087 states. [2021-06-05 04:02:54,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27087 to 21886. [2021-06-05 04:02:54,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21886 states, 21885 states have (on average 2.653506968243089) internal successors, (58072), 21885 states have internal predecessors, (58072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:54,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21886 states to 21886 states and 58072 transitions. [2021-06-05 04:02:54,311 INFO L78 Accepts]: Start accepts. Automaton has 21886 states and 58072 transitions. Word has length 65 [2021-06-05 04:02:54,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:02:54,311 INFO L482 AbstractCegarLoop]: Abstraction has 21886 states and 58072 transitions. [2021-06-05 04:02:54,311 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.588235294117647) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:54,311 INFO L276 IsEmpty]: Start isEmpty. Operand 21886 states and 58072 transitions. [2021-06-05 04:02:54,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 04:02:54,324 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:02:54,324 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:02:54,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 719 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1586 [2021-06-05 04:02:54,525 INFO L430 AbstractCegarLoop]: === Iteration 728 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:02:54,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:02:54,525 INFO L82 PathProgramCache]: Analyzing trace with hash 1859815434, now seen corresponding path program 226 times [2021-06-05 04:02:54,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:02:54,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607638074] [2021-06-05 04:02:54,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:02:54,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:02:54,623 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 9 proven. 215 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:02:54,623 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:02:54,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607638074] [2021-06-05 04:02:54,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607638074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:02:54,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957172356] [2021-06-05 04:02:54,623 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 720 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 720 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:02:54,650 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:02:54,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:02:54,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:02:54,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:02:54,736 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 9 proven. 215 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:02:54,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957172356] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:02:54,736 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:02:54,737 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 04:02:54,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107746749] [2021-06-05 04:02:54,737 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:02:54,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:02:54,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:02:54,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:02:54,737 INFO L87 Difference]: Start difference. First operand 21886 states and 58072 transitions. Second operand has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 12 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:55,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:02:55,501 INFO L93 Difference]: Finished difference Result 22932 states and 60117 transitions. [2021-06-05 04:02:55,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:02:55,501 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 12 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 04:02:55,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:02:55,521 INFO L225 Difference]: With dead ends: 22932 [2021-06-05 04:02:55,521 INFO L226 Difference]: Without dead ends: 22924 [2021-06-05 04:02:55,521 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 159.7ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:02:55,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22924 states. [2021-06-05 04:02:55,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22924 to 21981. [2021-06-05 04:02:55,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21981 states, 21980 states have (on average 2.652092811646952) internal successors, (58293), 21980 states have internal predecessors, (58293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:55,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21981 states to 21981 states and 58293 transitions. [2021-06-05 04:02:55,800 INFO L78 Accepts]: Start accepts. Automaton has 21981 states and 58293 transitions. Word has length 65 [2021-06-05 04:02:55,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:02:55,800 INFO L482 AbstractCegarLoop]: Abstraction has 21981 states and 58293 transitions. [2021-06-05 04:02:55,800 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 12 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:55,800 INFO L276 IsEmpty]: Start isEmpty. Operand 21981 states and 58293 transitions. [2021-06-05 04:02:55,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 04:02:55,813 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:02:55,813 INFO L521 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:02:56,014 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1587,720 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:02:56,014 INFO L430 AbstractCegarLoop]: === Iteration 729 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:02:56,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:02:56,014 INFO L82 PathProgramCache]: Analyzing trace with hash 306118577, now seen corresponding path program 444 times [2021-06-05 04:02:56,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:02:56,014 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189794462] [2021-06-05 04:02:56,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:02:56,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:02:56,091 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 119 proven. 107 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:02:56,091 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:02:56,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189794462] [2021-06-05 04:02:56,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189794462] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:02:56,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354616924] [2021-06-05 04:02:56,092 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 721 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 721 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:02:56,123 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-06-05 04:02:56,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:02:56,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:02:56,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:02:56,208 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 119 proven. 107 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:02:56,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354616924] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:02:56,208 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:02:56,208 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-06-05 04:02:56,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700084170] [2021-06-05 04:02:56,208 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:02:56,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:02:56,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:02:56,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:02:56,209 INFO L87 Difference]: Start difference. First operand 21981 states and 58293 transitions. Second operand has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:56,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:02:56,412 INFO L93 Difference]: Finished difference Result 26441 states and 66274 transitions. [2021-06-05 04:02:56,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:02:56,413 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 04:02:56,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:02:56,445 INFO L225 Difference]: With dead ends: 26441 [2021-06-05 04:02:56,445 INFO L226 Difference]: Without dead ends: 26438 [2021-06-05 04:02:56,445 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 70.1ms TimeCoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:02:56,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26438 states. [2021-06-05 04:02:56,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26438 to 21980. [2021-06-05 04:02:56,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21980 states, 21979 states have (on average 2.651803994722235) internal successors, (58284), 21979 states have internal predecessors, (58284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:56,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21980 states to 21980 states and 58284 transitions. [2021-06-05 04:02:56,782 INFO L78 Accepts]: Start accepts. Automaton has 21980 states and 58284 transitions. Word has length 65 [2021-06-05 04:02:56,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:02:56,782 INFO L482 AbstractCegarLoop]: Abstraction has 21980 states and 58284 transitions. [2021-06-05 04:02:56,782 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:56,783 INFO L276 IsEmpty]: Start isEmpty. Operand 21980 states and 58284 transitions. [2021-06-05 04:02:56,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 04:02:56,796 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:02:56,796 INFO L521 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:02:56,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 721 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1588 [2021-06-05 04:02:56,997 INFO L430 AbstractCegarLoop]: === Iteration 730 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:02:56,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:02:56,997 INFO L82 PathProgramCache]: Analyzing trace with hash 513181143, now seen corresponding path program 445 times [2021-06-05 04:02:56,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:02:56,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328926547] [2021-06-05 04:02:56,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:02:56,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:02:57,086 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 110 proven. 115 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:02:57,086 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:02:57,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328926547] [2021-06-05 04:02:57,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328926547] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:02:57,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775714897] [2021-06-05 04:02:57,086 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 722 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 722 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:02:57,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:02:57,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:02:57,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:02:57,200 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 110 proven. 115 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:02:57,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775714897] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:02:57,201 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:02:57,201 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-06-05 04:02:57,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321437800] [2021-06-05 04:02:57,201 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:02:57,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:02:57,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:02:57,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:02:57,201 INFO L87 Difference]: Start difference. First operand 21980 states and 58284 transitions. Second operand has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:57,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:02:57,410 INFO L93 Difference]: Finished difference Result 26013 states and 65807 transitions. [2021-06-05 04:02:57,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:02:57,411 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 04:02:57,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:02:57,443 INFO L225 Difference]: With dead ends: 26013 [2021-06-05 04:02:57,443 INFO L226 Difference]: Without dead ends: 26001 [2021-06-05 04:02:57,443 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 83.7ms TimeCoverageRelationStatistics Valid=86, Invalid=124, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:02:57,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26001 states. [2021-06-05 04:02:57,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26001 to 21980. [2021-06-05 04:02:57,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21980 states, 21979 states have (on average 2.6516675007962145) internal successors, (58281), 21979 states have internal predecessors, (58281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:57,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21980 states to 21980 states and 58281 transitions. [2021-06-05 04:02:57,762 INFO L78 Accepts]: Start accepts. Automaton has 21980 states and 58281 transitions. Word has length 65 [2021-06-05 04:02:57,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:02:57,763 INFO L482 AbstractCegarLoop]: Abstraction has 21980 states and 58281 transitions. [2021-06-05 04:02:57,763 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:57,763 INFO L276 IsEmpty]: Start isEmpty. Operand 21980 states and 58281 transitions. [2021-06-05 04:02:57,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 04:02:57,776 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:02:57,776 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:02:57,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1590,722 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:02:57,976 INFO L430 AbstractCegarLoop]: === Iteration 731 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:02:57,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:02:57,976 INFO L82 PathProgramCache]: Analyzing trace with hash -934818870, now seen corresponding path program 446 times [2021-06-05 04:02:57,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:02:57,976 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954062351] [2021-06-05 04:02:57,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:02:57,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:02:58,068 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 21 proven. 203 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:02:58,068 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:02:58,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954062351] [2021-06-05 04:02:58,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954062351] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:02:58,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623625522] [2021-06-05 04:02:58,068 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 723 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 723 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:02:58,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:02:58,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:02:58,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 04:02:58,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:02:58,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:02:58,187 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:02:58,189 INFO L628 ElimStorePlain]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 04:02:58,189 INFO L518 ElimStorePlain]: Eliminatee B vanished before elimination [2021-06-05 04:02:58,192 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:02:58,192 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:19, output treesize:1 [2021-06-05 04:02:58,198 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 21 proven. 203 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:02:58,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623625522] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:02:58,198 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:02:58,199 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 04:02:58,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562774831] [2021-06-05 04:02:58,199 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:02:58,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:02:58,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:02:58,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:02:58,199 INFO L87 Difference]: Start difference. First operand 21980 states and 58281 transitions. Second operand has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 11 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:58,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:02:58,627 INFO L93 Difference]: Finished difference Result 22458 states and 59145 transitions. [2021-06-05 04:02:58,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:02:58,628 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 11 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 04:02:58,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:02:58,654 INFO L225 Difference]: With dead ends: 22458 [2021-06-05 04:02:58,655 INFO L226 Difference]: Without dead ends: 22436 [2021-06-05 04:02:58,655 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 70 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 90.6ms TimeCoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:02:58,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22436 states. [2021-06-05 04:02:58,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22436 to 21978. [2021-06-05 04:02:58,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21978 states, 21977 states have (on average 2.651453792601356) internal successors, (58271), 21977 states have internal predecessors, (58271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:58,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21978 states to 21978 states and 58271 transitions. [2021-06-05 04:02:58,947 INFO L78 Accepts]: Start accepts. Automaton has 21978 states and 58271 transitions. Word has length 65 [2021-06-05 04:02:58,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:02:58,947 INFO L482 AbstractCegarLoop]: Abstraction has 21978 states and 58271 transitions. [2021-06-05 04:02:58,948 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 11 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:58,948 INFO L276 IsEmpty]: Start isEmpty. Operand 21978 states and 58271 transitions. [2021-06-05 04:02:58,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 04:02:58,961 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:02:58,961 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:02:59,161 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1593,723 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:02:59,161 INFO L430 AbstractCegarLoop]: === Iteration 732 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:02:59,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:02:59,161 INFO L82 PathProgramCache]: Analyzing trace with hash -1548355050, now seen corresponding path program 447 times [2021-06-05 04:02:59,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:02:59,162 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793190307] [2021-06-05 04:02:59,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:02:59,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:02:59,261 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 19 proven. 204 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:02:59,261 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:02:59,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793190307] [2021-06-05 04:02:59,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793190307] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:02:59,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579272903] [2021-06-05 04:02:59,262 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 724 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 724 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:02:59,292 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-06-05 04:02:59,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:02:59,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:02:59,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:02:59,380 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 205 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:02:59,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579272903] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:02:59,380 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:02:59,380 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 04:02:59,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671081510] [2021-06-05 04:02:59,380 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:02:59,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:02:59,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:02:59,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:02:59,380 INFO L87 Difference]: Start difference. First operand 21978 states and 58271 transitions. Second operand has 13 states, 13 states have (on average 5.0) internal successors, (65), 12 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:59,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:02:59,964 INFO L93 Difference]: Finished difference Result 22884 states and 60025 transitions. [2021-06-05 04:02:59,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:02:59,964 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.0) internal successors, (65), 12 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 04:02:59,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:02:59,990 INFO L225 Difference]: With dead ends: 22884 [2021-06-05 04:02:59,990 INFO L226 Difference]: Without dead ends: 22884 [2021-06-05 04:02:59,990 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 162.2ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:03:00,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22884 states. [2021-06-05 04:03:00,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22884 to 21980. [2021-06-05 04:03:00,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21980 states, 21979 states have (on average 2.651394512944174) internal successors, (58275), 21979 states have internal predecessors, (58275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:00,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21980 states to 21980 states and 58275 transitions. [2021-06-05 04:03:00,304 INFO L78 Accepts]: Start accepts. Automaton has 21980 states and 58275 transitions. Word has length 65 [2021-06-05 04:03:00,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:00,305 INFO L482 AbstractCegarLoop]: Abstraction has 21980 states and 58275 transitions. [2021-06-05 04:03:00,305 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.0) internal successors, (65), 12 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:00,305 INFO L276 IsEmpty]: Start isEmpty. Operand 21980 states and 58275 transitions. [2021-06-05 04:03:00,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 04:03:00,319 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:00,319 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:00,519 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 724 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1594 [2021-06-05 04:03:00,519 INFO L430 AbstractCegarLoop]: === Iteration 733 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:00,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:00,519 INFO L82 PathProgramCache]: Analyzing trace with hash 593562284, now seen corresponding path program 448 times [2021-06-05 04:03:00,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:00,519 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122442127] [2021-06-05 04:03:00,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:00,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:00,619 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 19 proven. 205 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:03:00,619 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:00,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122442127] [2021-06-05 04:03:00,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122442127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:00,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640733884] [2021-06-05 04:03:00,619 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 725 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 725 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:00,646 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:03:00,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:00,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 04:03:00,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:00,744 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:03:00,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2021-06-05 04:03:00,745 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:03:00,746 INFO L628 ElimStorePlain]: treesize reduction 20, result has 4.8 percent of original size [2021-06-05 04:03:00,746 INFO L518 ElimStorePlain]: Eliminatee B vanished before elimination [2021-06-05 04:03:00,747 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:03:00,747 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:1 [2021-06-05 04:03:00,753 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 22 proven. 202 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:03:00,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640733884] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:00,753 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:00,753 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-06-05 04:03:00,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481380206] [2021-06-05 04:03:00,753 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:03:00,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:00,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:03:00,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:03:00,753 INFO L87 Difference]: Start difference. First operand 21980 states and 58275 transitions. Second operand has 16 states, 16 states have (on average 4.25) internal successors, (68), 15 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:01,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:01,746 INFO L93 Difference]: Finished difference Result 24662 states and 63743 transitions. [2021-06-05 04:03:01,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 04:03:01,747 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.25) internal successors, (68), 15 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 04:03:01,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:01,778 INFO L225 Difference]: With dead ends: 24662 [2021-06-05 04:03:01,778 INFO L226 Difference]: Without dead ends: 24662 [2021-06-05 04:03:01,778 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 315.5ms TimeCoverageRelationStatistics Valid=159, Invalid=1323, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 04:03:01,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24662 states. [2021-06-05 04:03:02,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24662 to 22171. [2021-06-05 04:03:02,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22171 states, 22170 states have (on average 2.6508344609833108) internal successors, (58769), 22170 states have internal predecessors, (58769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:02,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22171 states to 22171 states and 58769 transitions. [2021-06-05 04:03:02,097 INFO L78 Accepts]: Start accepts. Automaton has 22171 states and 58769 transitions. Word has length 65 [2021-06-05 04:03:02,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:02,097 INFO L482 AbstractCegarLoop]: Abstraction has 22171 states and 58769 transitions. [2021-06-05 04:03:02,097 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.25) internal successors, (68), 15 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:02,097 INFO L276 IsEmpty]: Start isEmpty. Operand 22171 states and 58769 transitions. [2021-06-05 04:03:02,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 04:03:02,110 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:02,110 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:02,310 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 725 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1595 [2021-06-05 04:03:02,311 INFO L430 AbstractCegarLoop]: === Iteration 734 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:02,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:02,311 INFO L82 PathProgramCache]: Analyzing trace with hash 1798568620, now seen corresponding path program 227 times [2021-06-05 04:03:02,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:02,311 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773120229] [2021-06-05 04:03:02,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:02,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:02,413 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 28 proven. 196 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:03:02,413 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:02,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773120229] [2021-06-05 04:03:02,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773120229] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:02,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240835749] [2021-06-05 04:03:02,413 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 726 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 726 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:02,447 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-06-05 04:03:02,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:02,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:03:02,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:02,556 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 26 proven. 198 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:03:02,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240835749] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:02,556 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:02,556 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-06-05 04:03:02,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963501022] [2021-06-05 04:03:02,556 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:03:02,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:02,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:03:02,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:03:02,557 INFO L87 Difference]: Start difference. First operand 22171 states and 58769 transitions. Second operand has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:03,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:03,430 INFO L93 Difference]: Finished difference Result 22721 states and 59768 transitions. [2021-06-05 04:03:03,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:03:03,430 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 04:03:03,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:03,456 INFO L225 Difference]: With dead ends: 22721 [2021-06-05 04:03:03,456 INFO L226 Difference]: Without dead ends: 22690 [2021-06-05 04:03:03,456 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 69 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 209.9ms TimeCoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:03:03,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22690 states. [2021-06-05 04:03:03,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22690 to 22172. [2021-06-05 04:03:03,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22172 states, 22171 states have (on average 2.6505795859456045) internal successors, (58766), 22171 states have internal predecessors, (58766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:03,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22172 states to 22172 states and 58766 transitions. [2021-06-05 04:03:03,771 INFO L78 Accepts]: Start accepts. Automaton has 22172 states and 58766 transitions. Word has length 65 [2021-06-05 04:03:03,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:03,771 INFO L482 AbstractCegarLoop]: Abstraction has 22172 states and 58766 transitions. [2021-06-05 04:03:03,771 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:03,771 INFO L276 IsEmpty]: Start isEmpty. Operand 22172 states and 58766 transitions. [2021-06-05 04:03:03,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 04:03:03,784 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:03,784 INFO L521 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:03,985 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 726 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1596 [2021-06-05 04:03:03,985 INFO L430 AbstractCegarLoop]: === Iteration 735 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:03,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:03,985 INFO L82 PathProgramCache]: Analyzing trace with hash 2126121393, now seen corresponding path program 449 times [2021-06-05 04:03:03,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:03,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903652961] [2021-06-05 04:03:03,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:03,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:04,072 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 90 proven. 137 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:03:04,072 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:04,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903652961] [2021-06-05 04:03:04,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903652961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:04,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630108796] [2021-06-05 04:03:04,072 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 727 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 727 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:04,102 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-06-05 04:03:04,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:04,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:03:04,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:04,216 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 91 proven. 137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:04,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630108796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:04,216 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:04,216 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 17 [2021-06-05 04:03:04,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107558274] [2021-06-05 04:03:04,216 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:03:04,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:04,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:03:04,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:03:04,217 INFO L87 Difference]: Start difference. First operand 22172 states and 58766 transitions. Second operand has 18 states, 18 states have (on average 4.444444444444445) internal successors, (80), 17 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:04,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:04,473 INFO L93 Difference]: Finished difference Result 26579 states and 67053 transitions. [2021-06-05 04:03:04,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:03:04,473 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.444444444444445) internal successors, (80), 17 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 04:03:04,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:04,507 INFO L225 Difference]: With dead ends: 26579 [2021-06-05 04:03:04,508 INFO L226 Difference]: Without dead ends: 26561 [2021-06-05 04:03:04,508 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 120.5ms TimeCoverageRelationStatistics Valid=120, Invalid=260, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:03:04,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26561 states. [2021-06-05 04:03:04,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26561 to 22424. [2021-06-05 04:03:04,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22424 states, 22423 states have (on average 2.6555322659768987) internal successors, (59545), 22423 states have internal predecessors, (59545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:04,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22424 states to 22424 states and 59545 transitions. [2021-06-05 04:03:04,854 INFO L78 Accepts]: Start accepts. Automaton has 22424 states and 59545 transitions. Word has length 65 [2021-06-05 04:03:04,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:04,854 INFO L482 AbstractCegarLoop]: Abstraction has 22424 states and 59545 transitions. [2021-06-05 04:03:04,854 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.444444444444445) internal successors, (80), 17 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:04,854 INFO L276 IsEmpty]: Start isEmpty. Operand 22424 states and 59545 transitions. [2021-06-05 04:03:04,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 04:03:04,867 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:04,867 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:05,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1597,727 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:05,068 INFO L430 AbstractCegarLoop]: === Iteration 736 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:05,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:05,068 INFO L82 PathProgramCache]: Analyzing trace with hash 748398818, now seen corresponding path program 450 times [2021-06-05 04:03:05,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:05,068 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619088639] [2021-06-05 04:03:05,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:05,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:05,176 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 19 proven. 205 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:03:05,177 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:05,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619088639] [2021-06-05 04:03:05,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619088639] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:05,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353859378] [2021-06-05 04:03:05,177 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 728 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 728 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:05,207 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-06-05 04:03:05,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:05,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:03:05,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:05,293 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 206 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:03:05,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353859378] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:05,293 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:05,293 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 04:03:05,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528515163] [2021-06-05 04:03:05,293 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:03:05,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:05,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:03:05,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:03:05,294 INFO L87 Difference]: Start difference. First operand 22424 states and 59545 transitions. Second operand has 15 states, 15 states have (on average 4.4) internal successors, (66), 14 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:06,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:06,801 INFO L93 Difference]: Finished difference Result 29133 states and 73446 transitions. [2021-06-05 04:03:06,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-06-05 04:03:06,801 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.4) internal successors, (66), 14 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 04:03:06,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:06,835 INFO L225 Difference]: With dead ends: 29133 [2021-06-05 04:03:06,835 INFO L226 Difference]: Without dead ends: 29121 [2021-06-05 04:03:06,835 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 69 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1595 ImplicationChecksByTransitivity, 721.6ms TimeCoverageRelationStatistics Valid=429, Invalid=4541, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 04:03:06,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29121 states. [2021-06-05 04:03:07,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29121 to 23019. [2021-06-05 04:03:07,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23019 states, 23018 states have (on average 2.6487097054479105) internal successors, (60968), 23018 states have internal predecessors, (60968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:07,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23019 states to 23019 states and 60968 transitions. [2021-06-05 04:03:07,174 INFO L78 Accepts]: Start accepts. Automaton has 23019 states and 60968 transitions. Word has length 65 [2021-06-05 04:03:07,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:07,174 INFO L482 AbstractCegarLoop]: Abstraction has 23019 states and 60968 transitions. [2021-06-05 04:03:07,174 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.4) internal successors, (66), 14 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:07,174 INFO L276 IsEmpty]: Start isEmpty. Operand 23019 states and 60968 transitions. [2021-06-05 04:03:07,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 04:03:07,187 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:07,187 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:07,387 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 728 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1601 [2021-06-05 04:03:07,387 INFO L430 AbstractCegarLoop]: === Iteration 737 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:07,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:07,387 INFO L82 PathProgramCache]: Analyzing trace with hash -699824990, now seen corresponding path program 228 times [2021-06-05 04:03:07,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:07,388 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128297287] [2021-06-05 04:03:07,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:07,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:07,502 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 28 proven. 196 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:03:07,502 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:07,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128297287] [2021-06-05 04:03:07,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128297287] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:07,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670141901] [2021-06-05 04:03:07,502 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 729 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 729 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:07,534 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-06-05 04:03:07,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:07,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 04:03:07,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:07,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:03:07,613 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:03:07,615 INFO L628 ElimStorePlain]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 04:03:07,615 INFO L518 ElimStorePlain]: Eliminatee B vanished before elimination [2021-06-05 04:03:07,615 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:03:07,615 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:19, output treesize:1 [2021-06-05 04:03:07,621 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 28 proven. 196 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:03:07,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670141901] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:07,621 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:07,621 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-06-05 04:03:07,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198287859] [2021-06-05 04:03:07,621 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:03:07,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:07,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:03:07,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:03:07,622 INFO L87 Difference]: Start difference. First operand 23019 states and 60968 transitions. Second operand has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 13 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:08,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:08,069 INFO L93 Difference]: Finished difference Result 23667 states and 62168 transitions. [2021-06-05 04:03:08,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:03:08,070 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 13 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 04:03:08,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:08,095 INFO L225 Difference]: With dead ends: 23667 [2021-06-05 04:03:08,095 INFO L226 Difference]: Without dead ends: 23621 [2021-06-05 04:03:08,095 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 69 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 110.0ms TimeCoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:03:08,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23621 states. [2021-06-05 04:03:08,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23621 to 23030. [2021-06-05 04:03:08,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23030 states, 23029 states have (on average 2.6483129966563896) internal successors, (60988), 23029 states have internal predecessors, (60988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:08,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23030 states to 23030 states and 60988 transitions. [2021-06-05 04:03:08,402 INFO L78 Accepts]: Start accepts. Automaton has 23030 states and 60988 transitions. Word has length 65 [2021-06-05 04:03:08,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:08,402 INFO L482 AbstractCegarLoop]: Abstraction has 23030 states and 60988 transitions. [2021-06-05 04:03:08,402 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 13 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:08,402 INFO L276 IsEmpty]: Start isEmpty. Operand 23030 states and 60988 transitions. [2021-06-05 04:03:08,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 04:03:08,415 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:08,415 INFO L521 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:08,615 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1602,729 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:08,616 INFO L430 AbstractCegarLoop]: === Iteration 738 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:08,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:08,616 INFO L82 PathProgramCache]: Analyzing trace with hash 1135001495, now seen corresponding path program 451 times [2021-06-05 04:03:08,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:08,616 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919558923] [2021-06-05 04:03:08,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:08,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:08,713 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 76 proven. 151 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:03:08,713 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:08,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919558923] [2021-06-05 04:03:08,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919558923] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:08,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727233911] [2021-06-05 04:03:08,713 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 730 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 730 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:08,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:08,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:03:08,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:08,826 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 76 proven. 151 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:03:08,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727233911] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:08,826 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:08,826 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-06-05 04:03:08,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645118285] [2021-06-05 04:03:08,827 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:03:08,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:08,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:03:08,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:03:08,827 INFO L87 Difference]: Start difference. First operand 23030 states and 60988 transitions. Second operand has 15 states, 15 states have (on average 4.333333333333333) internal successors, (65), 14 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:09,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:09,063 INFO L93 Difference]: Finished difference Result 27017 states and 68127 transitions. [2021-06-05 04:03:09,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:03:09,064 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.333333333333333) internal successors, (65), 14 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 04:03:09,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:09,094 INFO L225 Difference]: With dead ends: 27017 [2021-06-05 04:03:09,094 INFO L226 Difference]: Without dead ends: 26990 [2021-06-05 04:03:09,094 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 106.5ms TimeCoverageRelationStatistics Valid=108, Invalid=198, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:03:09,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26990 states. [2021-06-05 04:03:09,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26990 to 23030. [2021-06-05 04:03:09,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23030 states, 23029 states have (on average 2.6481827261279256) internal successors, (60985), 23029 states have internal predecessors, (60985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:09,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23030 states to 23030 states and 60985 transitions. [2021-06-05 04:03:09,409 INFO L78 Accepts]: Start accepts. Automaton has 23030 states and 60985 transitions. Word has length 65 [2021-06-05 04:03:09,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:09,409 INFO L482 AbstractCegarLoop]: Abstraction has 23030 states and 60985 transitions. [2021-06-05 04:03:09,409 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.333333333333333) internal successors, (65), 14 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:09,409 INFO L276 IsEmpty]: Start isEmpty. Operand 23030 states and 60985 transitions. [2021-06-05 04:03:09,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 04:03:09,422 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:09,422 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:09,623 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1603,730 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:09,623 INFO L430 AbstractCegarLoop]: === Iteration 739 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:09,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:09,623 INFO L82 PathProgramCache]: Analyzing trace with hash 688707308, now seen corresponding path program 452 times [2021-06-05 04:03:09,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:09,623 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127401640] [2021-06-05 04:03:09,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:09,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2021-06-05 04:03:09,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1608 [2021-06-05 04:03:09,740 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 04:03:09,741 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 04:03:09,743 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 04:03:09,743 INFO L202 PluginConnector]: Adding new model array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 04:03:09 BasicIcfg [2021-06-05 04:03:09,743 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 04:03:09,743 INFO L168 Benchmark]: Toolchain (without parser) took 888704.06 ms. Allocated memory was 343.9 MB in the beginning and 7.1 GB in the end (delta: 6.7 GB). Free memory was 323.3 MB in the beginning and 3.8 GB in the end (delta: -3.4 GB). Peak memory consumption was 3.3 GB. Max. memory is 16.0 GB. [2021-06-05 04:03:09,744 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 343.9 MB. Free memory was 324.4 MB in the beginning and 324.3 MB in the end (delta: 76.3 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 04:03:09,744 INFO L168 Benchmark]: Boogie Procedure Inliner took 17.53 ms. Allocated memory is still 343.9 MB. Free memory was 323.2 MB in the beginning and 321.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.0 GB. [2021-06-05 04:03:09,744 INFO L168 Benchmark]: Boogie Preprocessor took 9.84 ms. Allocated memory is still 343.9 MB. Free memory was 321.8 MB in the beginning and 320.8 MB in the end (delta: 953.6 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 04:03:09,744 INFO L168 Benchmark]: RCFGBuilder took 150.35 ms. Allocated memory is still 343.9 MB. Free memory was 320.7 MB in the beginning and 309.8 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. [2021-06-05 04:03:09,744 INFO L168 Benchmark]: TraceAbstraction took 888502.99 ms. Allocated memory was 343.9 MB in the beginning and 7.1 GB in the end (delta: 6.7 GB). Free memory was 309.3 MB in the beginning and 3.8 GB in the end (delta: -3.5 GB). Peak memory consumption was 3.3 GB. Max. memory is 16.0 GB. [2021-06-05 04:03:09,744 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 343.9 MB. Free memory was 324.4 MB in the beginning and 324.3 MB in the end (delta: 76.3 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 17.53 ms. Allocated memory is still 343.9 MB. Free memory was 323.2 MB in the beginning and 321.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 9.84 ms. Allocated memory is still 343.9 MB. Free memory was 321.8 MB in the beginning and 320.8 MB in the end (delta: 953.6 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 150.35 ms. Allocated memory is still 343.9 MB. Free memory was 320.7 MB in the beginning and 309.8 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. * TraceAbstraction took 888502.99 ms. Allocated memory was 343.9 MB in the beginning and 7.1 GB in the end (delta: 6.7 GB). Free memory was 309.3 MB in the beginning and 3.8 GB in the end (delta: -3.5 GB). Peak memory consumption was 3.3 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 52]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 66 with TraceHistMax 9,while InterpolatingTraceCheckCraig was constructing Craig interpolants,while PredicateComparison was comparing new predicate (quantifier-free) to 15 known predicates. - TimeoutResultAtElement [Line: 52]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 66 with TraceHistMax 9,while InterpolatingTraceCheckCraig was constructing Craig interpolants,while PredicateComparison was comparing new predicate (quantifier-free) to 15 known predicates. - TimeoutResultAtElement [Line: 57]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 66 with TraceHistMax 9,while InterpolatingTraceCheckCraig was constructing Craig interpolants,while PredicateComparison was comparing new predicate (quantifier-free) to 15 known predicates. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 36 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 888435.3ms, OverallIterations: 739, TraceHistogramMax: 10, EmptinessCheckTime: 5796.9ms, AutomataDifference: 457393.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 18.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 46277 SDtfs, 244625 SDslu, 324314 SDs, 0 SdLazy, 520073 SolverSat, 19284 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 176208.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 59633 GetRequests, 38754 SyntacticMatches, 871 SemanticMatches, 20008 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1042362 ImplicationChecksByTransitivity, 247214.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=39214occurred in iteration=690, InterpolantAutomatonStates: 19227, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 131118.3ms AutomataMinimizationTime, 738 MinimizatonAttempts, 3065093 StatesRemovedByMinimization, 735 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1918.1ms SsaConstructionTime, 10316.2ms SatisfiabilityAnalysisTime, 122675.8ms InterpolantComputationTime, 75408 NumberOfCodeBlocks, 75387 NumberOfCodeBlocksAsserted, 5005 NumberOfCheckSat, 73941 ConstructedInterpolants, 805 QuantifiedInterpolants, 578045 SizeOfPredicates, 1307 NumberOfNonLiveVariables, 86625 ConjunctsInSsa, 16197 ConjunctsInUnsatCore, 1467 InterpolantComputations, 11 PerfectInterpolantSequences, 66077/201987 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown